Consulta: subjectFacets:"Mortality"
Registros recuperados: 306
Data/hora: 04/06/2024 00:24:59

Efectividad biológica de seis rodenticidas utilizados para el control de Sigmodon hispidus (Rodentia: Cricetidae) en caña de azúcar
Provedor de dados: 32
Autores: Fuentes Sierra, Elvis.
Los estudios relacionados con el control químico de la rata algodonera o  cañera son escasos, por lo que es difícil tener acceso a la información.  Desafortunadamente en México los rodenticidas se aplican con base en  recomendaciones generales, por lo que es importante evaluar la efectividad de estos  productos en condiciones controladas y de campo. El objetivo en este trabajo fue  conocer la efectividad biológica de los rodenticidas: warfarina®, difacinona®,  brodifacum®, flocumafen®, bromadiolona® y fosfuro de zinc® a través del consumo  y la susceptibilidad de Sigmodon hispidus en caña de azúcar. Este estudio se realizó  siguiendo las normas establecidas en las guías EPA y EPPO, para evaluación de  productos químicos (rodenticidas). Los resultados...
Tipo: Tesis
Palavras-chave: Sigmodon hispidus; Rodenticidas; Mortalidad; Preferencias alimenticias; Modelo Jolly-Seber; Maestría; Agroecosistemas Tropicales; Rodenticides; Mortality; Dietary preferences; Jolly-Seber method.
Ano: 2007
URL: http://hdl.handle.net/10521/1478

Evidence that a Highway Reduces Apparent Survival Rates of Squirrel Gliders
Provedor de dados: 7
Autores: McCall, Sarah C; Australian Research Centre for Urban Ecology; School of Botany, University of Melbourne;; McCarthy, Michael A; School of Botany, University of Melbourne; mamcca@unimelb.edu.au; van der Ree, Rodney; Australian Research Centre for Urban Ecology; School of Botany, University of Melbourne; rvdr@unimelb.edu.au; Harper, Michael J; Australian Research Centre for Urban Ecology; Department of Sustainability and Environment, Victoria;; Cesarini, Silvana; School of Biological Scienes, Monash University;; Soanes, Kylie; Australian Research Centre for Urban Ecology;.
Roads and traffic are prominent components of most landscapes throughout the world, and their negative effects on the natural environment can extend for hundreds or thousands of meters beyond the road. These effects include mortality of wildlife due to collisions with vehicles, pollution of soil and air, modification of wildlife behavior in response to noise, creation of barriers to wildlife movement, and  establishment of dispersal conduits for some plant and animal species. In southeast Australia, much of the remaining habitat for the squirrel glider, Petaurus norfolcensis, is located in narrow strips of Eucalyptus woodland that is adjacent to roads and streams, as well as in small patches of woodland vegetation that is farther from roads. We evaluated...
Tipo: Peer-Reviewed Reports
Palavras-chave: Australia; Emigration; Mortality; Population persistence; Road ecology; Squirrel glider; Survival.
Ano: 2010

Effects of Roads on Animal Abundance: an Empirical Review and Synthesis
Provedor de dados: 7
Autores: Fahrig, Lenore; Carleton University, Geomatics and Landscape Ecology Laboratory, Department of Biology; lfahrig@ccs.carleton.ca; Rytwinski, Trina; Carleton University, Geomatics and Landscape Ecology Laboratory, Department of Biology; trytwins@connect.carleton.ca.
We attempted a complete review of the empirical literature on effects of roads and traffic on animal abundance and distribution. We found 79 studies, with results for 131 species and 30 species groups. Overall, the number of documented negative effects of roads on animal abundance outnumbered the number of positive effects by a factor of 5; 114 responses were negative, 22 were positive, and 56 showed no effect. Amphibians and reptiles tended to show negative effects. Birds showed mainly negative or no effects, with a few positive effects for some small birds and for vultures. Small mammals generally showed either positive effects or no effect, mid-sized mammals showed either negative effects or no effect, and large mammals showed predominantly negative...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Environmental impact; Landscape connectivity; Mortality; Population density; Road network; Road density; Road effect zone; Road mitigation; Species distribution; Species richness; Traffic density; Traffic volume.
Ano: 2009

Mortality and injuries of Olrog's Gull (Larus atlanticus) individuals associated with sport fishing activities in Mar Chiquita coastal lagoon, Buenos Aires Province
Provedor de dados: 68
Autores: Berón,M. Paula; Favero,Marco.
The Olrog's Gull (Larus atlanticus) is an endemic species of the Atlantic coasts of southern South America and is considered vulnerable to extinction. Olrog's Gull individuals of different age classes die in Mar Chiquita coastal lagoon, Buenos Aires Province, while interacting with sport fisheries. Due to its restricted distributional range and their scarce populations, a slight increase in mortality rates may easily affect populations of this species by altering survival rates of all or particular age classes. The evaluation of this impact and the proposal of mitigation measures (also comprising an educational component) are essential for the conservation of this species in non-breeding grounds.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Conservation; Larus atlanticus; Mortality; Olrog's Gull; Sport fishing activities.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072009000200006

TECHNICAL FEASIBILITY OF THE ACCLIMATIZATION SYSTEM IN AVIARY OF POSTURE: A CASE STUDY
Provedor de dados: 70
Autores: Pereira,Danilo F.; Kodaira,Vanessa; Bueno,Leda G. de F.; Soares,Nilce M.; Salgado,Douglas D'Alessandro.
ABSTRACT: The objective of this study was to compare the performance of laying hens between automated aviaries, one with and another without acclimatized system. On a daily basis it was registered in each aviary the mortality, the egg production, and the feed consumption. The variables of the dry bulb temperature, relative humidity and black globe temperature were registered every 30 minutes using the thermos hygrometer. Every 28 days ninety eggs from each aviary were collected randomly and the variables egg weight, shell weight, shell thickness and Haugh Unit were registered. The consumption and quality of the electrical energy supply were monitored every 30 minutes using registers of electrical magnitude. The results showed that the acclimatization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ambience; Electrical energy; Mortality; Egg production; Precision animal science.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000500855

Effects of caffeine and used coffee grounds on biological features of Aedes aegypti (Diptera, Culicidae) and their possible use in alternative control
Provedor de dados: 74
Autores: Laranja,Alessandra Theodoro; Manzatto,Antonio José; Campos Bicudo,Hermione Elly Melara de.
Caffeine and used coffee grounds completely blocked the development of Aedes aegypti in the early stages, in treatments with the concentrations 1.0 mg/mL and 50 mg/mL, respectively. More advanced stages and even adults were obtained in lower concentrations of both substances, enabling observations to be made of mortality rate, longevity and esterase patterns. The experiments involved treatments using either eggs or 3rd instar larvae (L3), with or without the addition of fish food. Mortality rates prior to the adult stage and adult longevity were significantly different in the comparisons among treatments, in every kind of experiment, but in those using L3 larvae, their percentages were smaller. Observations of the time of larva and adult onset suggested...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aedes aegypti; Caffeine; Used coffee grounds; Mortality; Longevity; Esterases; Alternative control.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572003000400004

Акватория и берега Севастополя: экосистемные процессы и услуги обществу
Provedor de dados: 13
Autores: Шадрин, Н. В.; Павлова, Е. В.
В монографии представлены результаты изучения современной экологической ситуации в акватории Севастополя. Рассмотрены также вопросы взаимосвязей функционирования экосистем и социально-экономического развития. Для экологов, экономистов, менеджеров, студентов и жителей Севастополя.
Tipo: Book
Palavras-chave: Ecosystems; Scales; Models; Anthropogenic factors; Eutrophication; Ichthyoplankton; Phytoplankton; Zooplankton; Oil pollution; Litter; Mortality; Coastal zone; Biodiversity; Rivers; Zooplankton; Ecosystems; Scales; Models; Eutrophication; Rivers; Biodiversity; Phytoplankton; Anthropogenic factors; Mortality; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_6838; Http://aims.fao.org/aos/agrovoc/c_4881; Http://aims.fao.org/aos/agrovoc/c_2734; Http://aims.fao.org/aos/agrovoc/c_6617; Http://aims.fao.org/aos/agrovoc/c_33949; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_34996; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://repository.ibss.org.ua/dspace/handle/99011/381

Impact of a power plant cooling system on copepod and meroplankton survival (Bahía Blanca estuary, Argentina)
Provedor de dados: 76
Autores: Hoffmeyer,Mónica Susana; Biancalana,Florencia; Berasategui,Anabella.
The impact of a power plant cooling system in the Bahía Blanca estuary (Argentina) on the survival of target zooplanktonic organisms (copepods and crustacean larvae) and on overall mesozooplankton abundance was evaluated over time. Mortality rates were calculated for juveniles and adults of four key species in the estuary: Acartia tonsa Dana, 1849 and Eurytemora americana Williams, 1906 (native and invading copepods), and larvae of the crab Chasmagnathus granulata Dana, 1851 and the invading cirriped Balanus glandula Darwin, 1854. Mean total mortality values were up to four times higher at the water discharge site than at intake, though for all four species, significant differences were only registered in post-capture mortality. The findings show no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Copepods; Meroplankton; Estuary; Cooling system; Mortality.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212005000300011

Longevidade e oviposição de Ophyra albuquerquei (Diptera, Muscidae) em condições de laboratório
Provedor de dados: 76
Autores: Krüger,Rodrigo F.; Ribeiro,Paulo B.; Carvalho,Claudio J. B. de; Lambrecht,Francine M.; Nunes,Adrise M.
Aspects related to the longevity and oviposition of Ophyra albuquerquei Lopes, 1985 are studied. Males had a mean lifespan longer than females (40.24 vs. 33.15 days, respectively), while still possessing qualitative advantages during this period. Females O. albuquerquei were fed on powdered milk, fish flour, refined sugar and water, and provided fish flour and moistened sawdust for oviposition. The length of the oviposition period for females was 46.75 days, and most of the deposition of the eggs occurred in the first days of the colony. Females completed 50% of their egg deposition by Day 16, seven days before the large last mortality peak and about 12 days after the first oviposition in the colony. Females deposited an average of 184 eggs per individual....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial diet; Lifespan; Mortality; Ophyra; Senescence.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000200014

Fatores que afetam a mortalidade de cabritos em função da época de nascimento.
Provedor de dados: 14
Autores: RIERA, G. S.; SIMPLICIO, A. A.; FIGUEIREDO, E. A. P.
1.Numero e porcentagem de crias nascidas por raca e subperiodo; 2.Prolificidade das matrizes, pesos ao nascer e mortalidade das crias de acordo com o subperiodo de nascimento; 3.Mortalidade de crias em relacao a idade; 4.Mortalidade das crias por raca e tipo de parto; 5.Mortalidade (%) e idade media a morte (dias) segundo o sexo das crias; 6.Mortalidade de crias por racas ate 14 de agosto de 1980 e sua relacao com a prolificidade.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Caprino; Mortalidade; Parto; Goats; Mortality; Weight; Birth rate.
Ano: 1980
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/514253

Ecologia populacional de especies arboreas na estacao ecologica do Panga (Uberlandia-MG).
Provedor de dados: 14
Autores: AQUINO, F. de G.; OLIVEIRA, M. C. de; RIBEIRO, J. F.; SCHIAVINI, I.
bitstream/CPAC-2009/24594/1/bolpd_26.pdf
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: ECFLOR100; Acacia glomerosa; Uberlandia; Minas Gerais; Brasil; Species; Plant population; Growth.; Anadenanthera Macrocarpa; Biodiversidade; Árvore; Crescimento; Cerrado; Ecologia Vegetal; Dinâmica Populacional; Espécie; Mortalidade; População de Planta.; Brazil; Biodiversity; Plant ecology; Population dynamics; Mortality; Trees.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/548581

Deficiências de cálcio, fósforo e cobre, e toxicidade pelo ferro em bubalinos na ilha de Marajó.
Provedor de dados: 14
Autores: COSTA, N. A. da; MOREIRA, J. R. de A.
bitstream/item/59123/1/CPATU-ComTec41.pdf
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Bubalino; Ilha do Marajó; Pará; Brasil; Buffalo; Deficiency; Intoxication.; Bubalus Bubalis; Cálcio; Cobre; Deficiência; Ferro; Fósforo; Intoxicação; Mortalidade.; Mineral; Amazonia; Copper; Calcium; Iron; Mortality; Phosphorus.
Ano: 1983
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376355

Ocorrência de Mammomonogamus laryngeus parasitando búfalos no Estado do Pará - Brasil.
Provedor de dados: 14
Autores: LAU, H. D.
bitstream/item/31913/1/CPATU-BP43.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Jafarabadi; Murrah; Mediterraneo; Carabao; Mammomonogamus laryngeus; Belem; Pará; Brasil; Buffalo.; Búfalo; Mortalidade; Parasitismo.; Amazonia; Mortality; Parasitism.
Ano: 1982
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382263

Larval rearing and weaning of seabass, Lates calcarifer (Block), on experimental compounded diets
Provedor de dados: 5
Autores: Fuchs, Jacques; Nedelec, Georges.
Larval rearing trials of seabass larvae, either imported from Singapore or obtained from the captive broodstock of IFREMER/C.O.P. at Tahiti, were carried out since 1987, by testing different technologies originally used in South East Asia (green-water culture, sequential water changes) or developed by IFREMER for other species (clear water system, preys enrichment, continuous water renewal).
Tipo: Text
Palavras-chave: Lates calcarifer; Diets; Survival; Fish larvae; Brood stocks; Mortality; Pellet feeds; Artificial feeding; Swimming; Abnormalities; Swim bladder; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1433.pdf

Etude des mortalités ostréicoles de l'hiver 1998/1999 en Baie des Veys. Caractérisation et analyse temporelle des dessalures observées sur les parcs conchylicoles de la baie de Veys depuis 1996.
Provedor de dados: 5
Autores: Ropert, Michel; Kopp, Joel.
The Shellfish Laboratory of Normandy (LCN : Laboratoire Conchylicole de Normandie) observed unusual hydrologic anomalies associated with important oyster mortalities during the winter of 1999. These anomalies were described as sudden salinity variations during the lidal cycle, particularly on the rising tide. Starting in 1996 a multi-parameter probe was used to monitor salinity, temperature and depth every 10 to 20 minutes in the inter-tidal zone. Alter data processing and filtering, two criteria concerning low salinity were chosen : amplitude and duration. Application of a cumulative function (Ibanez et al., 1993) to this time series data treatment showed the 3 year trend (1996-1999). Salinity variation data and climatic data were used in a multivariate...
Tipo: Text
Palavras-chave: Crassostrea gigas; Mortalités; Salinité; Baie des Veys; Suivi; Crassostrea gigas; Mortality; Salinity; Baie of Veys; Monitoring.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00102/21310/18928.pdf

L'huître creuse Crassostrea gigas en Bretagne. Résultats du réseau de suivi de 1991
Provedor de dados: 5
Autores: Le Bec, Claude; Mazurie, Joseph.
The year 1991 is the third one of the regional network on growth assessment of Crassostrea gigas in Brittany, wearing on 9 sites and 3 stations per site. 2 bags of 210 oysters, 18 month old, were placed in each station. Comparatively to previous years, the 1991 growth was moderate, and condition index inferior. However, the survival rates were very high (above 91 %) and most of the slight mortalities occurred a short time after stocking (as revealed by the sizes of dead shells). An improvement was also observed in the infestation rate by the polychaete Polydora sp..Most of the growth differences between sites and stations are still present. An analytical study including environmental variables would be necessary for explanations and will be tempted in 1993.
Tipo: Text
Palavras-chave: Bretagne; Crassostrea gigas; Croissance; Mortalité; Indice de condition; Polydora; A.C.P.; Brittany; Crassostrea gigas; Growth; Mortality; Condition index; Polydora; Factorial analysis.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00102/21319/18939.pdf

Assessment and interpretation of temporal or spactial differences in shellfish productivity of typical French ecosystems
Provedor de dados: 5
Autores: Mazurie, Joseph; Soletchnik, Patrick; Ropert, Michel; Fleury, Pierre-gildas; Auby, Isabelle; Maurer, Daniele; Bacher, Cedric.
Monitoring of Crassostrea gigas performances, from two year-classes, during 12 years, in various French shellfish farming areas have revealed great inter-annual and inter-sites differences in reproduction, growth, mortality or quality of oysters (meat content, Polydora infestation...). The presentation attempts to highlight how a comparative analysis of existing temporal or spatial data on molluscs, water quality, geography or meteorogoly may help to better understand and manage shellfish ecosystems. The range of hydrobiological conditions (food availability, turbidity, temperature...) recorded at national, pluriannual scale, in relation to shellfish performances, enlarges the base of such relationship. However, undirect causative factors, either natural...
Tipo: Text
Palavras-chave: Climatic modulation; Hydro geography; Reproduction; Growth; Spatial differences; Water quality; Mortality; Shellfish productivity.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/acte-3318.pdf

Length based catch analysis for east Atlantic Mediterranean bluefin tuna
Provedor de dados: 5
Autores: Kell, Laurence T; Bonhommeau, Sylvain; Fromentin, Jean-marc.
Although the bluefin assessment is based on catch-at-age data, ageing using hard parts is an expensive and d{fficult process. Therefore length data are converted into age for bluefin using a growth curve, i.e. age slicing. Where age is predicted from length using the inverse of the von Bertalanffy growth curve. Here we show how a simple method based on length data alone can be used to estimate population parameters such as total mortality (Z).
Tipo: Text
Palavras-chave: Bluefin; Catch curve analysis; Growth; Length; Mortality.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00191/30274/28734.pdf

REMONOR : Résultats 2006. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: 5
Autores: Ropert, Michel; Pien, S.; Mary, Charlotte; Bouchaud, B.
Le réseau régional de suivi REMONOR s'appuyant sur les acquis du réseau national REMORA de l'Ifremer, évalue chaque année la mortalité, la croissance et la qualité sur deux classes d'âges d'huîtres creuses (« adultes » = 2 ans et « juvéniles » = 1 an), réparties entre différentes stations dans les principaux secteurs ostréicoles Bas-Normands.  Ce réseau, mené en collaboration par le LERN (Laboratoire Environnement Ressources de Normandie) et le SMEL (Syndicat Mixte de L'Equipement du Littoral), intègre deux nouvelles stations en 2006 : Veules les Roses (VR01), dont le suivi, allégé l'an dernier, est aujourd'hui complet et Denneville (CO10) qui doit compléter les connaissances sur le nord de la Côte Ouest du Cotentin. Une station est à l'étude cette année...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3468.pdf

Relationships between oyster mortality patterns and environmental data from monitoring databases along the coasts of France
Provedor de dados: 5
Autores: Soletchnik, Patrick; Ropert, Michel; Mazurie, Joseph; Fleury, Pierre-gildas; Le Coz, Florence.
Oyster mortality was monitored at multiple sites along the French coastline (around 5 500 km) between 1993 and 2005. Mortality data for one- and two-year-old oysters were collected over 10–12 years in 39 oyster culture sites bordering 3 different "seas": the English Channel, Bay of Biscaye and Mediterranean. Combining these data with records from environmental monitoring databases, 11 of these sites had consistent chronological data sets including both environmental data and mortality records. Mortality in one-year-old oysters was clearly summer mortality (49% of their annual mortality) whereas mortality of two-year-olds occurred mostly in spring (51%). Analysis of variance revealed that "coastal area" was the main influence on mortality of one-year-olds...
Tipo: Text
Palavras-chave: Mortality; Environment; Crassostrea gigas; Pacific oyster.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3295.pdf

Herpesviruses associated with mortalities among Pacific oyster, Crassostrea gigas, in France-Comparative study
Provedor de dados: 5
Autores: Renault, Tristan; Le Deuff, Rose-marie; Cochennec, Nathalie; Maffart, Patricia.
Sporadic mortalities were reported in june and july of 1992 and 1993 among batches of hatchery-reared larval Pacifie oyster, Crassastrea gigas, and at the beginning of July and in August of 1993 among five batches of 3-7 month old young spats, C. gigas. Observations with transmission electron microscope showed the presence of herpes-like virus particles in infected larvae and young spats. The viruses observed in diseased larvae and affected young spat oysters were very similar. Elevated temperature and crowding may increase susceptibility of oysters to these herpes-like virus infections.
Tipo: Text
Palavras-chave: Spat; Larvae; Crassostrea gigas; Pacific oysters; Mortality; Herpes like virus; Naissain; Larve; Crassostrea gigas; Huître japonaise; Mortalités; Herpès like virus.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-2898.pdf

Problems and perspectives of the pearl oyster aquaculture in French Polynesia.
Provedor de dados: 5
Autores: Cabral, P.
The first attempt to obtain artificial pearls from the black-lip pearl oyster Pinctada margaritifera in French Polynesia dates back to 1963. The pearl oyster culture has grown quickly especially since the eighties. This industry is now the first exportation in value of French Polynesia. 19 atolls of the Tuamotus island have at this time one or more farms and this activity has more and more attractiveness. The rise of this industry has consequently a lot of socio-ecomic repercussions on these atolls. However, as a young industry, the technics and the development are not always controlled and a lot of problems appeared these last years.
Tipo: Text
Palavras-chave: French Polynesia; Pinctada margaritifera; Trade; Economic analysis; Harvesting; Hatcheries; Spat; Lagoons; Mortality; Oyster culture; Pearl oysters.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1494.pdf

Pratiques culturales et mortalités d'huîtres creuses Crassostrea gigas en baie de Quiberon, en 2001-2002. Bilan des enquêtes, plongées et prélèvements sur 18 semis en 2001-2002
Provedor de dados: 5
Autores: Mazurie, Joseph; Langlade, Aime; Fleury, Pierre-gildas; Bouget, Jean-francois; Claude, Serge; Foucart, Marie; Bedier, Edouard.
This study is the second part of a former report rapport Ifremer DRV/RST/RA/LCB/2002-08 dealing with rearing methods, growth and mortality performances, and problems encountered by the oyster farmers from Quiberon Bay (2800 ha of leases) : the first report relied on a survey achieved in july 200l, about 18 oyster farmers, and 2 diving campaigns (july and october 2001) on 2 years old oyster batches from the same farmers. Il is now completed by a last campaign of diving in october 2002, on 7 parcels out of the 18, still bearing the initial oysters. The analysed enterprises vary in particular by the location and depth of their concession inside the bay, but also by their rearing scheme : a majority favours seedings with 18 month old oysters or more, according...
Tipo: Text
Palavras-chave: Huître creuse; Crassastrea gigas; Baie de Quiberon; Croissance; Mortalité; Pratiques culturales; Rentabilité économique; Cupped oyster; Crassostrea gigas; Mortality; Rearing practices; Profitability; Bay of Quiberon; .growlh.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00102/21322/18944.pdf

Vibrio damsela as a pathogenic agent causing mortalities in cultured sea bass (Lates calcarifer)
Provedor de dados: 5
Autores: Renault, Tristan; Haffner, Philippe; Malfondet, C.; Weppe, Maurice.
Vibrio anguillarum and Vibrio ordali are species frequently described as fish pathogens. Seven species of Vibrio can also be implicated in disease problems in mariculture (Toranzo  1990). sorne of Vibrios and Barja, In addition, these marine such as V. vulnificus (Tison et al.. 1982) and V. damsela (Love et al., 1981) can  also cause illness homoiothermic animals
Tipo: Text
Palavras-chave: Fish pathogens; Lates calacrifer; Mortality; Vibrio damsela.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/publication-2889.pdf

Analyse des pratiques, contraintes et performances d'élevage de l'huître creuse Crassostrea gigas, en 2001, sur différentes concessions en eau profonde de la Baie de Quiberon : enquête auprès de 18 concessionnaires et plongées sur 18 semis d'huîtres de 2 ans, en juin et octobre 2001
Provedor de dados: 5
Autores: Mazurie, Joseph; Foucart, Marie; Langlade, Aime; Bouget, Jean-francois; Fleury, Pierre-gildas; Joly, Jean-pierre; Martin, Anne-genevieve.
This study deals with rearing methods, growth and mortality performances, and problems encountered by the oyster farmers from Quiberon Bay (2800 ha of leases) : it relies on a survey achieved in july 2001, about 18 oyster farmers, and 2 diving campaigns (july and october 2001) on 2 years old oyster batches from the same farmers.  The analysed enterprises vary in particular by the location and depth of their concession inside the bay, but also by their rearing scheme : a majority favours seedings with 18 month old oysters or more, according to prices and availability of oysters supplies. The duration until marketable size and mean mortalities seem to have increased since a preceding inquiry in 1986.  The main constraint, affecting priorly the south border...
Tipo: Text
Palavras-chave: Rearing practices; Density; Predators; Mortality; Growth; Bay of Quiberon; Crassostrea gigas; Cupped oyster; Pratiques culturales; Densité; Algues; Prédateurs; Mortalité; Croissance; Baie de Quiberon; Crassostrea gigas; Huître creuse.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-6103.pdf

Réseau d'évaluation de la croissance de l'huître creuse sur les côtes françaises (REMORA). Résultats des stations de BRETAGNE (Année 2000)
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Claude, Serge; Bouget, Jean-francois; Langlade, Aime; Le Coguic, Yvette.
Every year, from March to December, the IFREMER / REMORA network carries out a survey of mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year ciass ; and "adults" = two-years class), distributed among various stations of the main French oyster areas. In Brittany, this network includes 11 points, to which regional points can be added (15 in 2000). With regard to the Breton stations of the network, the year 2000 showed rather low mortality rates, excepted mortality of several oysters when transfered to the sea. Several areas however had higher mortality rates (&gt; 20%) : l'Arguenon, Morlaix, les Abers, Pen-Bé and Le Croisic. 2000 is a year of good growth in South Brittany (72.8 g in December), more average in North Brittany...
Tipo: Text
Palavras-chave: REMORA; Bretagne; Huître creuse; Mortalité; Croissance; Qualité commerciale; Polydora; REMORA; Brittany; Gigas (cupped) oyster; Mortality; Growlh; Commercial qualily; Polydora.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00113/22389/20084.pdf

Analyse des résultats d'une ferme d'élevage de crevettes sur 20 années : SODACAL 1984-2004. "Elasticité" de la capacité de production d'un écosystème bassin crevetticole
Provedor de dados: 5
Autores: Della Patrona, Luc.
SODACAL prawn farm which was set up as a pilot farm for the development of a prawn industry in New Caledonia, saw its production exponentially rise from 1984 to 1992 (to 400 t/year, then experienced a sharp drop in 1993 (250 t/year) which carried on until 1997, and finally rose back to a stabilizing level around 400 t/year until 1999. The study analyses the difficulties observed before and during the drop of production. Among them, mortality outbreaks, other biological perturbations (benthic mat clearing and crab and fish mortality) and focus on the noxious state of the bottom (reduced and smelling sulfide hydrogen). It particularly shows that Syndrome 93 outbreaks could be observed on this farm from 1990. The analysis highlights the particular climatic...
Tipo: Text
Palavras-chave: New Caledonia; Zootechny; Climate; Ecosystem; Lethal factor; Mortality; Production; Pond culture; Shrimp culture; Climat; Facteur léthal; Bassin élevage; Zootechnie; Dysfonctionnement; Production; Nouvelle Calédonie; Aquaculture.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-718.pdf

Réseau de Pathologie des Mollusques - Secteurs Nord-Loire - Année 1999. Bilan des travaux de la cellule zoosanitaire de La Trinité-sur-Mer
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Tige, Gilbert; Hirata, Toshio; Le Coguic, Yvette; Chollet, Bruno; Robert, Maeva; Thebault, Anne.
Within the context of the mollusc pathology monitoring network, this report assesses the follow-up and work done by the zoosanitary unit of Trinité-sur-Mer on the whole of the French farming and bed areas of the North Loire for the year 1999.
Tipo: Text
Palavras-chave: Herpes virus; Pathology; Mortality; Britanny (France); Normandy; Clam; Abalone; Cockle; Mussel; Pacific cupped oyster; European flat oyster; Herpès virus; Pathologie; Mortalité; Bretagne; Normandie; Naissain; Palourde; Ormeau; Coque; Moule; Huître creuse; Huître plate.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-1921.pdf

Ostreid herpes virus 1 infection in families of the Pacific oyster, Crassostrea gigas, during a summer mortality outbreak: Differences in viral DNA detection and quantification using real-time PCR
Provedor de dados: 5
Autores: Sauvage, Christopher; Pepin, Jean-francois; Lapegue, Sylvie; Boudry, Pierre; Renault, Tristan.
Ostreid herpes virus 1 (OsHV-1) infections, notably reported in Europe and the USA, are closely associated with significant mortalities of the Pacific oyster, Crassostrea gigas, especially during its early stages of life. In summer 2006, we monitored mortality by strict daily verification of three full-sib families of oysters reared under common conditions. We quantified OsHV-1 using real-time PCR in dead and living individuals during and after a mortality event. Mortality events were severe and brief, but significantly different between tested families (cumulative mortality ranging from 1.2 to 49%). Real-time PCR assays revealed different viral DNA loads in dead individuals from different families (P &lt; 0.001). Moreover, the mean level of infection...
Tipo: Text
Palavras-chave: Viral DNA quantification; Real time PCR; OsHV 1; Mortality; Crassostrea gigas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6265.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; résultats des stations NATIONALES ; Année 2001
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Cornette, Florence; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine; Pien, S.
The monitoring network IFREMER /REMORA is assessing, on a yearly basis, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year old ; and "adults" = two-years old), distributed among various stations of the main French oyster areas. Samplings are carried out in March, June, September and December. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. In 2001, mortality mainly occured in Summer on "adults" in baie des Veys (Normandy) and on juveniles in Cancale and Pénerf (Brittany) and in Fouras and Marennes (Poitou-Charentes). With an average individual weigh of 59 g in December, 2001 has been a...
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Cupped (gigas) oyster; France; REMORA; Polydora; Qualité; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2438.pdf

Contributions du Laboratoire Conchylicole de Normandie (LCN) au défi MOREST en 2002
Provedor de dados: 5
Autores: Ropert, Michel; Simonne, Charlotte; Hugonnet, Virginie; Le Gagneur, Eric; Kopp, Joel.
This report present results obtained by the LCN in coastal Ecology of the MOREST program. Most of works presented here have been realised in collaboration with different partners who are cited before each action. This report is divided in 8 parts in 3 themes. WP2 : Characterisation of in-situ summers mortalities • Task 2.2.1. : dynamics of mortality, reproduction and spawning. lntersite comparisons (BASE) • Task 2.2.4 : study of the summer mortalities dynamics of Crassostrea gigas in Bay of Veys (SUMO) WP4 : Experimental tests to cast off summer mortalities problem • Task 4.3.: reduce the critical period before laid: induce oyster laid in the Bay of Veys. • Task 4.4.1.: effects of transfer livestock on summer mortalities : move oysters before the...
Tipo: Text
Palavras-chave: Crassostrea gigas; Mortalité; MOREST; Baie de Veys; Normandie; Crassostrea gigas; Mortality; MOREST; Bay of Veys; Normandy.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00436/54780/56238.pdf

L'adaptation ecophysiologique et sanitaire de l'ecrevisse turque Astacus leptodactylus a des milieux saumatres: Contribution a l'astaciculture
Provedor de dados: 5
Autores: Barbe, D; Lautier, J; Vernet, G; Vey, A.
This influence of salt media on different aspects of biological cycle and on most common pathogenic agents of Turkish freshwater crayfish Astacus leptodactylus is investigated survival and growing of juveniles O super(+) and intermediary individuals 1 super(+) are also studied. Total osmotic metabolism and reproduction, have been recorded. It appears that youngest individuals are particularly sensitive to low salinities (7 ppt.). Intermediary ones are more resistant nevertheless salinity does not improve neither survival nor growing. Copulation, laying and pleopod egg fixation are particularly affected by salt waters. The only promising application of salinity parameter on astaciculture could be whether prophylactic or curative treatment with concentrated...
Tipo: Text
Palavras-chave: Astacus leptodactylus; Malacostraca; Infectious diseases; Sexual reproduction; Growth; Mortality; Survival; Osmotic adaptations; Crayfish culture; Pathology; Metabolism; Salinity; Ecophysiology; Astaciculture; Régulation osmotique; Reproduction; Survie; Croissance; Pathologie; Ecophysiologie; Salinité; Astacus leptodactylus; Ecrevisse.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1185.pdf

ReMoNor : Mise en place et premier bilan du Reseau Mollusque de NORmandie (1998-1999)
Provedor de dados: 5
Autores: Ropert, Michel; Blin, J.l.; Cornette, Florence; Pacary, S; Pien, S; Leganeur, E; Kopp, Joel; Richard, O.
Since 1998, a growth and quality monitoring study of reared molluscs has been developped as part of a close collaboration between the Shellfish Research Laboratory of Normandy (IFREMER Port-en-Bessin, Calvados) and the SMEL (Syndicat Mixte d'Expansion du Littoral) Experimental Centre (Blainville, Manche). REMONOR (REseau MOllusque de NORmandie) is based on the experience gained through the national monitoring network REMORA, which protocol has been entirely applied. Adults and spat of Pacific oysters Crassostrea gigas were placed in 13 stations all along the oysters rearing areas of Normandy. These oysters had the same origin and history (i.e. age and weight) until they were dispatched on the 13 stations. 4 essential criteria were used to monitor rearing...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Croissance qualité; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/rapport-2248.pdf

Mapping QTL for resistance to summer mortality in the Pacific oyster Crassostrea gigas
Provedor de dados: 5
Autores: Sauvage, Christopher; Heurtebise, Serge; De Koning, D.; Haley, Chris; Boudry, Pierre; Lapegue, Sylvie.
Summer mortalities of the Pacific cupped oyster Crassostrea gigas have been described in the literature for decades. One solution to overcome this problem would be to select animals more tolerant to summer mortalities, as this trait was shown to be highly heritable (Degrémont, 2003). Such selective breeding would strongly benefit from the identification of markers associated to the resistance to allow the development of markers assisted selection. Recently, a set of a new kinds of markers (SNPs) have been developed in the Pacific oyster. These markers were identified and characterized in several genes involved in the immune response and energetic pathways (Sauvage, 2007). In this context, the mapping of SNPs, of 16 new EST-SSR based markers and of...
Tipo: Text
Palavras-chave: Mortality; Genetic; Crassostrea gigas; Pacific oyster; Mapping QTL.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/acte-3504.pdf

Étude dynamique de la population de Nucula nucleus (bivalve, protobranche) du cap de Flamanville (Manche)
Provedor de dados: 5
Autores: Chardy, Pierre; Guillaumont, Brigitte; Hamon, Dominique.
Annual production and turnover rate of biomass are estimated on a population of the bivalve, Nucula nucleus, dominant on the sublittoral area of Cap de Flamanville (Manche). Investigations on reproductive cycle established on the gonads maturity index over one year indicate a single spawning period in autumn. Age is determined from a study of the ring pattern on the shells, in which annual signification is outlined. The Von Bertalanffy curve and the exponential function give an adequate description of growth and mortality. The studied population is considered as near a theoretical population with constant recruitment and mortality; this simplification is discussed through the comparison of the demographie structures obtained in the same station in 1978 and...
Tipo: Text
Palavras-chave: Croissance; Mortalité; Productivité; Inférence statistique; Growth; Mortality; Productivity; Statistical inference.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00113/22411/20108.pdf

REMONOR : Résultats 2002. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: 5
Autores: Simonne, Charlotte; Pien, S; Hugonnet, Virginie; Le Gagneur, Eric; Ropert, Michel; Kopp, Joel; Richard, O.
The national REMORA network is targeted on the studies of growth, flesh quality and mortality of a sample of cupped oyster Crassostrea gigasdistributed on 9 stations along the coast of Normandy. As a better precision is needed for regional purpose, 7 new stations have been added. A total number of 16 stations is now sampled from Chausey to Meuvaines. Weak rates of mortality have been noticed in 2002 on both adults (7%) and spat (6 %). These rates are the weakest ever seen. The mortality rates in the Baie des veys were less than 10 %. This rearing area shows usually a much higher mortality level. Growth rates were noticed weaker than usual. They slowly decline from 1999. From Mach to December, the growth rate of adults has been computed to 0,21 %/day (for a...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2247.pdf

Age, growth and mortality of the striped seabream   Lithognathus mormyrus   (Linnaeus, 1758) in the Gulf of Tunis (Central Mediterranean Sea)
Provedor de dados: 5
Autores: Khaldi, Asma; Chater, Ines; Elleboode, Romain; Mahé, Kelig; Chakroun-marzouk, Nadia.
Despite the high commercial value of the striped seabream Lithognathus mormyrus (Linnaeus, 1758) in the Gulf of Tunis, biological data on its age, growth and exploitation rate are lacking. With the aim of estimating growth parameters, 516 individuals, ranging from 6–27.5 cm total length and from 3.5–293.5 g total weight, were collected from the artisanal fishing fleet between February 2014 and July 2016. The somatic growth presented a positive allometry and was described by the equation TW = 6.54 10−3TL3.213. The monthly analysis of the marginal increment of the otoliths revealed that only one annulus was deposited per year. The estimated von Bertalanffy growth parameters were: L∞ = 30.18 cm, k = 0.303 year−1 and t0 = −1.42 years. Total and natural...
Tipo: Text
Palavras-chave: Age; Growth; Gulf of Tunis; Lithognathus mormyrus; Lopt; Mortality; Otolithometry; Sparidae; Weight–length relationship.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00676/78770/80945.pdf

Diversification de la production conchylicole : cultures de palourdes sur estran (Compte rendu n°4)
Provedor de dados: 5
Autores: Goulletquer, Philippe.
Winter mortalities of the manila clam rl1d1 tapes philippinarum along the french atlantic coasts : biochemical and ecophysio-logical aspects. For some years, high mortalities on Manila clam's breeding occured at the end of Winter on Atlantic coasts. The ecophysioIogicaI survey of population was performed using a ground culture technique. This permitted to characterize the conditions related with mortalities such as a loss in dry weight and a decrease of metabol ic reserves. A comparison of biochemical composition was conducted during the occurence of mortality on different sites along the Atlantic coast, and in different ecosystems (tidal land, oysters ponds).
Tipo: Text
Palavras-chave: Tidal bottom; Oyster pond; Glycogen; Ruditaoes phiIippinarum; Mortality; Estran; Claire ostréicole; Glycogène; Ruditaoes phiIippinarum; Mortalité.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/rapport-1566.pdf

Mass mortalities in hatchery-reared sea bass (Lates calcarifer) larvae associated with the presence in the brain and retina of virus-like particles
Provedor de dados: 5
Autores: Renault, Tristan; Haffner, Philippe; Baudin Laurencien, F.; Breuil, Gilles; Bonami, Jean-robert.
Since 1986, an unknown disease causing high mortalities appeared in Ifremer's Pacific OceanologicaI Center (Tahiti) nursery of sea bass (Lates calcarifer). opathology of lesions involving both centraI nervous system (CNS) and eye retina, and the tuation exists in South-East Asian countries (Indonesia, Philippines, Malaysia and Singapore), and in northem Australia.  This paper describes the histmorphology of a new fish virus, which is believed to be the aetiological agent of high mortalities among sea bass larvae.
Tipo: Text
Palavras-chave: Virus like; Lates calacrifer; Hatchery; Mortality.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-2885.pdf

Growth and mortality of the European oyster Ostrea edulis in the Bay of Arcachon (France)
Provedor de dados: 5
Autores: Robert, René; Borel, Michel; Pichot, Yves; Trut, Gilles.
A study of the growth and mortality of the European oyster Ostrea edulis , including the effects of Marteilia refringens and Bonamia ostreae , was carried out in three oceanic areas in the Bay of Arcachon from May 1989 to February 1991. One-year-old spat, free from disease were used for the trials. Six months after beginning the trials, Marteilia refringens had severely infested the cultures. Although Bonamia ostreae was found during the first year, the rate of infestation was low. In the second year bonamiasis increased and high mortality (&gt; 60%) occurred in Ostrea edulis populations. Although the growth of the oysters was good, their condition index was generally poor. Moreover, shell perforations by Polydora sp. were observed. The influence of...
Tipo: Text
Palavras-chave: Ostrea edulis; Pathologie; Mortalité; Croissance; Reproduction; Composition biochimique; Bassin Arcachon; Ostrea edulis; Pathology; Mortality; Growth; Reproduction; Gross biochemical composition; Bay of Arcachon.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00015/12600/9477.pdf

Mortalité de l'huître Crassostrea gigas dans le bassin de Marennes-Oléron: étude de la variabilité spatiale de son environnement et de sa biologie par un système d'informations géographiques (SIG)
Provedor de dados: 5
Autores: Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Razet, Daniel; Geairon, Philippe; Goulletquer, Philippe.
The summer mortality patterns was studied in 1996 on the Ronce-les-Bains oyster bank (175 ha), located on the southern part of the Bay Marennes-Oleron (Atlantic coastline). Studies on growth, sexual maturation, survival rates and environmental variables were compared at fifteen experimental sites (on- and off-bottom culture). After 7 months, cumulative mortality reached 8-19 and 23-33% for off-bottom and on-bottom culture, respectively which is significantly higher for the latter case. A seasonal mortality trend was noted, with a significant increase related to air temperature greater than 20 degrees C and with a significant pre-spawning glycogen catabolism. Based on soft tissue flesh growth results from both types of culture, several empirical models were...
Tipo: Text
Palavras-chave: Atlantic Ocean; Crassostrea gigas; Mortality; Growth rates; Océan Atlantique; Crassostrea gigas; Mortalité; Croissance.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-862.pdf

Characterization of Vibrio isolated from Crassostrea gigas spat suffering summer mortality outbreaks (slides)
Provedor de dados: 5
Autores: Gay, Melanie; Renault, Tristan; Le Roux, Frédérique.
The pathogens related to summer mortality outbreaks are a herpes virus and two bacterial strains one belonging to Vibrio splendidus biovar II and the other to Vibrio splendidus spp. However, the feature pathogen/opportunist of these strains is still unknown. Several strains belonging to the genus Vibrio have been identified as pathogen for different mollusk species. In the context of the French program Morest, experiments of cohabitation have been used to demonstrate the potential presence of a transmissible infectious agent in batches of oysters suffering from summer mortality outbreaks. More than one hundred Vibrio strains have been isolated from these experiments. These strains have been phenotypically and genotypically characterized. Their virulence...
Tipo: Text
Palavras-chave: Vibrio splendidus; Vibrio lentus; Crassostrea gigas; Summer; Spat; Pathogen; Disease transmission; Oyster culture; Mortality; Microbial contamination; Oysters.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-3343.pdf

Summer seed mortality of the Pacific oyster, Crassostrea gigas Thunberg grown in Tomales Bay, California, USA : the influence of oyster stock, planting time, pathogens, and environmental stressors
Provedor de dados: 5
Autores: Burge, Colleen; Judah, Linda; Conquest, Loveday; Griffin, Frederick; Cheney, Daniel; Suhrbier, Andrew; Vadopalas, Brent; Olin, Paul G.; Renault, Tristan; Friedman, Carolyn S.
Summer seed mortality (SSM) has occurred yearly in Tomales Bay, California since 1993. SSM has resulted in up to 90% cumulative losses, and has been associated with extreme temperature, phytoplankton blooms, and an oyster herpesvirus. In this study, three stocks of Pacific oysters were planted at three sites in California (Inner Tomales Bay, Outer Tomales Bay, and Bodega Harbor) in October of 2000 (Fall) and April of 2001 (Spring) and monitored for mortality, growth, and health status. In April of 2001, a similar study was conducted in Totten Inlet, WA state using cohorts of oysters planted in California; animals were monitored for mortality and growth. Temperature data were collected at all sites; phytoplankton abundance data were collected  at the...
Tipo: Text
Palavras-chave: California; Tomales Bay; Oyster herpesvirus; Temperature; Mortality; Crassostrea gigas; Pacific oysters.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2976.pdf

The mass mortality of blue mussels (Mytilus spp) from the Atlantic coast of France is associated with heavy genomic abnormalities as evidenced by flow cytometry
Provedor de dados: 5
Autores: Benabdelmouna, Abdellah; Ledu, Christophe.
Since 2014, France’s blue mussel industry has been facing heavy mortality outbreaks (90-100%) affecting both juveniles and adults. This report presents evidence of heavy genomic abnormalities associated with mortality outbreaks in blue mussels, Mytilus edulis-galloprovincialis, from the Atlantic coast of France. In this study, ploidy characteristics of hemic cells were investigated using Flow CytoMetry (FCM), revealing an unusual, broad continuum of ploidy distribution from hypodiploidy to tetraploidy. FCM was additionally used to evaluate, at individual and populations levels, different thresholds of genomic abnormality (GA%) using the percentage of non-diploid nuclei. Individual mussels were considered to be abnormal when more than 10% of hemocytes in...
Tipo: Text
Palavras-chave: Mussels; Mortality; Cytogenetic quality; Hemocytes; Ploidy.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00341/45171/44566.pdf

Project ROMEO : E. C. n° FA-S2 9052 - Research objectives : Mortality in European Oysters - Final Report
Provedor de dados: 5
Autores: Renault, Tristan; Arzul, Isabelle.
Crassostrea gigas is increasingly being cultured in a great number of countries from animaIs originally introduced from Japan, and is one of the most exploited bivalve species in the EU (FAO, 1989). Although no serious pathogen was detected previously in Japanese oysters in Europe, mortalities have been observed since the introduction of this bivalve species into the EU. Thus, oyster cultivation may be endangered by the occurrence of epizootics, especially virus diseases, which are considered one of the maj or risks to production. Indeed, mortalities have been described among different species of ostreids and are associated with the presence of viruses belonging to various families. The first description of a virus was reported in adult Eastern oyters,...
Tipo: Text
Palavras-chave: Pathology; Virology; Herpes-like infection; Detection; Diagnosis; Herpesviridae; Oyster; Crassostrea gigas; Mortality.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00044/15536/12915.pdf

Influence of OSHV-1 oyster mortality episode on dissolved inorganic fluxes: An ex situ experiment at the individual scale
Provedor de dados: 5
Autores: Richard, Marion; Bourreau, Juliette; Montagnani, Caroline; Ouisse, Vincent; Le Gall, Patrik; Fortune, Martine; Munaron, Dominique; Messiaen, Gregory; Callier, Myriam; Roque D'Orbcastel, Emmanuelle.
Ostreid herpesvirus 1 (OsHV-1 μvar) infection has caused significant mortalities in juvenile oysters (Crassostrea gigas). In contrast to the practices of other animal production industries, sick and dead oysters are not separated from live ones and are left to decay in the surrounding environment, with unknown consequences on fluxes of dissolved materials. A laboratory approach was used in this study to test the influence of oyster mortality episode on dissolved inorganic fluxes at the oyster interface, dissociating (i) the effect of viral infection on metabolism of juvenile oysters and (ii) the effect of flesh decomposition on oxygen consumption and nutrient releases at the individual scale. Nine batches of juvenile oysters (Individual Total wet weight...
Tipo: Text
Palavras-chave: Crassostrea gigas; Mortality; Ostreid herpesvirus 1; Juvenile; Spat; Mineralisation; Oxygen consumption; Nutrient fluxes.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00378/48973/49380.pdf

Les ages de Niphargus virei (crustace, stygobie)
Provedor de dados: 5
Autores: Turouin-buffiere, M.
The life-span of Niphargus virei is estimated with the length histograms of annual summer samples; it fits in with the data of rare spring distributions and with the growth observed in the laboratory. Increase in body wet weight confirms the low growth rate of this species (maximum: 0.06 mg/day); the mean age of populations changes on account of rainfall, which determines the drift of part of the population out of its natural habitat.
Tipo: Text
Palavras-chave: Niphargus virei; Malacostraca; Mortality; Body size; Longevity; Growth.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1396.pdf

REMONOR : Résultats 2003. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: 5
Autores: Simonne, Charlotte; Pien, S.; Hugonnet, Virginie; Le Gagneur, Eric; Ropert, Michel; Kopp, Joel; Richard, O.
The network named REMONOR (REseau MOllusqueNORmandie) aims to assess mortality, growth and tissue quality of the Pacific oyster, Crassostrea gigas, cultivated in Normandy over an annual cycle. This local network relies on the same material and methods as the national one named REMORA (REseau Mollusques Ressources Aquacoles). The study was carried out in 17 sites, which were distributed in the four basins where oyster rearing occurs in Normandy (West and East coast of Cotentin, Baie des Veys and Meuvaines). In 2003, a new site was added, which was located in the area of Ver-Sur-Mer (Calvados). The results obtained in 2003 showed a low annual mortality for adults (8%) as well as for juveniles (10%). Growth was also low for the two age classes of oyster...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/rapport-2246.pdf

The use of size and growing height to improve Crassostrea gigas farming and breeding techniques against OsHV-1
Provedor de dados: 5
Autores: Azema, Patrick; Maurouard, Elise; Lamy, Jean-baptiste; Degremont, Lionel.
Mortality associated with ostreid herpesvirus 1 (OsHV-1) has significantly impacted Crassostrea gigas farmers all around the world. Although selective breeding programs to improve OsHV-1 resistance can significantly reduce the mortality rate below 20%, husbandry practices have also been one way to limit or decrease mortality. The main objectives of this study were to describe the influence of two husbandry practices on OsHV-1-induced mortality in C. gigas spat and how different family lines respond to husbandry practices to gain a better understanding of the potential benefits of breeding management as a tool to adapt to improved practices. The first analysis investigated the importance of the size of C. gigas when challenged with OsHV-1 for the first...
Tipo: Text
Palavras-chave: Mortality; Crassostrea gigas; Size; OsHV-1; Growing height.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00366/47717/47758.pdf

Comparaison des performances d'élevage et de la vitalité de naissain d'huîtres creuses Crassostrea Gigas, en 3 sites du Morbihan (Rivière d'Auray et Baie de Quiberon), de mai 1999 à mars 2000
Provedor de dados: 5
Autores: Mazurie, Joseph; Fleury, Pierre-gildas; Claude, Serge; Hirata, Toshio; Langlade, Aime; Martin, Anne-genevieve; North, Benjamin.
Summer mortalities of young oysters have been studied in 1999 through the monitoring of a unique oyster batch distributed among 3 sites located from upstream of an estuary (Fort-Espagnol, Auray river) to downstream (Kerpenhir, Auray river) up to open bay (Men er Roué, Bay of Quiberon). Mortality and growth have been monitered in parallel with vitality indices, so as to try or identify periods of weakness of oysters. The spat grew from a mean weight of 3 g, in the beginning of May to around 35 g in November, without sharp differences between sites. The summer mortalities remained moderate (10 %) in the 2 most marine stations, whereas a light peak of mortality (15 %) was recorded in July in the most continental station. Any of the physico-chemical parameters...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Rivière d'Auray; Quiberon; Mortalité; Vitalité; Valvomètre; Force musculaire; Perte de sel; Cupped oyster; Spat; Gigas; Auray river; Of Quiberon; Mortality; Vitality; Valvometer; Muscle force; Salt loss; Hermeticity.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00025/13632/10713.pdf

Etudes sur les mortalites larvaires de la coquille st Jacques Pecten maximus en ecloserie
Provedor de dados: 5
Autores: Robert, Rene; Miner, Philippe; Nicolas, Jean-louis; Mazuret, Michel; Connan, Jean-paul.
Larval mortalities occurring in molluscan hatcheries have often been associated with bacterial contamination. Although batches of oyster and clam larvae have been routinely reared in the hatchery of Argenton without antibiotics, high larval mortalities have been recorded with Pecten maxirnus under similar conditions. For this species, an addition of chloramphenicol was found necessary. However, this chemical has now been banned in Europe. Thus either substitition products or an improvement in the rearing procedures is essential. Studies carried out have shown that neither a decrease in larval density (1 larvae. ml"l) nor sea water change frequency (1 per day) had any positive effects. Furthermore, elective substances such as sugars were not suitable and...
Tipo: Text
Palavras-chave: Mortality; Pecten maximus; Hatchery; Larvae; Mollusc; Mortalité; Pecten maximus; Ecloserie; Larve; Mollusque.
Ano: 1995
URL: https://archimer.ifremer.fr/doc/1995/rapport-1568.pdf

REseau MOllusques des Rendements Aquacoles de l'huître creuse Crassostrea gigas sur les côtes françaises (REMORA). Résultats des stations nationales et régionales dans la lagune de Thau pour l'année 2002.
Provedor de dados: 5
Autores: Le Gall, Patrik; Lagarde, Franck; Pichot, Yves; Grizel, Henri; Hamon, Pierre-yves; Vercelli, Catherine.
This report presents the main results for 2002 of the eight points in the Lagune de Thau, in accordance with the monitoring network REMORA: 3 national points and 5 regional added by the «Laboratoire Conchylicole de Méditerranée». Only adults batch is observed in the Mediterranean sea. This year the mortality ratio is low (&lt; 5 %), without significant differences between areas. Like for the whole national network, the average individual weight are less than previous years in Bouzigues and Marseillan area ; in opposite Mèze area has better results. Bouzigues area presents the best productivity rate (3.1) and the worst in the middle of the zone. The AFNOR index, calculed in December, allows to classify the oysters like "spéciales". The best values are...
Tipo: Text
Palavras-chave: REMORA; Méditerranée.; Huître creuse; Crassastrea gigas; Mortalité; Qualité; France; Lagune de Thau; Croissance; REMORA; France; Mediterranean Sea; Lagune de Thau; Crassos/rea gigas; Mortality; Growth; Quality; Polvdora sv.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00113/22385/20080.pdf

Some aspects of the abnormal mortalities of the pearl oysters, Pinctada margaritifera in the Tuamotu Archipelago, (French Polynesia)
Provedor de dados: 5
Autores: Cabral, P.
The black-lip pearl oyster Pinctada margaritifera lives and reproduces with high performance in most of Tuamotu Lagoons. Technics to collect spats, to culture juveniles and to operate oysters were quickly found and applicated. Nevertheless, the sudden rise of this activity has been correlated with an anarchic development. For instance, large occupation of areas in the lagoons, cultivation of numerous oysters in confined areas, lack of knowledge on the basis culture technics in many farms. In 1985, mass mortalities have appeared in some lagoons and 50 to 80% of cultured stock died. Some investigations have been done but no explanation was found. In 1988, the mortalities are still very high. An analysis of cooperative production results from 1979 to 1988...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Bivalvia; Spat; Juveniles; Oyster culture; Reproduction; Pearl culture; Pearl oysters; Mortality.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1484.pdf

Comparaison des performances d'élevage de moules en 4 sites mytilicoles de la baie de Vilaine, de février 2000 à février 2001
Provedor de dados: 5
Autores: Mazurie, Joseph; Bouget, Jean-francois; Claude, Serge; Fleury, Pierre-gildas; Langlade, Aime.
Mussel samples have been placed in plastic-mesh bags hung on wood poles (« bouchots »), at 4 locations of a mussel culture area in the bay of Vilaine (South Brittany, France). They have been monitored for one year, from February 2000 to February 2001. The recorded growth have been rather fast (plus 1.2 g per month between April and September), and mortalities moderate (between 15% to 25%), with better results in southern stations, further from the estuary.  Among the physico-chemical parameters recorded, the most striking were very low salinities (below 10 g/l) recorded for days, after heavy rains. They provoqued a valve closure of mussels (recorded by a « valvometer »). Some physiological indicators being tested (muscle force and hermeticity) seemed to...
Tipo: Text
Palavras-chave: Valve movements; Hermeticity; Muscle strength; Mortality; Growth; South Brittany; Bay of Vilaine; Mytilus edulis; Mussel; Écartements valvaires; Herméticité; Force musculaire; Mortalité; Croissance; Bretagne sud; Baie de Vilaine; Mytilus edulis; Moule.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-6373.pdf

Fluctuating asymmetry and mortality in cultured oysters (Crassostrea gigas) in Marennes-Oleron basin
Provedor de dados: 5
Autores: Frechette, Marcel; Goulletquer, Philippe; Daigle, Gaétan.
Japanese cupped oysters suffer summer mortality in many culture sites along the French Atlantic coast. To ascertain whether mortality might be associated with morphological features of the shells, we estimated fluctuating asymmetry (FA) of hatchery/nursery-produced oysters kept in culture bags in the intertidal. FA is defined as random variations from a perfect symmetry plane (bilateral or radial) in some morphological trait. FA increases with disruption of homeostasy during ontogeny and has both genetic and environmental determinants. We found significant differences in FA between dead and live oysters in two of our three study groups. Therefore, lack of developmental stability may be involved in the summer mortality syndrome of oysters. We also found...
Tipo: Text
Palavras-chave: Oyster; Mortality; Fluctuating asymmetry; Aquaculture.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-575.pdf

Les mortalités d'ormeaux en Bretagne nord en 1998: synthèse des observations et analyses
Provedor de dados: 5
Autores: Mazurie, Joseph; Thebault, Anne; Le Mao, Patrick; Veron, Gerard; Tige, Gilbert; Richard, Olivier.
Des mortalités anormales d'ormeaux ont été signalées en Bretagne nord (départements d'Ille et Vilaine et Côtes d'Armor) à partir du mois d'août 1998 et porté atteinte à la pêcherie professionnelle de cette zone. Des mortalités de même type avaient été signalées en Bretagne Sud, l'année précédente. Les mortalités de 1998 ont épargné le secteur plus à l'ouest (le Finistère) et plus à l'est (la Normandie). Une estimation précise n'a pas été entreprise, mais les pertes signalées par endroits dépassent 50% du stock. Les ormeaux atteints, de toutes tailles, ne présentent pas de symptôme particulier. Les analyses histologiques réalisées en priorité n'ont pas révélé d'agent infectieux. Toutefois, dans le doute et devant le caractère évolutif du phénomène, une...
Tipo: Text
Palavras-chave: Ormeau; Mortalité; Côtes d'Armor; Ille-et-Vilaine; Abalone; Mortality.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00105/21666/19244.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; Résultats des stations nationales. Année 2000
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Cornette, Florence; Claude, Serge; Palvadeau, Hubert; Robert, Stéphane; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine.
The monitoring network IFREMER /REMORA is assessing, on a yearly basis, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year old ; and "adults" = two-years old), distributed among various stations of the main French oyster areas. Samplings are carried out in March, June, September and December. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. With the exception of Spring mortalities due to poor initial quality of adult oysters and to difficulties in the counting of juveniles, the year 2000 appeared to be a year of low mortality. 2000 is a year of poor growth (61.5 g in average weight in...
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Cupped (gigas) oyster; France; REMORA; Polydora; Qualité; Croissance; Mortality; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-1635.pdf

Croissance, engraissement et mortalité de l'huître creuse Crassostrea gigas en baie de Bourgneuf  : comparaison de quatre secteurs ostréicoles
Provedor de dados: 5
Autores: Haure, Joel; Baud, Jean-pierre.
A study on mortalities, growth and fattening of the oyster Crassostrea gigas was carried out spring with the autumn 1987 in four sites of bay of Bourgneuf. Mortalities, more important in spring, prove to be higher in the sectors North compared to the Southern sectors of bay of Bourgneuf.  The performances of growth are rather weak when they are compared with other French oyster sectors. They however present a better production in the cattle-breeding areas located at the South of bay. The spring phase is marked by the formation of glucidic reserves, at the moment of the reheating of water, which is quickly transformed, in the majority of the sites, in lipids of reserves of the ovocytes, during the gamétogenèse.   The state of fattening of Crassostrea gigas...
Tipo: Text
Palavras-chave: Fattening; Oyster; Mortality; Growth; Bay of Bourgneuf; Crassostrea gigas; Engraissement; Huitre; Mortalité; Croissance; Baie de Bourgneuf; Crassostrea gigas.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-1646.pdf

Juvenile oyster disease (JOD) in American oysters, Crassostrea virginica, reared in France. Detection of abnormal calcium deposits in gill and mantle tissues
Provedor de dados: 5
Autores: Renault, Tristan; Cochennec, Nathalie; Chollet, Bruno; Maffart, Patricia.
Progeny of Crassostrea virginica oysters, introduced into France in 1992, were reared during 1992 and 1993, to test their growth performances. These assays were performed to investigate the possible replacement of Crassostrea gigas with a non indigenous species, Crassostrea virginica. During the summer of 1993, sporadic mass mortalities (80-90%) occurred among young, Crassastrea virginica, oysters reared in the IFREMER nursery in La Tremblade (Charente Maritime).
Tipo: Text
Palavras-chave: Histology; Crassostrea virginica; Mortality; Oysters.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-2975.pdf

Mass mortalities of Pacific oysters Crassostrea gigas reflect infectious diseases and vary with farming practices in the Mediterranean Thau lagoon, France
Provedor de dados: 5
Autores: Pernet, Fabrice; Barret, Jean; Le Gall, Patrik; Corporeau, Charlotte; Degremont, Lionel; Lagarde, Franck; Pepin, Jean-francois; Keck, Nicolas.
Experiments were conducted to investigate the effects of farming sites, seeding date, age of oysters, ploidy level and rearing structures on mortality, pathogens and energetic reserves of oysters Crassostrea gigas. Mortality of oysters coincided with infections involving, primarily, the ostreid herpesvirus OsHV-1 and, secondarily, bacteria of the group Vibrio splendidus, when seawater temperature was between 17 and 24°C. Mortality started in early May and lasted until late September, with an interruption in July and August when seawater temperatures rose above 24°C. Mortality varied with farming site: oysters maintained in the open Mediterranean Sea showed no mortality and OsHV-1 was occasionally detected at a low level only, while oysters maintained in...
Tipo: Text
Palavras-chave: Pacific oyster; Mortality; Disease; Farming practices; Hydrodynamics; Energetic.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00086/19739/17379.pdf

Mortality associated with OsHV-1 in spat Crassostrea gigas: role of wild-caught spat in the horizontal transmission of the disease
Provedor de dados: 5
Autores: Degremont, Lionel; Benabdelmouna, Abdellah.
The French oyster production of Crassostrea gigas is based on two sources of spat: wild-caught (WC) and hatchery-produced (HP). Massive mortality related to the ostreid herpesvirus type 1 (OsHV-1) has affected both sources in France since 2008. We investigated the mortality in juvenile C. gigas due to the horizontal transmission of OsHV-1 within (separated condition) and between (mixed condition) the two spat sources in three environments from April to June 2010. In the separated condition, no mortality was observed in the HP batches, while the WC batches experienced moderate to high mortality (40–80 %). In contrast, the WC and HP batches experienced high mortality in all tested environments for the mixed condition. At the beginning of the trial, the HP...
Tipo: Text
Palavras-chave: Crassostrea gigas; Wild-caught; Hatchery-produced; Spat; Mortality; Horizontal transmission; Ostreid herpesvirus OsHV-1.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29921/28387.pdf

Episodes de mortalité massive de moules bleues observés en 2014 dans les Pertuis charentais
Provedor de dados: 5
Autores: Bechemin, Christian; Soletchnik, Patrick; Polsenaere, Pierre; Le Moine, Olivier; Pernet, Fabrice; Protat, Martin; Fuhrmann, Marine; Quere, Claudie; Goulitquer, Sophie; Corporeau, Charlotte; Lapegue, Sylvie; Travers, Marie-agnes; Morga, Benjamin; Garrigues, Manon; Garcia, Celine; Haffner, Philippe; Dubreuil, Christine; Faury, Nicole; Baillon, Laury; Baud, Jean-pierre; Renault, Tristan.
Mass mortality outbreaks (90-100%) in both juvenile and adult blue mussels were reported in 2014 along the Pertuis Charentais area of the French Atlantic coast. A series of studies were carried out to learn more about the phenomenon through detecting pathogens, describing environmental conditions and establishing the physiological status of the animals. Bacteria identif ied as belonging to the V. splendidus species were detected in dying mussels and seem able to cause mortality in blue mussels in the laboratory. Unusual environmental conditions (large amounts of fresh water, re-suspension of sediments during a series of storms, and a high renewal rate of specific water masses in Brittany’s Pertuis area) may be partially responsible for sparking the phenomen
Tipo: Text
Palavras-chave: Mortalités; Moules; Pertuis Charentais; Vibrio splendidus; Environnement; Mortality; Mussels; Pertuis Charentais; Vibrio splendidus; Environment.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00312/42343/41682.pdf

ReMoNor : Résultats 2001
Provedor de dados: 5
Autores: Cornette, Florence; Blin, J.l.; Pien, S; Simonne, Charlotte; Kopp, Joel; Richard, O.
The regional network REMONOR showed 2001's characteristics of growth and quality of oysters (Crassostrea gigas) in the three rearing areas of Normandy. Compared to year 2000, two additional stations along the East Coast have been settled. The summer adults mortalities have been registered between 0 % and 25 %. The average for all the rearing areas reached 6 %. Highest rates have been noticed in the Baie des Veys and the East Coast. The juvenile's mortality occurred during the same season, in summer. This year 2001 is included in lower growth years in all Normandy. This year, the West Coast growth rate appeared to be quit unusual. For the first time growth rates were in the average in the northern area that usually shows very bad performance. We can...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-2249.pdf

Effects of temperature on herpes-like virus detection among hatchery-reared larval Pacific oyster Crassostrea gigas
Provedor de dados: 5
Autores: Le Deuff, Rose-marie; Renault, Tristan; Gerard, Andre.
This paper describes effects of temperature on herpes-like virus detection in Pacific oyster Crassostrea gigas larvae held at different temperatures. Intranuclear, intracytoplasmic and extracellular viral particles were observed in velum and mantle connective tissues of oyster larvae reared at 25-26°C. In larvae held at 22-23OC, although nuclear lesions were observed, the presence of viral particles was not detected. Results were obtained for oyster larvae with 4 different parental origins. Herpesvirus infection was found in 3 of the 4 groups of oyster larvae held In the same conditions at the higher temperature.
Tipo: Text
Palavras-chave: Temperature; Mortality; Larval culture; Crassotrea gigas; Pacific oyster; Herpesvirus.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/publication-2900.pdf

Resistance to OsHV-1 Infection in Crassostrea gigas Larvae
Provedor de dados: 5
Autores: Dégremont, Lionel; Morga, Benjamin; Trancart, Suzanne; Pépin, Jean-francois.
The ostreid herpesvirus(OsHV-1) is one of the major diseases that affect the Pacific oyster Crassostrea gigas. Selective breeding programs were recently shown to improve resistance easily to OsHV-1 infections in spat, juvenile, and adult oysters. Nevertheless, this resistance has never been investigated in larvae, whereas this developmental stage has crucial importance for the production of commercial hatcheries, as well as explaining the abundance of spatfall. A first trial tested several viral suspensions at several concentrations using contaminated water with OsHV-1 in 4- and 10-day-old larvae that we reproduced from an unselected broodstock. In follow up on the results, one viral suspension at a final concentration of 10+6 OsHV-1 DNA copies per L was...
Tipo: Text
Palavras-chave: Larvae; Crassostrea gigas; OsHV-1; Disease resistance; Mortality.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00313/42441/41796.pdf

REMONOR : résultats 2005. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: 5
Autores: Mary, Charlotte; Pien, S; Blin, J.l.; Ropert, Michel.
The regional monitoring network REMONOR, relying on the experience of IFREMER's REMORA national network, each year assesses the mortality, growth and quality for two age classes ("adults" = 2 years and "juveniles" = 1 year) of cup oysters, distributed among various farm sites in the main oyster farming sectors of Lower Normandy.  This network, led in collaboration by LERN (Environment Resources Laboratory) and SMEL (Coastline Installations Public-Private Entity), this year welcomes a new farm site in Veules les Roses, in Seine Maritime (76), bringing to 18 the total number of monitored sites. For operational reasons, a reduced monitoring protocol was conducted in 2005 on this last farm site, which will not take on the network's standardised protocol until...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2212.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; résultats des stations NATIONALES ; Année 2002
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Simonne, Charlotte; Claude, Serge; Palvadeau, Hubert; Guilpain, Patrice; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine; Pien, S.
The monitoring network IFREMER /REMORA is assessing, on a yearly basis two oyster batches ("juveniles" = one-year old ; and "adults" = two-years old), distributed among various stations of the main French oyster areas. Samplings are carried out in March, June, September and December. In this way this network assess seasonal mortality, growth and quality of cupped oysters, in which it is a tool for trend estimations, and then for ecosystem management or scientific studies. However, it must not be considered as an accurate estimation of professional oyster ongrowings. 2002 has been a year of very few mortality (6% in average for "adults" and 11% for juveniles). Only 2 batches were over 15% mortality. The mortality is a bit higher in juveniles batches' with 5...
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Cupped (gigas) oyster; France; REMORA; Polydora; Qualité; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2439.pdf

Réseau national de suivi des performances de l'huître creuse (Crassostrea gigas). Synthèse des résultats des stations nationales REMORA. Année 2006
Provedor de dados: 5
Autores: Bedier, Edouard; Claude, Serge; Simonne, Charlotte; D'Amico, Florence; Palvadeau, Hubert; Guilpain, Patrice; Le Gall, P; Pien, S.
En 2006, le cheptel d'origine d'huîtres adultes présentait un poids moyen individuel de 28,8g. La mise à l'eau s'est effectuée entre le 13 et le 17 mars 2006 sur les stations Manche et Atlantique et le 20 mars en Méditerranée. Au niveau national, la croissance observée en 2006 pour les adultes s'avère bonne, avec des valeurs supérieures à la moyenne en Normandie (+9,6%), en Bretagne Nord (+24,7%) et dans les Pays de la Loire (+11,7%). En revanche, les performances sont médiocres dans le bassin d'Arcachon (-13,3%). En Méditerranée, le poids atteint en décembre est plus faible que la normale (-8,5%), en raison des conditions de malaïgues qui ont prévalu sur l'étang de Thau. Sur les autres secteurs, les croissances sont moyennes. Les mortalités observées chez...
Tipo: Text
Palavras-chave: Remora; Qualité; Croissance; Mortalité; Basse Normandie; Remonor; Huître creuse; Crassostrea gigas; Remora; Quality; Growth; Mortality; Normandy; Remonor; Cupped (gigas) oyster; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3642.pdf

Genetic and reproduction strategy in Crassostrea gigas mortality
Provedor de dados: 5
Autores: Moal, Jeanne; Bedier, Edouard; Fleury, Pierre-gildas; Langlade, Aime; Le Coguic, Yvette; Degremont, Lionel; Boudry, Pierre; Le Coz, Jean-rene; Pouvreau, Stephane; Enriquez-diaz, M.; Lambert, Christophe; Quere, Christele; Soudant, Philippe; Samain, Jean-francois.
Bi-parental families were produced in hatchery and tested in the field in 2001. Two sets of 5 families were constituted, selected on their high (R) and low (S) survival. These two sets were reared in Brittany from March to November 2002. Samplings were performed twice a month to obtain data on biometry, survival, reproductive cycle, biochemical composition, adenylate energy charge, hemolymph parameters (ions and defense system) and muscle strength. "R" and "S" oysters exhibited different reproductive effort and spawning strategy. "R" oysters allocated less energy in gonad than "S" ones and presented a complete spawning at the end of August contrary to the "S" which spawns partially. Mortality started in July when the seawater temperature reached 19 degree...
Tipo: Text
Palavras-chave: Summer; Reproduction; Oyster culture; Mortality; Genetic diversity; Commercial species; Breeding.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-3345.pdf

Characterization of Vibrio isolated from Crassostrea gigas spat suffering summer mortality outbreaks
Provedor de dados: 5
Autores: Gay, Melanie; Renault, Tristan; Le Roux, Fredérique.
The French oyster production is mainly based on the pacific oyster, Crassos/rea gigas. However, for several years, C. gigas spat has suffered severe mortality outbreaks. A multifactorial etiology implicating environment, oyster physiology, genetics and pathogens is heavily suspected. A herpesvims and bacteria belonging to the Vihrio s\p/endidus polyphyletic group have been isolated From summer mortality outbreaks. Moreover, several strains belonging to the genus Vibrio have been identified as pathogen for different mollusk species. However, few tools are available for the identification of these Vibrios and for the characterization of the virulence of the pathogenic strains.
Tipo: Text
Palavras-chave: Mortality; Vibrio splendidus; Crassostrea gigas.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/acte-2854.pdf

Bilan des travaux de la cellule zoosanitaire de La Trinité Sur Mer. Réseau de Pathologie des Mollusques.  Secteurs Nord-Loire. Année 1998
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Tige, Gilbert; Hirata, Toshio; Kuntz, Gregoire; Le Coguic, Yvette.
Within the context of the mollusc pathology monitoring network, this report assesses the follow-up and work done by the zoosanitary unit of Trinité-sur-Mer on the whole of the French farming and bed areas of the North Loire for the year 1998.
Tipo: Text
Palavras-chave: Herpes virus; Pathology; Mortality; Britanny (France); Normandy; Clam; Abalone; Cockle; Mussel; Pacific cupped oyster; European flat oyster; Herpès virus; Pathologie; Mortalité; Bretagne; Normandie; Naissain; Palourde; Ormeau; Coque; Moule; Huître creuse; Huître plate.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1920.pdf

Participatory case definition between stakeholders and implication for early detection: a case study of the oyster production in France
Provedor de dados: 5
Autores: Lupo, Coralie; Osta Amigo, Axel; Marce, Clara; Prou, Jean.
Aquatic animal health surveillance is notably based on the observation of any increased shellfish mortality by shellfish farmers and its immediate mandatory notification to the local competent authority. According to current EU regulation, increased mortality is defined using a participatory approach: case reporting is based on individual farmer perception, which then can be turned into notification in cooperation between the farmer and the competent authority. All the challenge relies on starting from individual perception and knowledge of increased mortality to a collective alert onset informing potential control actions having a community interest. We made an inventory of the criteria used by surveillance stakeholders to define and detect increased...
Tipo: Text
Palavras-chave: Aquatic animal surveillance; Mortality; Shellfish; Early warming surveillance; Case definition.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00195/30600/29057.pdf

Bilan des connaissances sur la qualité de l'eau dans la zone du polder conchylicole de Bouin - Projet LEAUPOLD
Provedor de dados: 5
Autores: Hatt, Philippe-jacques; Stavrakakis, Christophe; Buchet, Vincent; Dupuy, Beatrice.
Le polder conchylicole de Bouin (Vendée) est le principal bassin français de production de naissains d’huîtres creuses issus d’écloseries. Depuis 2007, et malgré l’installation de dispositifs de traitement de l’eau, des anomalies dans les élevages voire des mortalités affectent la production des écloseries et nurseries du secteur, ainsi que celle de microalgues en grand volume d'une entreprise spécialisée. Les observations des professionnels orientent la recherche de la cause de ces mortalités sur les contaminants chimiques, notamment les pesticides utilisés par l'agriculture, dont les exploitations du polder agricole, qui jouxtent le polder conchylicole. Comme l'ont montré de nombreux travaux, certains de ces produits altèrent la qualité de l’eau de mer...
Tipo: Text
Palavras-chave: Bassin Loire-Bretagne; Baie de Bourgneuf; Environnement; Conchyliculture; Qualité de l'eau; Pollution chimique; Bassin versant; Mortalité; Zone côtière; Loire-Bretagne district; Bourgneuf bay; Environment; Shellfish aquaculture; Water quality; Chemical pollution; Watershed; Mortality; Coastal zone.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00280/39165/37726.pdf

Mortalité hivernale chez la palourde japonaise Ruditapes philippinarum sur le littoral atlantique : aspects biochimique et écophysiologique
Provedor de dados: 5
Autores: Goulletquer, Philippe.
For some years, high mortalities on Manila clam's bredding occured at the end of winter on Atlantic coasts. The ecophysiological survey of population was performed using a ground culture technique. This permitted to characterize the conditions related with mortalities such as a loss in dry weight and a decrease of metabolic reserves. A comparison of biochemical composition was conducted during the occurence of mortality on different sites along the Atlantic coast, and in different ecosystems (tidal land, oysters ponds).
Tipo: Text
Palavras-chave: Tidal bottom; Oyster pond; Glycogen; Ruditapes philippinarum; Mortality; Estran; Claires ostréicoles; Glycogène; Ruditapes philippinarum; Mortalité.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/publication-3019.pdf

The impact of harmful algal blooms on finfish. Mortality, pathology and toxicology
Provedor de dados: 5
Autores: Brusle, Jacques.
Many algal blooms ("red tides" or "brown tides") may be noxious for finfish, either causing anoxia through decay process, clogging the gills or producing specific toxins. Since the 1970's, records of the incidence of injury and mortality to wild and cultured fish due to toxic phytoplankton have increased. It was even demonstrated that toxic algal blooms are spreading in intensity, geographic distribution and number of algal species involved. Thus, algal blooms are becoming one of the major economic threat to fisheries and fish culture industry. This review deals with the literature available (more than 250 references) on the occurrence of fish kills associated with worldwide algal blooms. Their negative effects on fish that result in economic losses are...
Tipo: Text
Palavras-chave: Harmful algal bloom; Finfish; Toxicology; Pathology; Mortality.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/rapport-1431.pdf

Technical mitigation measures for sharks and rays in fisheries   for tuna and tuna-like species: turning possibility into reality
Provedor de dados: 5
Autores: Poisson, Francois; Abascal Crespo, Francisco; Ellis, Jim R.; Chavance, Pierre; Pascal, Bach; Santos, Miguel. N.; Seret, Bernard; Korta, Maria; Coelho, Rui; Ariz, Javier; Murua, Hilario.
Tuna fisheries have been identified as one of the major threats to populations of other marine vertebrates, including sea turtles, sharks, seabirds and marine mammals. The development of technical mitigation measures (MM) in fisheries is part of the code of conduct for responsible fisheries. An in-depth analysis of the available literature regarding bycatch mitigation in tuna fisheries with special reference to elasmobranchs was undertaken. Studies highlighting promising MMs were reviewed for four tuna fisheries (longline, purse seine, driftnets and gillnet, and rod and line – including recreational fisheries). The advantages and disadvantages of different MMs are discussed and assessed based on current scientific knowledge. Current management measures for...
Tipo: Text
Palavras-chave: Mitigation; Elasmobranch; Bycatch; Pelagic; Mortality; Tuna regional fishery management organizations.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00364/47474/47493.pdf

Enzymatic polymorphism study as help for constitution of initial broodstock for a new cultivated finfish species.
Provedor de dados: 5
Autores: Renno, J; Luquet, P.
Leporinus friderici is a South American promising species for fish culture. In French Guiana the "morphological species", L. friderici, L. granti, L. lebaili and L. affinis steyermarki are found. Their identification is sometimes difficult on usual criterion. To constitute an initial broodstock of L. friderici from local wild populations, the genetic structure of these species was studied. Fifteen enzyme systems, representing twenty loci, were screened.
Tipo: Text
Palavras-chave: French Guiana; Leporinus; Leporinus granti; Leporinus friderici; Anostomidae; Pisces; Embryos; Mortality; Genetics; Freshwater fish; Rearing; Breeding; Biopolymorphism; Brood stocks; Enzymatic activity.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1441.pdf

Effect of ploidy on the mortality of Crassostrea gigas spat caused by OsHV-1 in France using unselected and selected OsHV-1 resistant oysters
Provedor de dados: 5
Autores: Degremont, Lionel; Ledu, Christophe; Maurouard, Elise; Nourry, Max; Benabdelmouna, Abdellah.
The effect of ploidy on the mortality of Crassostrea gigas spat caused by the ostreid herpesvirus (OsHV-1) genotype μVar was investigated at five sites along the Atlantic coast in France in 2011. Sibling diploids and triploids were produced using either unselected or selected OsHV-1-resistant oysters. No significant interactions were found between the factors of environment, genotype and ploidy at the endpoint dates. The mean mortality rates at the sites were 62 and 59% for diploids and triploids, respectively, and the two rates were not significantly different. The mean mortality rates were 33 and 32% for sibling diploids and triploids, respectively, when OsHV-1-resistant parents were used, and 91 and 85%, respectively, when unselected parents were used....
Tipo: Text
Palavras-chave: Diploid; Triploid; Mortality; Crassostrea gigas; Ostreid herpesvirus OsHV-1.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00199/31028/29427.pdf

Mortalité hivernale chez la palourde japonaise Ruditapes philippinarum sur le littoral atlantique : aspects biochimique et écophysiologique
Provedor de dados: 5
Autores: Goulletquer, Philippe.
For some years, high mortalities on Manlia clam's breeding occured at the end of winter on Atlantic coasts. The ecophysiological survey of population was performed using a ground culture technique. This permitted to characterize the conditions related with mortalities such as a loss in dry weight and a decrease of metabolic reserves. A comparison of biochemical composition was conducted during the occurence of mortality on different sites along the Atlantic coast, and in different ecosystems (tidal land, oysters ponds).
Tipo: Text
Palavras-chave: Mortalité; Ruditapes philippinarum; Glycogène; Claires ostréicoles; Estran; Mortality; Ruditapes philippinarum; Gycogen; Oyster pond; Tidal bottom.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00134/24517/22546.pdf

Descriptions of Mikrocytos veneroïdes n. sp. and Mikrocytos donaxi n. sp. (Ascetosporea: Mikrocytida: Mikrocytiidae), detected during important mortality events of the wedge clam Donax trunculus Linnaeus (Veneroida: Donacidae), in France between 2008 and 2011
Provedor de dados: 5
Autores: Garcia, Celine; Haond, Christophe; Chollet, Bruno; Nerac, Mirella; Omnes, Emmanuelle; Joly, Jean-pierre; Dubreuil, Christine; Serpin, Delphine; Langlade, Aime; Le Gal, Dominique; Terre-terrillon, Aouregan; Courtois, Olivier; Guichard, Benjamin; Arzul, Isabelle.
Background: Microcell parasites are small intracellular protozoans mostly detected in molluscs and can be associated with mortalities. In 2010 and 2011, strong increases in mortality events were reported in different wild beds of the wedge clam Donax trunculus Linnaeus, along the Atlantic coast of France and the presence of potential pathogens, including microcells, was investigated. Methods: Clams collected in different beds showing mortality were examined by histology. Based on histological observations, confirmatory analyses were carried out, including transmission electron microscopy (TEM) and molecular characterization. Results: Histological analyses revealed the presence of small protozoans similar to microcell parasites in different tissues of Donax...
Tipo: Text
Palavras-chave: Mikrocytos veneroides n. sp.; Mikrocytos donaxi n. sp.; Donax trunculus; Mortality; Microcell parasite.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00428/53989/55149.pdf

Déclin de la taille-aux-âges des sardines (Sardina pilchardus) : diminution de la croissance et/ou disparition sélective des individus à croissance rapide
Provedor de dados: 5
Autores: Gentil, Claire.
In many exploited species, we see a decrease of size-at-ages. Two main hypotheses have been proposed to explain this decline: a decline in growth and the selective mortality of the individuals with fast growth both being due to environmental changes or/and to fishing. The sardine Sardina pilchardus of the Bay of Biscay is a good model for the study of this phenomenon because of its high sensitivity to the environmental variations and it sustains two large French and Spanish fisheries. The aim of this study is to measure the changes in the growth of sardines, by the reading of otoliths, and to understand mechanisms involved in this process. The main stages of this study are described in this report: extraction of otoliths during PELGAS, otoliths...
Tipo: Text
Palavras-chave: Sardina pilchardus; Golfe de Gascogne; Otolithes; Croissance; Mortalité; Sélection; Sardina pilchardus; Bay of Biscay; Otoliths; Growth; Mortality; Selection.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00459/57038/58942.pdf

Assessments of natural mortality of cultivated oysters (Crassostrea gigas) in the bay of Marennes-Oleron (France)
Provedor de dados: 5
Autores: Bodoy, Alain.
The natural mortality of oysters could by considered, in a man controlled ecosystem, as the result of the action of biological factors, and human factors other then the harvest of the population. Such mortalities need to be estimated in order to be used in population dynamics, as a tool for management purposes. ln Marennes-Oleron bay, different ways of estimating the natural mortality are available. Several oyster farms were monitored for assessing growth, mortality and production in rearing conditions. Furthermore, an experimental framework which includes 15 stations gave an appraisal of the same factors under controlled conditions. Finally, another estimate will be soon available by comparin9 the number of recruited oysters, and the number of oyster...
Tipo: Text
Palavras-chave: Marennes Oleron; Mortality; Crassostrea gigas; Oysters.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-2962.pdf

Bilan de l'état zoosanitaire des mollusques en Méditerranée française : 1988-2001
Provedor de dados: 5
Autores: Pichot, Yves.
The fact that molluscs from the Mediterranean have benefited from a privileged zoosanitary condition compared to those of the other French coasts has for a long time limited the control of farms and natural fields in this area. It is only in the early 70's, because of the pathological problems and risks observed in other areas that Mediterranean molluscs started to be stictly under zoosanitory control. This control was however limited until the early 90's. With the implementation of the European directives 91/67 and 95/70 for the protection of molluscs against diseases and their propagation, with the creation in 1992 of REPAMO- IFREMER (with a watch unit in the Mediterranean), the control of molluscs in the Mediterranean has considerably improved. Since...
Tipo: Text
Palavras-chave: Méditerranée; Zoosanitaire; Mortalité; Huître plate; Ostrea edulis; Huître creuse; Crassostrea gigas; Moule; Mytilus galloprovincialis; Palourde; Tapes decussatus; Telline; Donas trunculus; Mediterranean; Zoosanitary; Mortality; Flat oyster; Ostrea edulis; Pacific cupped oyster; Crassostrea gigas; Mussel; Mytilus galloprovincialis; Clam; Tapes decussatus; Coquina clam; Donax trunculus.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00145/25579/23717.pdf

Synthesis of the “PLAN DE SAUVEGARDE” using selected all-triploid oysters to reduce the shortage of spat in France due to OsHV-1–associated mortality in Crassostrea gigas
Provedor de dados: 5
Autores: Dégremont, Lionel; Maurouard, Elise; Ledu, Christophe; Benabdelmouna, Abdellah.
Due to massive mortality of Crassostrea gigas spat in France since 2008, a “plan de sauvegarde” was set up from 2011 to 2014 (hereafter referred to as PS1 to PS4), in order to reduce the shortage of spat. This plan involved the participation of commercial hatcheries, the French Research Institute for Exploitation of the Sea (Ifremer), and the Direction des Pêches Maritimes et de l'Aquaculture (DPMA) of the French Ministry of Agriculture. It was based on selecting diploid lines of C. gigas for their higher resistance to the oyster herpesvirus OsHV-1 (2nR group), and one of these lines was subsequently tetraploidized (4nR group). Both the 2nR and 4nR groups were produced by Ifremer, and then transferred to commercial hatcheries that produced the selected...
Tipo: Text
Palavras-chave: Triploids; Mortality; Crassostrea gigas; OsHV-1; Disease resistance.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00484/59596/62598.pdf

Rapport d'activités 2003 de la station Ifremer de la Tremblade
Provedor de dados: 5
Shellfish research laboratory in Pertuis Charentais (France) present the main results concerning its activity during the year 2003. Water quality monitoring, growth, mortality and condition indices are performed on oysters ansd mussels all along the year. Shellfich stock assessment and its spatial distribution, summer mortalities events are the main research topics developped
Tipo: Text
Palavras-chave: Stock; Mortality; Growth; Hydrology; Mussel culture; Stock; Mortalité; Croissance Organisme; Hydrologie; Conchyliculture.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-333.pdf

Etude des freins et des leviers à la déclaration obligatoire des mortalités d'huîtres creuses dans les pertuis charentais
Provedor de dados: 5
Autores: Lupo, Coralie; Osta Amigo, Axel.
Objectifs -  Les objectifs de cette étude étaient (i) estimer la sensibilité du dispositif actuel de déclaration obligatoire des mortalités d’huîtres dans les pertuis charentais et son évolution entre 2007 et 2010, (ii) documenter le niveau de connaissance, les pratiques et les attitudes des ostréiculteurs et identifier les facteurs influençant le processus de déclaration.  Matériel et Méthode -  (i) La sensibilité du dispositif de déclaration obligatoire des mortalités d’huîtres a été estimée en Charente-Maritime au cours de la période 2007-2010, par la méthode de capture-recapture à deux sources. (ii) Deux échantillons d’ostréiculteurs non déclarants (31 cas) et déclarants (89 témoins) ont été inclus dans l’étude par tirage au sort dans la liste des...
Tipo: Text
Palavras-chave: Huitres creuses; Mortalité; Déclaration obligatoire; Epidémiosurveillance; Pacific oyster; Mortality; Mandatory notification; Surveillance.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00143/25444/23600.pdf

Revue systématique de la littérature relative aux facteurs de risque de mortalité des moules exploitées en France
Provedor de dados: 5
Autores: Lupo, Coralie; Le Bouquin, Sophie.
La recherche bibliographique maximalisée réalisée dans le cadre de cette revue systématique de la littérature a permis de décrire le paysage de la connaissance existante sur les facteurs de risque de mortalité des espèces de moules M. edulis et M. galloprovincialis. Ces travaux ont abouti à la formalisation d’une méthodologie rigoureuse, transparente et reproductible pour la réalisation de revue systématique relative aux facteurs de risque de mortalité chez les coquillages marins. Cette revue a décrit la diversité des définitions de la mortalité des moules et ses facteurs de risque. Elle a également permis d’apprécier la quantité et la qualité des preuves recensées. Cette revue systématique a recensé 125 facteurs étudiés pour leur relation avec la...
Tipo: Text
Palavras-chave: Mollusques marins; Coquillages bivalves; Moules; Mytilus edulis; Mytilus galloprovincialis; Mortalité; Facteurs de risque; Epidémiologie; Revue systématique; Bibliographie; Marine molluscs; Bivalve shellfish; Mussels; Mytilus edulis; Mytilus galloprovincialis; Mortality; Risk factors; Epidemiology; Systematic review; Bibliography.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59916/63099.pdf

A continuous model of biomass size spectra governed by predation and the effects of fishing on them
Provedor de dados: 5
Autores: Benoit, Eric; Rochet, Marie-joelle.
A new time-dependent continuous model of biomass size spectra is developed. In this model, predation is the single process governing the energy flow in the ecosystem, as it causes both growth and mortality. The ratio of predator to prey is assumed to be distributed: predators may feed on a range of prey sizes. Under these assumptions, it is shown that linear size spectra are stationary solutions of the model. Exploited fish communities are simulated by adding fishing mortality to the model: it is found that realistic fishing should affect the curvature and stability of the size spectrum rather than its slope.
Tipo: Text
Palavras-chave: Predation; Mortality; Growth; Biomass size spectrum; Allometry.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-665.pdf

Les risques conchylicoles en Baie de Quiberon. Troisième partie : le risque d’hypoxie pour l’huître creuse Crassostrea gigas. Rapport final du projet Risco 2010-2013
Provedor de dados: 5
Autores: Stanisiere, Jean-yves; Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Gabellec, Raoul; Retho, Michael; Quinsat, Kevin; Leclerc, Emilie; Cugier, Philippe; Dussauze, Morgan; Menesguen, Alain; Dumas, Franck; Gohin, Francis; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Goubert, Evelyne; Dreano, Alain.
The project “Risco”, supported by the “Pôle Mer” and funded by the Regional Council of Brittany, deals with specific risks of mortality of oysters, Crassostrea gigas, cultivated on the bottom, in a subtidal bay of South Brittany : the bay of Quiberon (56, France). Massive mortalities of oysters were reported in summer 2006 in this bay, exclusively located in the deep muddy area with a positive gradient eastward. A validated biogeochemical model was applied in order to simulate the dissolved oxygen over 2000-2006 : it revealed several episodes of hypoxia, more or less intense according to years, but with the same spatial distribution. This approach proved 2006 to be the most hypoxic year since 2000. The hypoxia was due to a rare conjunction of 3 factors :...
Tipo: Text
Palavras-chave: Baie Quiberon; Crassostrea gigas; Huître; Mortalité; Croissance; Hypoxie; Oxygène; Modèle; Upwelling; Loire; Vilaine; Quiberon; Crassostrea gigas; Oyster; Mortality; Growth; Hypoxia; Oxygen; Model; DEB; Upwelling; Loire; Vilaine.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00180/29131/27535.pdf

Endurcissement du naissain d’huîtres creuses, Crassostrea gigas par le niveau d’exondation ou la densité d’élevage : récapitulatif d’essais conduits entre 2004 et 2007 en rivière d’Auray (56), pour réduire les mortalités estivales
Provedor de dados: 5
Autores: Mazurie, Joseph; Bouget, Jean-francois; Langlade, Aime; Claude, Serge.
This report summarizes a list of husbandry experiments conducted between 2004 and 2007 so as to reduce the summer mortalities of the oyster Crassostrea gigas by farming practices. The Japanese technique so‐called “hardening”, based on nursing the young oysters (less than 1 year‐old) in intertidal areas with high air exposure, is tested and adapted. Significant improvements of survival rates (e.g. 60% survival instead of 40% survival rate) have been obtained by transferring the spat only a few month (between march and june‐july) on “high” inter‐tidal farming plots (up to 40% of mean air exposure time). In such conditions, growth is transiently reduced, but a compensatory growth seems to happen when oysters are transferred back on low concessions. Another...
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Mortalité; Endurcissement; Exondation; Densité; Oyster; Crassostrea gigas; Mortality; Hardening; Air exposure; Density.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00042/15350/12705.pdf

Space-time clustering of mortality notifications in Pacific oysters of Charente sluices, France, 2008-2010
Provedor de dados: 5
Autores: Lupo, Coralie; Mandard, Yann-vari; Arzul, Isabelle; Francois, Cyrille; Garcia, Celine; Renault, Tristan; Bareille, Nathalie.
Current monitoring of exceptional mortality events of oysters in France consists in passive surveillance, leading to delayed investigation of causation by scientists and management by policy makers. Early detection of clusters of mortality events in time and space would increase possibilities for their investigation and management. A space-time cluster analysis of existing mortality notifications in Pacific oysters was conducted in France, Charente sluices, from 2008 to 2010. As an example of potential demographic confounder of clustering, the analyses were adjusted on oyster age. Several clusters were identified in space and time each studied year. Patterns of mortality notifications were consistent with the introduction and spread of a contagious disease...
Tipo: Text
Palavras-chave: Notification; Oyster; Mortality; Cluster analysis; Saptiotemporal.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00058/16915/14393.pdf

A European epidemiological survey of Vibrio splendidus clade shows unexplored diversity and massive exchange of virulence factors
Provedor de dados: 5
Autores: Nasfi, H.; Travers, Marie-agnes; De Lorgeril, Julien; Habib, C.; Sannie, T.; Sorieul, L.; Gerard, J.; Avarre, J. C.; Haffner, Philippe; Tourbiez, Delphine; Renault, Tristan; Furones, D.; Roque, A.; Pruzzo, C.; Cheslett, D.; Gdoura, R.; Vallaeys, T.
The Vibrio splendidus clade has previously been associated with epidemic outbreaks of various aquatic animals, as in the case of the cupped oyster, Crassostrea gigas. To investigate whether involved strains could present a clonal origin and to identify possible alternative background carriage animals or zooplankton, a large epidemiological survey was conducted on isolates of the splendidus clade. For this purpose, Vibrio strains were isolated from various samples including oysters, mussels, sediments, zooplankton, and sea water on the basis of a North/South gradient of the European sea water zone (Ireland, The Netherlands, France, Italy, and Spain). A total of 435 isolates were successfully associated to the V. splendidus clade using real time polymerase...
Tipo: Text
Palavras-chave: VNTR; Vibrio splendidus; Epidemiology; Vsm; OmpU; Crassotrea giga; Mortality.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00255/36666/35350.pdf

The Manila clam population in Arcachon Bay (SW France): Can it be kept sustainable?
Provedor de dados: 5
Autores: Dang, Cecile; De Montaudouin, Xavier; Gam, Meriame; Paroissin, Christian; Bru, Noelle; Caill-milly, Nathalie.
The venerid clam Ruditapes philippinarum is the most prominent suspension-feeding bivalve inhabiting muddy intertidal seagrass beds in Arcachon Bay (SW France). It is exploited by fishermen, and Arcachon Bay ranks number one in France in terms of production and total biomass of this species. Previous studies revealed a decrease in the standing stock of R. philippinarum since 2003 and unbalanced length-frequency distributions with a lack of juveniles and of adults &gt;40 mm. Consequently, the population dynamics of this bivalve were studied at four intertidal sites and one oceanic site in Arcachon Bay. As clam size structure did not allow classical dynamics computations. field monitoring was coupled with field experiments (tagging-recapture) over two years....
Tipo: Text
Palavras-chave: Manila Clam; Ruditapes philippinarum; Growth; Mortality; Reproduction; Population Dynamic; Production; Productivity.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11292/7990.pdf

Vibrio aestuarianus subsp. cardii subsp. nov., pathogenic to the edible cockles Cerastoderma edule in France, and establishment of Vibrio aestuarianus subsp. aestuarianus subsp. nov. and Vibrio aestuarianus subsp. francensis subsp. nov.
Provedor de dados: 5
Autores: Garcia, Celine; Mesnil, Aurelie; Tourbiez, Delphine; Moussa Pouly, Mirna; Dubreuil, Christine; Gonçalves De Sa, Amélie; Chollet, Bruno; Godfrin, Yoann; Dégremont, Lionel; Serpin, Delphine; Travers, Marie-agnes.
Cockle mortality events have been reported in northern France since 2012. In the present study, we describe and investigate the implication of a potential bacterial causative agent in cockle mortality. Bacteria isolated from five different cockle mortality events were characterized and studied. Using phenotypic analysis combined with DNA–DNA hybridization (DDH) and whole genome sequencing, the isolates were shown to belong to Vibrio aestuarianus , a species regularly detected in France during oyster mortality events. Comparison of the strains from cockles with strains from French oysters and the type strain showed that the strains from cockles were genetically different to those from oysters and also different to the V. aestuarianus type strain. Moreover,...
Tipo: Text
Palavras-chave: Bacterial pathogen; Bivalvia; Cockle; Mortality; Shellfish; Vibrio aestuarianus.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00677/78893/81195.pdf

Evolution et estimation des mortalités estivales de naissain d'huître creuse (Crassostrea gigas) en baie de Quiberon, de mai à septembre 1998.
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Fleury, Pierre-gildas; Tige, Gilbert; Hirata, Toshio; Le Coguic, Marie-jo; Langlade, Aime; Mazurie, Joseph; Ostréiculteurs de la baie de Quiberon.
La question des mortalités estivales de naissains d'huîtres creuses en baie de Quiberon a été abordée selon deux approches complémentaires, l'une plus temporelle, avec le suivi estival régulier de quelques semis, l'autre plus spatiale avec une estimation en plongée des survies en fin d'été d'un plus grand nombre de semis répartis à travers la baie. Le suivi de l'évolution des semis a permis de dater et de quantifier les mortalités estivales sur plusieurs périodes (juin et août essentiellement) ; mais il n'a pas permis d'en identifier les causes. Le rôle des pathogènes, notamment, n'est pas défini. Par ailleurs, l'estimation spatiale des mortalités en fin d'été met en évidence des mortalités nettement différenciées entre les semis (entre 6 et 48%). Parmi...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Naissain; Quiberon; Mortalité; Croissance; Vitalité; Pathologie; Herpès-virus; Pacifie cupped oyster; Crassostrea gigas; Spat; Quiberon (France); Mortality; Growth; Vitality; Pathology; Herpes-virus.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00102/21326/18949.pdf

Age, growth and mortality of Sciaena umbra (Sciaenidae) in the Gulf of Tunis
Provedor de dados: 5
Autores: Chater, Ines; Romdhani-dhahri, Ahlem; Dufour, Jean-louis; Mahe, Kelig; Chakroun-marzouk, Nadia.
The growth and mortality of the brown meagre, Sciaena umbra from the Gulf of Tunis, were investigated using a sample of 276 specimens, ranging from 15.3 to 49.2 cm total length and from 43 to 1565 g total weight. Specimens were collected from artisanal fisheries between October 2008 and September 2011. Otoliths were extracted, thin cross-sections were realized and radii were measured. The log-linear morphometric relationships between total length-total weight and total length-otolith radius were significant (p &lt; 0.05), showed positive allometry (b=3.15) and isometry (b=0.90), respectively. The marginal analysis suggested that only one growth increment was deposited per year. The maximum age of the brown meagre was 22 years for males and 31 years for...
Tipo: Text
Palavras-chave: Brown meagre; Thin otoliths; Growth; Mortality; Gulf of Tunis; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00424/53552/54415.pdf

Mortalités massives de l’Huître creuse. Synthèse - Rapport final des études menées sur les mortalités de naissains d’huîtres creuses C. gigas sur le littoral charentais pour la période de 2007 à 2012
Provedor de dados: 5
Autores: Pepin, Jean-francois; Soletchnik, Patrick; Robert, Stéphane.
Since 2008, the French oyster-farming sector has been confronted with exceptionally high rates of mortality affecting spats (less than one year old) of the Pacific oyster, C. gigas, of between 60 and 90% at all rearing sites and in Pertuis Charentais sea. The objective of this document is to provide an overview of the research and studies carried out by Ifremer in Poitou-Charentes since the emergence of this phenomenon. The actions presented were funded by IFREMER, and CPER Poitou-Charentes 2007-2013.
Tipo: Text
Palavras-chave: Huître creuse; Naissain; Surmortalité; Virus herpès; Vibrions; Environnement; Pertuis charentais; Pacific oyster; Spat; Mortality; Herpes virus; Vibrios; Environment; Pertuis charentais.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00217/32856/31335.pdf

Pacem in terris pathogenibus bonae voluntatis: molluscs-pathogens relationships prospects
Provedor de dados: 5
Autores: Berthe, Franck.
In 1999, the world aquaculture production of molluscs was estimated at 9.4 million tonnes which represents approximately a 23% contribution to the global aquaculture production. Aquaculture of molluscs has been growing at an average annual rate of 11% over the past decades, although some activities - such as aquaculture of pectens or abalones - were growing even more rapidly. In many countries, there is a significant mollusc aquaculture, traditionally based on wild stocks. However, these natural populations frequently do not fulfil market demand, because of low value of the product, over-fishing of the resource and/or mass mortality outbreaks caused by diseases. A frequent answer to this situation has been the introduction of new stocks or new species in...
Tipo: Text
Palavras-chave: Mortality; Mollucs; Pathogen.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-2780.pdf

REMONOR : Résultats 2004. Evaluation de la mortalité, croissance et qualité des huîtres creuses
Provedor de dados: 5
Autores: Mary, Charlotte; Pien, S.
Since 1998, a growth and quality monitoring study of reared molluscs has been developed between the Shellfish Research Laboratory of Normandy (IFREMER Port-en-Bessin, Calvados) and the SMEL (Syndicat Mixte d'Expansion du Littoral) Experimental Centre (Blainville, Manche). REMONOR (REseau MOllusque de NORmandie). This study is based on the experience gained through the national monitoring network REMORA, which protocol has been entirely applied. Adults and spat of Pacific oysters Crassostrea gigas were dispatched on 17 stations all along the four oysters rearing areas of Normandy (Meuvaines-Asnelles, the Baie des Veys, the East and West coasts of the Cotentin peninsula -including Chausey archipelago-). These molluscs had the same origin and history (i.e....
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-2245.pdf

REMONOR. Résultats 2007. Evaluation de la mortalité, croissance et qualité des huîtres
Provedor de dados: 5
Autores: Ropert, Michel; Pien, S; Mary, Charlotte; Bouchaud, B.
Each year, the regional network REMONOR assesses the mortality, growth and quality of cupped oysters in two age classes ("adults", 2 years old; "juveniles", 1 year old) at various stations in the main oyster farming areas in Normandy. We used the protocol established by the national network REMORA. REMONOR is implemented by the Normandy Environment Resources Laboratory (LERN) in conjunction with the Joint Association for Coastal Fisheries (SMEL). This year, a new station at Fermanville (NC01), in the north of the Manche "département», was integrated into the network. This is the first deep-water station of the regional network....
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Cupped (gigas) oyster; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Huître creuse; Crassostrea gigas.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-4325.pdf

Diseases of cultured molluscs in Australia
Provedor de dados: 5
Autores: Lester, R.
Three mollusc species are cultured commercially in Australian tropical and warm temperate waters: the Sydney rock oyster Saccostrea commercialis , the pearl rock oyster is susceptible to two protozoans: Marteilia sydneyi , which is the cause of QX Disease and infects oysters during the summer; and Mikrocytos roughleyi which is associated with winter mortality. It also harbours mudworm, Polydora websteri a parasite farmers try to avoid by growing oysters on racks. Transported pearl oysters Pinctada maxima die with heavy infections of Vibrio harveyi . Cultured giant clams Tridacna gigas are pestered by pyramidellid snails and some carry Perkinsus sp., a protozoan common in reef bivalves. Deaths in mollusc hatcheries have been associated with Vibrio tubiashi...
Tipo: Text
Palavras-chave: Protozoa; Alteromonas; Vibrio tubiashi; Perkinsus; Vibrio harveyi; Polydora websteri; Mikrocytos roughleyi; Saccostrea commercialis; Pinctada maxima; Tridacna gigas; Bivalvia; Parasites; Mortality; Pearl culture; Infectious diseases; Parasitic diseases.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1468.pdf

Performances d'élevage de la moule (Mytilus edulis) en Manche/Atlantique. Recensement et interprétation. 1 : Synthèse et rapport
Provedor de dados: 5
Autores: Rodriguez, Julien.
The objective of this study is to explain the decrease in mussel production, along the French coasts of Atlantic and the English Channel, through existing data and additional inquiries. This decrease in 2010 and 2011 had two components : a growth deficit and losses of mussels, due to detachment and mortality. Both inter-annual and geographic differences in rearing yields seem to be linked to phytoplankton abundance and turbidity. In 2011, severe droughts have impacted the level of rivers effluents to marine, limiting nutrients inputs. In 2010, frequent winds from east seem to have maintained the phytoplankton blooms away from the coasts. Detachment and mortalities of mussels might be due to physiological stress or weakening linked to poor environmental...
Tipo: Text
Palavras-chave: Mytiliculture; Bouchots; Moule; Mytilus edulis; Performances d’élevage; Bassins conchylicoles; Croissance; Décrochage; Mortalité; Byssus; Prédation; Réseaux; Sécheresse; Régimes de vents; Mussel farming; Bouchot; Mytilus edulis; Growth; Mortality; Byssus; Detachment; Meteorological conditions.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00142/25341/23422.pdf

Réseau de suivi de la croissance de l'huître creuse en Bretagne. Synthèse des quatre années 1989 à 1992
Provedor de dados: 5
Autores: Littaye-mariette, Anne; Mazurie, Joseph.
Since 1989, an homogeneous Crassostrea gigas oyster stock has been distributed once a year on several rearing sites in Brittany (3 populations per site). The main quantitative and qualitative growth descriptors, which reflect water quality effects during the monitoring period, are estimated at the end of each year. The 1989-1992 analysis prompted us to describe various growth responses correlated to biotops: oyster production in open areas influenced by oceanic waters was fairly constant in quality, including size and Polydora sp. infestation. In contrast, oysters in estuarine areas, partly affected by eutrophication (e.g., Aber Benoît, Pen Bé), or with a low carrying capacity, were characterized by weight and Polydora sp. infestation heterogeneity. These...
Tipo: Text
Palavras-chave: Polydora; Condition Index; Mortality; Growth; Monitoring; Oyster; Crassostrea gigas; Brittany; Polydora; Indice de condition; Mortalité; Croissance; Réseau; Huître; Crassostrea gigas; Bretagne.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-1639.pdf

RESCO - Réseau d'observations Conchylicoles : Campagne 2013
Provedor de dados: 5
Autores: Fleury, Elodie.
The French network RESCO was developed in 2009, following the widespread mortalities in French oysters stocks of Crassostrea gigas that killed a majority of young cultivated oysters in summer 2008. The main objective of this network was to develop a tool of estimation of the mortalities at national scale, through a standardized monitoring of sentinel oysters In 2013, similar batches of spat and 18 month old oysters from different origins were deployed in thirteen sites located all along the French coasts to measure the spatial and temporal evolution of the mortality and growth rates. At the same time, the program provides a high-frequency recording of environmental parameters and the detection of the main infectious agents associated to the oyster...
Tipo: Text
Palavras-chave: Crassostrea gigas; Huître creuse; Mortalité; Croissance; Température; Enregistrement haute fréquence; Herpes virus; Vibrio aesturianus; Agent pathogène; Crassostrea gigas; Pacific oyster; Mortality; Growth; Temperature; High frequency data acquisition; Herpes virus; Vibrio aestuarianus; Infectious agent.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00197/30851/29212.pdf

Mortalités massives de l'huître creuse - Rapport final du programme de recherche sur l'étude de la cinétique de détection d'agents infectieux associés à des épisodes de mortalités de naissains d'huîtres creuses Crassostrea gigas sur un site ostréicole de Marennes-Oléron (CIDAGINF 2009-2010)
Provedor de dados: 5
Autores: Saulnier, Denis; Pepin, Jean-francois; Guesdon, Stephane; Degremont, Lionel; Faury, Nicole; Haffner, Philippe; Renault, Tristan; Travers, Marie-agnes; Tourbiez, Delphine; Geairon, Philippe; Le Moine, Olivier; Seugnet, Jean-luc; Soletchnik, Patrick.
This study aims to improve understanding of causes of mortalities in oyster Crassostrea gigas in pertuis charentais related to environmental parameters and the kinetics of targeted infectious agents, such as bacteria Vibrio splendidus (group ) and V. aestuarianus and Ostreid herpesvirus OsHV-1. Two sampling campaigns were carried out on the site of Agnas in 2009 and 2010, before, during or following mortality events of spat from March to September. The approach is to detect and quantify in short time step infectious agents from tissues of farmed oysters placed on rack and in various samples taken nearby: native oysters and other species (wild mussels and barnacles), seawater and sediment. With physical and chemical automatic probes placed on the site,...
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Mortalité; Virus herpès; Vibrions; Environnement; Pertuis Charentais; Pacific oyster; Crassostrea gigas; Mortality; Herpes virus; Vibrios; Environment; Pertuis Charentais.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00058/16920/14400.pdf

REMORA. Résultats nationaux année 1994
Provedor de dados: 5
Autores: Goyard, Emmanuel.
What is REMORA? REMORA &amp;#8722;REseau MOllusques du département Ressources Aquacoles&amp;#8722; (Aquaculture Resources Department Mollusc Network) is a surveillance network dedicated to the growth of hollow oysters Crassostrea gigas. In the past and in most production areas, observations were made on a regular basis. In 1993, homogenising experimental protocols between the different laboratories involved was decided, as well as using a common initial oyster batch, therefore organizing a network covering all of the French coasts. This network aims at providing, each year, the production's basic characteristics found in main oyster beds (growth reference). It also better characterizes variations and shows potential tendencies.
Tipo: Text
Palavras-chave: Mortality; France; Network of monitoring; Crassostrea gigas; Growth; Oyster culture.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/rapport-1755.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; résultats des stations NATIONALES ; Année 2004
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Simonne, Charlotte; Claude, Serge; Palvadeau, Hubert; Guilpain, Patrice; D'Amico, Florence; Le Gall, Patrik; Vercelli, Catherine; Pien, C.
The network REMORA by IFREMER quarterly follows each year 2 batches of Pacific cupped oysters Crassostrea gigas ("juveniles"= 1 year old; and "adults" = 2 years old) on various sites among the main French oyster areas. The network monitored 46 sites in 2004, including the 7 new sites added in 2003. The network REMORA thus assess seasonal survival, growth and quality of cupped oysters. It is a tool for trend estimations, ecosystem management and a reference frame for scientific studies. Globally speaking, the year 2004 was a good year for oyster farming, with a low mortality and a fast growth. The rearing yield (survival x growth) reached 2.0 for adults instead of 1.8 usually. However, the meat index remained close to the average inter annual data....
Tipo: Text
Palavras-chave: Polydora; Quality; Growth; Mortality; Crassostrea gigas; Pacific Cupped oyster; France; REMORA; Polydora; Qualité; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-2413.pdf

Le réseau REMORA de suivi de la croissance des huîtres creuses Crassostrea gigas ; analyse des premières tendances (1993-98) en Bretagne.
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Goyard, Emmanuel; Mazurie, Joseph; Claude, Serge; Bouget, Jean-francois; Langlade, Aime; Le Coguic, Marie-jo.
The network IFREMER/REMORA has watched every year, since 1993, from February to December, mortality, growth and quality criteria of two oyster class-size ("juveniles" of the first-year c1ass and "adults" of the second year c1ass), distributed among various stations of the French oyster areas. This has provided a quite standard and simple annual assessment of the rearing results, generally tallied with professional observations. From year to year, data series have been obtained, from which mean values (references), chronological trends or spatial differences can be analysed. Results in Brittany, from 1993 to 1998, show that, in a "normal" year, 30 g oysters grow to 60-80 g at the end of the year, with a mortality rate of 10-15%. Mortality occures mainly in...
Tipo: Text
Palavras-chave: REMORA; Bretagne; Huître creuse; Crassostrea gigas; Mortalité; Croissance; Qualité; Polydora; REMORA; Brittany (France); Gigas oyster; Crassostrea gigas; Mortality; Growth; Quality; Polydora.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00113/22386/20081.pdf

Contributions du Laboratoire Conchylicole de Poitou-Charente au défi MOREST en 2002. Thématique "Ecologie côtière"
Provedor de dados: 5
Autores: Soletchnik, Patrick; Le Moine, Olivier; Faury, Nicole; Guilpain, Patrice; Geairon, Philippe; Razet, Daniel; Madec, Patrick; Robert, Stephane; Taillade, Sylvie; Doner, Anne.
This report presents results obtained by the LCPC in coastal Ecology. The contributions of the LCPC, as partner associated with the genetic studies, do not appear in this report. This report is divided in 5 parts of differing importance :  • Task 2.2.3. A "multi-disciplinary study of the DYNAmics of estival mortalities of Crassostrea gigas in the Marenne - Oléron Basin (Dynamo-2002)"; study developed and directed by the LCPC after the “plat-table” C. gigas mortality model in the Marennes- Oleron Basin.  • Task 2.3 . "Influence of autumn and winter conditions on the maturation of parents (phase 1) and on the survival of their offspring (phase 2) (Gegen). Action directed by the LCPC.  • Task 2.2.1. " Dynamics of mortality, reproduction and spawning....
Tipo: Text
Palavras-chave: MOREST; Crassostrea gigas; Mortalité; Ecologie côtière; MOREST; Crassostrea gigas; Mortality; Coastal Ecology.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00164/27549/25714.pdf

Grow-out mariculture techniques in tropical waters: A case study of problems and solutions in Hong Kong.
Provedor de dados: 5
Autores: Wu, R; Lee, J.
Raft culture is practised and trash fish is being used as feed in Hong Kong. Culture space is limited and most of the culture sites are over-crowded. Food conversion ratio is poor (about 10-15), grow-out mortality is high (30-50%) and fish kills caused by oxygen depletions, algal blooms and red tides occur frequently. Disease and water pollution are also problems.
Tipo: Text
Palavras-chave: Sparidae; Pisces; Indicator species; Diseases; Water pollution; Cage culture; Artificial feeding; Food fish; Oxygen depletion; Mortality; Growth; Stocking density; Fish culture.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1427.pdf

Mortalité du tourteau Cancer pagurus provoquée par le dinoflagelle parasite : Hematodinium sp.
Provedor de dados: 5
Autores: Latrouite, Daniel; Morizur, Yvon; Noel, Philippe; Chagot, Dominique; Wilhelm, G.
Unusural crab mortality in winter led us to identify a Hematodinium like parasitic dinoflagellate in the blood of edible crabs Cancer pagurus. Crabs from several fishing areas (the English Channel, the Iroise sea, the bay of Biscay, off Scotland) and from one area of the Channel shore were examined. The crab parasit was found everywhere we investigated and throughout the year. The prevalence which was found independant of the intermolt stage, sex and size of crabs was higher inshore than offshore. The pathogenicity is assumed to differ according to season.
Tipo: Text
Palavras-chave: Edible crab; Pathology; Bay of Biscay; Iroise sea; Channel; Parasite; Mortality; Hematodinium; Bitter crab desease; Dinoflagelle; Aquiculture; Cancer pagurus; Mortalité; Hematodinium; Cancer pagurus; Tourteau; Pathologie.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/acte-1418.pdf

Réseau d'évaluation de la croissance de l'huître creuse sur les côtes françaises (REMORA) ; résultats des stations de BRETAGNE (Année 1999)
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Claude, Serge; Bouget, Jean-francois; Langlade, Aime; Le Coguic, Yvette.
The network IFREMER/ REMORA watches every year, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), distributed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale). With regard to the Breton stations of the network, the year 1999 showed a small increase of mortality rates, both in adults alter their transfer on the REMORA stations and in juveniles during the Summer season. this was particularly observed in Morlaix, Aber Benoît and Pen-Bé. Although it was better than 1998, the year 1999 was a poor year for growth, especially in North Brittany (62.5 g in...
Tipo: Text
Palavras-chave: REMORA; Bretagne; Huître creuse; Mortalité; Croissance; Qualité commerciale; Polydora; REMORA; Brittany; Gigas oyster; Mortality; Growth; Commercial quality; Polydora.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00113/22388/20083.pdf

Croissance et mortalite du petoncle noir Chlamys varia dans le bassin d'Arcachon, France
Provedor de dados: 5
Autores: Trut, Gilles; Robert, Rene; Laborde, Jean-louis.
Until 1960, the Black scallop Chlamys varia was relatively abundant along the French Atlantic coasts. Today most of these natural beds have disappeared. Because mollusc hatchery and nursery techniques have been mastered, the reintroduction of this species, under control, was carried out in several areas and particularly in the bay of Arcachon, from 1989 to 1992. Good results were obtained in hatchery and nursery but the development of the juveniles in the natural fields was poor. The growth of Chlamys varia was satisfactory but heavy mortalities were rapidly recorded which could not be related to the hydrobiological conditions. This species seems to be very sensitive to short emersion and removal operations which are incompatible with aquaculture processes.
Tipo: Text
Palavras-chave: Bassin d'Arcachon; Mortalité; Croissance; Chlamys varia; Mollusque; Bay of Arcachon; Mortality; Growth; Chlamys varia; Mollusc.
Ano: 1994
URL: https://archimer.ifremer.fr/doc/1994/rapport-1567.pdf

Effect of trematode parasites on cockle Cerastoderma edule growth and condition index: a transplant experiment
Provedor de dados: 5
Autores: De Montaudouin, X.; Bazairi, H.; Culloty, S.
We quantified the effect of trematode parasites in cockles through a 303 d transplant experiment. Cockles were sampled in 3 different sites on the southwest coast of France characterized by 3 different trematode communities, i.e. Royan (RO): high Meiogymnophallus minutus abundance near cockle heart, South Arguin (SA): high Himasthla interrupta abundance in the mantle margin, and North Arguin (NA): almost free of trematodes. Sampled cockles were individually tagged and placed in different cages at Banc d'Arguin, Arcachon Bay. At the end of the experiment, RO cockles had lost their trematodes, highlighting the fact that trematode lifespan can be short, while SA cockles maintained their trematode load. When cockles were the second intermediate host, there was...
Tipo: Text
Palavras-chave: Cerastoderma edule; Parasitism; Growth; Mortality; Condition index; Transplant experiment.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00375/48640/49090.pdf

Genetic polymorphism of glutamine synthetase and delta-9 desaturase in families of Pacific oyster Crassostrea gigas and susceptibility to summer mortality
Provedor de dados: 5
Autores: David, Elise; Boudry, Pierre; Degremont, Lionel; Tanguy, Amelie; Quere, N; Samain, Jean-francois; Moraga, D.
Large-scale mortality events have been observed in Pacific oyster Crassostrea gigas on the west coast of France since the early 1980s, particularly during summer. In order to understand the causes of this mortality, two generations of oysters from single-pair matings were studied in three sites on the French Atlantic coast (Baie-des-Veys, Auray and Ronce-les-Bains). The present paper examines the role of two candidate genes in the susceptibility of oysters to summer mortality, and the selective pressure exerted by such mortality on their polymorphism. Glutamine synthetase (amino-acid metabolism) and delta-9 desaturase (lipid metabolism) genes were studied in the successive generations, using polymerase chain reaction single-strand conformation polymorphism...
Tipo: Text
Palavras-chave: SSCP; Mortality; Glutamine synthetase; Delta 9 desaturase; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3040.pdf

Changes in planktonic microbial components in interaction with juvenile oysters during a mortality episode in the Thau lagoon (France)
Provedor de dados: 5
Autores: Richard, Marion; Bec, Beatrice; Vanhuysse, Charles; Mas, Sébastien; Parin, David; Chantalat, Camila; Le Gall, Patrik; Fiandrino, Annie; Lagarde, Franck; Mortreux, Serge; Ouisse, Vincent; Rolland, Jean-luc; Degut, Anaïs; Hatey, Elise; Fortune, Martine; Roque D'Orbcastel, Emmanuelle; Messiaen, Gregory; Munaron, Dominique; Callier, Myriam; Oheix, Jocelyne; Derolez, Valerie; Mostajir, Behzad.
Oysters modify the planktonic microbial community structure by their filtration and NH4 excretion activities. While many studies have been conducted on this subject with adult oysters, none had been carried out in situ with juveniles. Pacific oyster juveniles (Magallana gigas, previously Crassostrea gigas) died massively all over the world since 2008 in relation with OsHV-1 infection. During mortality episodes, sick and dead oysters are not separated from healthy live ones, and left to decay in the surrounding environment, with unknown consequences for the nutrient cycle and planktonic microbial components (PMC). The present study aimed to elucidate for the first time the interactions between oyster juveniles and PMC during a mortality episode. Innovative...
Tipo: Text
Palavras-chave: Magallana gigas; Crassostrea gigas; Spat; OsHV-1 mu Var; Mortality; Picoplankton; Heterotrophic flagellates; Ciliates; Uronema; Balanion.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00474/58559/61115.pdf

A herpes-like virus infects a non-ostreid bivalve species: virus replication in Ruditapes philippinarum larvae
Provedor de dados: 5
Autores: Renault, Tristan; Lipart, Cecile; Arzul, Isabelle.
Sporadic high mortalities were reported in June 1997 among hatchery-reared larval Manila clam Ruditapes philippinarum in a French commercial hatchery. Cellular abnormalities were observed in semi-thin sections in affected animals. Transmission electron microscopy revealed the presence of herpes-like virus particles in larvae. This is the first description of a herpes-like virus infection in larval R. philippinarum, a non-ostreid bivalve species. Virus particles were similar to other herpes-like viruses described from different oyster species with respect to ultrastructure and morphogenesis. Electron microscopic examination also demonstrated cells with condensed chromatin and extensive perinuclear fragmentation of chromatin. Like viruses infecting oysters,...
Tipo: Text
Palavras-chave: Apoptosis; Virus replication; Mortality; Ruditapes philippinarum; Manila clam; Herpes like virus.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-816.pdf

Mass mortality in bivalves and the intricate case of the Pacific oyster, Crassostrea gigas
Provedor de dados: 5
Autores: Barbosa-solomieu, Valerie; Renault, Tristan; Travers, Marie-agnes.
Massive mortality outbreaks in cultured bivalves have been reported worldwide and they have been associated with infection by a range of viral and bacterial pathogens. Due to their economic and social impact, these episodes constitute a particularly sensitive issue in Pacific oyster (Crassostrea gigas) production. Since 2008, mortality outbreaks affecting C. gigas have increased in terms of intensity and geographic distribution. Epidemiologic surveys have lead to the incrimination of pathogens, specifically OsHV-1 and bacteria of the Vibrio genus, in particular Vibrio aestuarianus. Pathogen diversity may partially account for the variability in the outcome of infections. Host factors (age, reproductive status…) including their genetic background that has...
Tipo: Text
Palavras-chave: Pacific oyster; Spat; OsHV-1; Vibrio aestuarianus; Mortality.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00274/38534/37051.pdf

Etude des interactions hôte/virus chez l’huître creuse Crassostrea gigas et son virus Ostreid herpesvirus 1
Provedor de dados: 5
Autores: Segarra, Amelie.
Ostreid herpesvirus type 1 (OsHV-1) can be considered one of the major infectious agents in Pacific oysters, Crassostrea gigas, in France and all around the world. Differences in terms of mortality among infected animals were reported suggesting a genetic basis of the susceptibility to the OsHV-1 infection. In this context, the main objective of this thesis was to understand the interactions between Pacific oysters and OsHV-1, in particular, the molecular basis of the viral cycle. Results showed that the virus is able to replicate in the host regardless of its stage of development or its susceptibility. However, multiplication kinetics is faster in the most susceptible individuals compared to less susceptible ones. After an active replication phase, it...
Tipo: Text
Palavras-chave: Bivalves; Huître creuse; Crassostrea gigas; Mortalités; OsHV-1; Gènes viruax; Interaction hôte-virus; Transcriptome; Sensibilité; PCR en temps réel; Bivalve; Pacific oyster; Crassostrea ggias; Mortality; OsHV-1; Viral gene; Interaction host-virus; Transcriptome; Susceptibility; Real-time PCR.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00252/36297/34826.pdf

Size and genotype affect resistance to mortality caused by OsHV-1 in Crassostrea gigas
Provedor de dados: 5
Autores: Degremont, Lionel.
As with summer mortalities reported in France between 2001 and 2006, mortality caused by the Ostreid herpesvirus 1 (OsHV-1) in Crassostrea gigas affects mostly juveniles, although adults can also be impacted to a small extent. This could suggest that both mortalities have similar causes and that establishment of resistance, in particular to the Ostreid herpesvirus 1 (OsHV-1), depends on either the size or the age of oysters. The present study reports an investigation of both size and age using three cohorts produced during winter and three produced during summer. Each cohort contained oysters genetically selected to be resistant or susceptible to the summer mortality phenomenon, as well as unselected control oysters. Any abnormal mortality was recorded...
Tipo: Text
Palavras-chave: Mortality; Crassostrea gigas; Disease resistance; Size; Age; Ostreid herpesvirus.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00157/26799/24909.pdf

Nutrition and reproduction are key parameters in the interaction process leading to Crassostrea gigas oyster summer mortality in France
Provedor de dados: 5
Autores: Samain, Jean-francois; Degremont, Lionel; Soletchnik, Patrick; Ropert, Michel; Bedier, Edouard; Mazurie, Joseph; Mazurie, Joseph; Martin, Jean-louis; Moal, Jeanne; Mathieu, Michel; Pouvreau, Stephane; Lambert, Christophe; Escoubas, Jean-michel; Nicolas, Jean-louis; Le Roux, Frédérique; Renault, Tristan; Burgeot, Thierry; Bacher, Cedric; Boudry, Pierre.
Complex interactions between oyster, environment and pathogens were observed during the MOREST (2001-2005) project on summer mortality events of Crassostrea gigas oysters in France. The talk will show how nutrition level increasing reproductive intensity generates a risk for pathogen infection under synergistic effect of temperature and stress. Moreover, a genetic component is associated to specific reproductive performances and spawning behaviour. To better understand origin of such resistance or susceptibility to summer mortality, other characteristics as stress susceptibility, energy management and hemocyte activities of oysters from the two phenotypes were compared. This first comparison suggests interactions between stress, reproduction and defence...
Tipo: Text
Palavras-chave: Genetic; Pathologie; Mortality; Crassostrea gigas; Pacific oyster; Reproduction; Nutrition; Physilogy.
Ano: 2006
URL: https://archimer.ifremer.fr/doc/2006/acte-3467.pdf

Incidences des épisodes d'efflorescences de micro algues toxiques sur les écosystèmes et sur les pêcheries de coquillages en baie de Douarnenez
Provedor de dados: 5
Autores: Thebaud, Olivier; Veron, Gerard; Fifas, Spyros.
The commercial fishery for wedge clam, or telline (Donax trunculus) in the bay of Douarnenez in France started in the early 1980ies. During twenty years, the activity has developed, from an opportunistic fishery, into a regular fishing enterprise for 36 fishermen, who derive from it most, if not all, of their revenue. The fishery is nowadays strictly regulated. It is subject to natural variations in the productivity of clam stocks, in relation with meteorological conditions which can strongly affect the stocks.  The bay of Douarnenez has been experiencing regular blooms of harmful algae, both of species leading to shellfish poisoning for human consumption, such as Dinophysis (Diarrhoeic Shellfish Poisoning) and Pseudo-nitzschia (Amnesic Shellfish...
Tipo: Text
Palavras-chave: Temporary fishing ban; Mortality; Economic impact; Fishery; Wedge clam; Donax trunculus; Fermeture temporaire; Mortalité; Impact; Pêcherie; Telline; Donax trunculus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-1262.pdf

Les risques conchylicoles en Baie de Quiberon. Première partie : le risque de mortalité virale du naissain d’huître creuse Crassostra gigas. Rapport final du projet Risco 2010-2013
Provedor de dados: 5
Autores: Mazurie, Joseph; Stanisiere, Jean-yves; Langlade, Aime; Bouget, Jean-francois; Dumas, Franck; Treguier, Cathy; Leclerc, Emilie; Ravaud, Emilie; Quinsat, Kevin; Gabellec, Raoul; Retho, Michael; Cochet, Helene; Dreano, Alain.
This study (“Risco”), implicating both industry, socio-economic experts and biologists, was funded by the Regional Council of Brittany, for 3 years (2010-2013), to investigate upon the origin of oysters (Crassostrea gigas) mortalities in the bay of Quiberon (South Brittany, France). Specific mortalities of adult oysters were recorded in this bay in 2006, whereas mortalities of one year old spat were observed since in 2008 in this bay as at a national scale. The experimental protocol in 2010, including a monthly survey of oyster batches at 15 experimental stations, allowed to assess the risk for one-year oysters, due to viral disease. A clear spatial distribution of this risk was evidenced, with a western area spared from contamination and mortality, and a...
Tipo: Text
Palavras-chave: Baie de Quiberon; Crassostrea gigas; Mortalité; Herpès-virus; OsHV-1; Épidémiologie; Modèle.; Quiberon bay; Crassostrea gigas; Mortality; Herpes-virus; OsHV-1; Epidemiology; Model.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00179/29043/27528.pdf

Histological abnormalities related to mortality in penaeid shrimp (Penaeus stylirostris) reared in New-Caledonia
Provedor de dados: 5
Autores: Berthe, Franck; Legroumellec, Marc; Haffner, Philippe; Renault, Tristan.
Outbreaks of mass mortality occurred since 1993 in penaeid shrimp (Penaeus stylirostris) reared in New-Caledonia. Since then, the disease, called "syndrome 93" (S93) has inflicted serious losses (60 to 100%) during the cold period and thus must be considered as an economically significant disease.
Tipo: Text
Palavras-chave: Penaeus stylirostris; Penaeid shrimp; Mortality; Histology.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/1995/acte-2974.pdf

Optimisation d'une méthode standardisée de choc thermique sur des juvéniles de Crassostrea gigas : application à des populations d'ecloseries
Provedor de dados: 5
Autores: Catois, Stéphane; Haure, Joel; Martin, J-l.; Nourry, Max; Palvadeau, Hubert; Baud, Jean-pierre.
Mortality among juvenile Crassostrea gigas has been occuring during the summer months since 1995 and is now considered to be a real problem for French oyster culture. The aim of this study was to standardise the stress that could be applied to Crassostrea gigas spat. In initial experiments in 1998, the weight of individual spat and the duration of a heat shock at 50°C in freshwater, adapted for oysters of between 500 and 2000 mg, were built into a model to obtain 50% mortality. However, the precision was low (50%) and will need to be improved in the future. Following this, hatchery-produced juveniles weighing 10 to 500 mg were subjected to heat shock at 45°C in heshwater ; the duration of the shock was calculated based on a model built in 1997. The results...
Tipo: Text
Palavras-chave: Crassostrea gigas; Stress; Choc thermique; Mortalité; Crassostrea gigas; Stress; Heat shock; Mortality.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00080/19095/16690.pdf

ReMoNor : Résultats 2000
Provedor de dados: 5
Autores: Cornette, Florence; Blin, J.l.; Pacary, S; Pien, S; Le Gagneur, Eric; Kopp, Joel; Richard, O.
At the end of its third year, the regional network for monitoring REMONOR, confirms the particularities of oyster from Normandy in matter of growth and quality. Results from 2 000 are globally very close of those from 1998. Mortality of adults reached 14% and juvenile 6% which represent a low death rate. For this year the most blow area is the Baie des Veys with 31% death rate at Géfosse. Observed growth this year had been weaker than the past two years despite the spring and automnal growth. At spring, the higher recorded growth rate on the West coast with 0.42% (regional average : 0.29%). This seasonal trend seems more and more obvious every year. Regarding the classification of the special oysters, despite the change of the standard, the Baie des Veys...
Tipo: Text
Palavras-chave: REMORA; Quality; Growth; Mortality; Normandy; REMONOR; Crassostrea gigas; REMORA; Qualité; Croissance; Mortalité; Basse Normandie; REMONOR; Crassostrea gigas.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/rapport-2251.pdf

Biological and economic factors in the selection of cultured fish species and the development of a bio-economic model
Provedor de dados: 5
Autores: Wu, R.
The selection of candidate species for mariculture is determined by a number of biological factors, e.g. foraging efficiency, growth efficiency, mortality, grow-out period and susceptibility to environmental fluctuations, disease and crowding, as well as economic factors e.g. the supply and price of fry, grow-out cost and price of adult. A computer model incorporating these major factors is being developed, to determine and compare the potential of different culture species.
Tipo: Text
Palavras-chave: Lates calcarifer; Epinephelus tauvina; Mylio macrocephalus; Pisces; Marine fish; Tolerance; Biology; Modelling; Economic models; Diseases; Mortality; Growth; Cultured organisms.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1488.pdf

L'huître creuse Crassostrea gigas en Bretagne. Résultats du réseau de suivi de 1990
Provedor de dados: 5
Autores: Le Bec, Claude; Mazurie, Joseph.
The year 1990 is the second of a regional monitoring program on production assessment of Crassostrea in Britlany. 9 sites have been tested with 3 stations per site and 3 oysters bags in each station, at 3 different densities : 170, 210 and 250 oysters per bag. 18 month old oysters stocked in bags in march were analyzed 43 weeks later, by variables concerning growth, survival, quality... The growth was lower at higher densities, more or less according to sites. As previously, differences between sites and stations are observed, with some confirmations (higher mortalities in Aber Benoît site) and also evolutions (growth and Polydora infestations improvement in Pen Bé site).
Tipo: Text
Palavras-chave: Bretagne; Crassostrea gigas; Mortalité; Indice de condition; Polydora; ACP; Brittany; Crassostrea gigas; Mortality; Condition index; Polydora; Factorial analysis.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00102/21318/18938.pdf

Réseau de suivi de la croissance de l'huître creuse sur les côtes françaises (REMORA) , résultats des stations de BRETAGNE (Année 1998)
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Claude, Serge; Langlade, Aime; Le Coguic, Yvette.
The network IFREMER/ REMORA watches every year, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), distributed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be regarded as an accurate estimation of professional oyster ongrowings. With regard to REMORA results, generally tallied with professional observations, 1998 on the whole was a second year of low mortality. But some areas remained affected by significant mortalities such as Pen-Bé in South Brittany. The year 1998 was overall a very poor year for growth : the mean oyster weight in...
Tipo: Text
Palavras-chave: REMORA; Bretagne; Huître creuse; Mortalité; Croissance; Qualité commerciale; Polydora; REMORA; Brittany; Gigas oyster; Mortality; Growth; Commercial quality; Polydora.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00113/22387/20082.pdf

Mortalités printanière et estivale de l'huître creuse C. gigas en élevage à plat dans le bassin de Marennes-Oléron. Etude du métabolisme du glycogène sur différentes origines de cheptels
Provedor de dados: 5
Autores: Faury, Nicole; Remoue, Sophie; Soletchnik, Patrick; Goulletquer, Philippe; Geairon, Philippe; Le Moine, Olivier; Razet, Daniel; Guilpain, Patrice; Robert, Stephane; Taillade, Sylvie.
This study aims to assess the broodstock origin and cultural effects on oyster summer mortality rates. Three oyster batches, two originating from the Marennes-Oléron Bay, and one from the Normandy rearing area were deployed in March 2000 on the Ronce Perquis oyster bank, on experimental site since 1996. On bottom cultured oysters were monitored until January 2001. By the end of the experiment, the cumulative mortality ranged from 51 to 58 %. Following on initial mortality rate (8.8 % to 9.3 %), oyster batches showed a critical period early July. In 15 days, mortality rate reached 13.7 %. Over the rearing period, the oyster shell growth ranged between 8.9 g and 12.7 g. The somatic gain represented 0.44-0.48 g of dry meat weight. Spawning event occured in...
Tipo: Text
Palavras-chave: Taux de mortalité; Croissance; Composition biochimique; Effort de reproduction; Incorporation du glucose; Crassostrea gigas; Bassin de Marennes Oléron; Charente-Maritime; Mortality; Growth rate; Biochemical content; Glycogen synthase; Crassostrea gigas; Bay of Marennes Oleron; Charente-Maritime.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00031/14235/11511.pdf

First results of an epidemiological study on oyster (Crassostrea gigas) mortality events in France during summer 2008
Provedor de dados: 5
Autores: Miossec, Laurence; Allain, Gwenhael; Arzul, Isabelle; Francois, Cyrille; Garcia, Celine; Cameron, Angus.
Abnormal mortalities occurred in most oyster producing areas in France during the summer of 2008.  The mortalities were sudden and severe (up to 100%) and mainly affected 6 to 18 month old juveniles.  Only Crassostrea gigas species was affected.  The cause of the mortality was unclear but OsHV-1 virus and bacteria belonging to Vibrionaceae family were frequently detected in affected populations. An epidemiological study was commenced in autumn 2008 in order to identify factors associated with, and the cause (or causes) of these mortalities.  This paper presents the results of the first (descriptive) part of this investigation.  The objectives were to identify the affected population and to describe the pattern of mortalities in time and space.  Mortality...
Tipo: Text
Palavras-chave: France; Crassostrea gigas; Oyster; Mortality; Epidemological study.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/acte-6772.pdf

Effets de la turbidité sur les palourdes adultes Ruditapes philippinarum (Adams &amp; Reeve) : croissance, mortalité, effort de reproduction, composition biochimique
Provedor de dados: 5
Autores: Daou, Rafik; Goulletquer, Philippe.
Following observations on disparity in the growth of the Manila clam bred in the field, laboratory experiments were conducted to test the turbidity. This factor influenced the growth and mortality of Manila clam. The reproductive effort, growth and mortality of two populations were followed, one being cultivated in water with high levels on silt. A biochemical survey permitted the response to the effect of mineral particles to be estimated
Tipo: Text
Palavras-chave: Mortality; Reproductive effort; Biochemical changes; Ruditapes philippinarum; Turbidity; Mortalité; Effort de reproduction; Composition biochimique; Ruditapes philippinarum; Turbidité.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-2876.pdf

Etude de la Sensibilite Thermique des Larves du Crustace Decapode : Palaemon Serratus (Pennant).
Provedor de dados: 5
The whole of experiments carried on from thermal constraints on the larval development of Palaemon serratus allows the following observations: -individual rearings obtain the best survival rates in the witness groups and neutralize by a dense food and the absence of intraspecific cannibalism, factors which can interfere with the results ascribed only to the experiments; - slight thermal increases (10 and 12 degree C) do not involve secondary effects on the post larvae when the development is realized at 20 degree C; - if the TL 50 is reaching 34 degree C, letal effects are observed, as soon as the final temperature; - whatever is the temperature increase, the relation = mortality/temperature reached is similar and this factor mortalities observed, that...
Tipo: Text
Palavras-chave: Palaemon serratus; Mortality; Lethal limits; Larval development; Temperature tolerance; Rearing.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1931.pdf

Mise au point d'un outil de caractérisation de l'état physiologique des cheptels d'huîtres. Etude expérimentale sur des familles génétiques de l'huître creuse Crassostrea gigas
Provedor de dados: 5
Autores: De Ambroggi, Céline.
This study is in keeping with the comprehension of summer mortalities that affects Crassostrea gigas Pacific cupped oysters' spa!. The aim is to characterize genetic families in a physiologic way, and to compare these families qualities with the noticed mortalities. The employed approach consists, on the one hand, in characterising Iivestocks qualities with instantaneous measurings of respiration and biometry. They respectively allow to estimate basic metabolism and to calculate state index. On the other hand, it consists in measuring differently degrees of resistance by the observation of respiration and mortality after thermal stresses. This study allowed to show that the environment and the stresses only act as indications of a pre-existent wealilless,...
Tipo: Text
Palavras-chave: Mortalité; Crassostrea gigas; Familles gééntiques; Métabolisme; Respiration; Mortality; Crassostrea gigas; Genetic family; Metabolism; Respiration.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00412/52321/53090.pdf

Effects of nutritional requirement of live food organisms on growth and survival of barramundi/seabass Lates calcarifer (Bloch) larvae.
Provedor de dados: 5
Autores: Rimmer, M; Reed, A.
Larvae of barramundi (Lates calcarifer ) reared intensively in some Australian hatcheries have suffered periodic high mortalities which have been ascribed to nutritional deficiencies in the live food organisms used, particularly deficiencies of polyunsaturated fatty acids. Barramundi larvae reared in an experimental system and fed on four diets, representing combinations of supplemented and unsupplemented rotifers (Brachionus plicatilis ) and supplemented and unsupplemented brine shrimp (Artemia salina ). Supplementation of rotifers and brine shrimp with a commercially available microencapsulated diet increased the levels of several polyunsaturated fatty acids in the food organisms.
Tipo: Text
Palavras-chave: Lates calcarifer; Brine shrimp culture; Growth; Intensive culture; Fatty acids; Feeding; Mortality; Hatcheries; Rearing; Food organisms; Nutritional requirements; Diets; Larvae; Survival.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1421.pdf

Genetic improvement for disease resistance in oysters: a review
Provedor de dados: 5
Autores: Degremont, Lionel; Garcia, Celine; Allen, Standish K., Jr.
Oyster species suffer from numerous disease outbreaks, often causing high mortality. Because the environment cannot be controlled, genetic improvement for disease resistance to pathogens is an attractive option to reduce their impact on oyster production. We review the literature on selective breeding programs for disease resistance in oyster species, and the impact of triploidy on such resistance. Significant response to selection to improve disease resistance was observed in all studies after two to four generations of selection for Haplosporidium nelsoni and Roseovarius crassostrea in Crassostrea virginica, OsHV-1 in Crassostrea gigas, and Martelia sydneyi in Saccostrea glomerata. Clearly, resistance in these cases was heritable, but most of the studies...
Tipo: Text
Palavras-chave: Disease resistance; Oyster; Selection; Pathogen; Genetic; Mortality.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00269/38049/36139.pdf

Physiologie de la maturation et de la ponte chez l'huître creuse Crassostrea gigas
Provedor de dados: 5
Autores: Soletchnik, Patrick; Geairon, Philippe; Razet, Daniel; Goulletquer, Philippe.
The physiological ecology of the Pacific oyster Crassostrea gigas was studied using a conditioning delayed by temperature. Experiments were carried out on five batches and 2 year-classes classified into 6 maturation stages. The scope for growth concerning the stages N*5 and 6 was nearly zero while positive for early stages as well as for the post-spawning stage. Moreover, the 1 year-old oysters showed a significant lowered scope for growth (-110 J/h) compared to adult oysters (-14 J/h), therefore demonstrating the increased sensitivity of young oysters to stressful environmental conditions. By comparing the experimental results with the current models, developed on immature oysters, facilitates the model parameters spécifications during gametogenesis. For...
Tipo: Text
Palavras-chave: Modelling; Ecophysiology; Mortality; Crassostrea gigas; Modèle; Ecophysiologie; Mortalité; Crassostrea gigas.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/rapport-1643.pdf

REseau MOllusques des Rendements Aquacoles de l'huître creuse Crassostrea gigas sur les côtes françaises (REMORA). Résultats de la lagune de Thau pour l'année 2003.
Provedor de dados: 5
Autores: Le Gall, Patrik; Lagarde, Franck; Pichot, Yves; Vercelli, Catherine.
The monitoring network IFREMER/REMORA in Thau lagoon is assessing, on a yearly basis, mortality, growth and quality criteria distributed among 6 stations. Samplings are carried out in March, June, September and December. 2003 is a year with a very important mortality in Mèze and Marseillan area due to an anoxy and an anormal mortality at Bouzigues Nord in december. The growth rate is always better than others French oysters areas. Afnor index is high (beetwen 13.7 and 16.5 in december), so the totality of the oysters are classifed in "Spéciales". Polydora sp. Index is important but the initial stock was first infected. The valve quality is good, with no gelatine, except on Bouzigues South.
Tipo: Text
Palavras-chave: REMORA; France; Lagune de Thau; Huître creuse; Crassostrea gigas; Mortalité; Croissance; Qualité; Polydora; REMORA; France; Thau lagoon; Cupped oyster; Crassostrea gigas; Mortality; Growth; Quality; Polydora.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/00113/22384/20079.pdf

Les risques conchylicoles en Baie de Quiberon. Deuxième partie : le risque de prédation sur l’huître creuse Crassostrea gigas. Rapport final du projet Risco 2010-2013
Provedor de dados: 5
Autores: Mazurie, Joseph; Stanisiere, Jean-yves; Bouget, Jean-francois; Langlade, Aime; Leclerc, Emilie; Quinsat, Kevin; Herve, Gilles; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Meidi-deviarni, Ika; Goubert, Evelyne; Cochet, Helene; Dreano, Alain.
This study (“Risco”), implicating both industry, socio-economic experts and biologists, was funded by the Regional Council of Brittany, for 3 years (2010-2012), to investigate about the causes of oysters (Crassostrea gigas) mortalities in the bay of Quiberon (South Brittany, France). The protocol including both a sonar and video visualization of the bottom, and a monthly survey of 15 experimental oyster structures, allowed to assess the risk due to predation. A clear spatial distribution of the predatory effect was evidenced, with starfish (Asterias rubens and Marthasterias glacialis) predominating in the North-East sector, and boring snails (Ocenebra erinacea and Pterophora inornata) in the South-Center area.. The main mortalities from these predators...
Tipo: Text
Palavras-chave: Baie de Quiberon; Huître; Crassostrea gigas; Risque; Mortalité; Prédation; Étoiles de mer; Bigorneaux perceurs; Risco; Bay of Quiberon; Oyster; Crassostrea gigas; Risk; Mortality; Predation; Starfish; Oyster drills; Risco.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00180/29130/27534.pdf

Prévention des mortalités estivales de naissain d'huîtres creuses. Expérimentations sur estran (Rivière d'Auray, été 1998). 1 : comparaison de différents lots de naissain. 2 : tentative "d'endurcissement» du naissain".
Provedor de dados: 5
Autores: Mazurie, Joseph; Kuntz, Gregoire; Claude, Serge; Hirata, Toshio.
Cupped oysters, Crassostrea gigas, often suffer abnormal mortalities during summer, at one year of age. Both scientists and professionnals are interested in finding practical methods to reduce these mortalities. The present study tries to answer two questions : 1- are there any differences of summer mortalities among various batches of spat available from spat collection areas (Arcachon and Charentes) ?  2- is it possible to improve summer survivals by wintering the spat at high air exposure locations (« hardening » procedure) ?  The first comparison did not reveal any significant difference between the 16 batches of spat tested (mortalities between 5 % and 30 %).  The second comparison in the same summer conditions was not able to show to any improvement...
Tipo: Text
Palavras-chave: Huître creuse; Mortalité; Estran; Vitalité; Endurcissement; Gigas oyster; Mortality; Intertidal zone; Vitality; Hardening.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00105/21665/19243.pdf

REseau MOllusques des Rendements Aquacoles huitre creuse (REMORA) ; Résultats des stations nationales. Année 1998
Provedor de dados: 5
Autores: Fleury, Pierre-gildas; Ruelle, Francois; Claude, Serge; Palvadeau, Hubert; Robert, Stephane; Vercelli, Catherine; Chabirand, Jean-michel; D'Amico, Florence.
The monitoring network IFREMER /REMORA is assessing on a yearly basis, from February to December, mortality, growth and quality criteria of two oyster batches ("juveniles" = one-year class ; and "adults" = two-years class), deployed among various stations of the main French oyster areas. This network is a tool for trend estimations (geographic and chronological, on the national scale) ; it must not be considered as an accurate estimation of professional oyster ongrowings. Based on REMORA results, generally tallied with professional observations, 1998 on the whole was a second year of low mortality. However several areas remained affected by significant mortalities : the baie des Veys (in Normandy), Morlaix and Pen-Bé (in Brittany) and Marennes (in...
Tipo: Text
Palavras-chave: Polydora; Commercial quality; Growth; Mortality; Crassostrea gigas; Pacific cupped oyster; France; REMORA; Polydora; Qualité commerciale; Croissance; Mortalité; Crassostrea gigas; Huître creuse; France; REMORA.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-1638.pdf

Age, growth and mortality of the starry weever Trachinus radiatus Cuvier, 1829 in the Tunisian waters
Provedor de dados: 5
Autores: Hamed, Oussama; Dufour, Jean-louis; Chakroun-marzouk, Nadia; Mahe, Kelig.
Age, growth and mortality of the Starry weever Trachinus radiatus were studied for the first time from 214 individuals collected in the Gulf of Tunis between February 2014 and January 2016. The significant relationship between length-weight was observed for males (a = 0.011, b = 2.992, R2 = 0.981, n = 77) and females (a = 0.010, b = 3.036, R² =0.957, n = 109). Age was estimated by the observation of otoliths transverse thin sections. Age of individuals ranged from 1 to 15 years. The precision was measured by two age estimations from two experts and indicated a good agreement between them (PA = 85.6%, CV = 3.8% and IAPE = 4.1%). The growth parameters of the von Bertalanffy model were TL∞ = 38.41 cm, W∞ = 507.47 g, K = 0.3396 year-1, t0 = 0 year for males...
Tipo: Text
Palavras-chave: Growth; Age; Mortality; Trachinus radiatus; Starry weever; Gulf of Tunis; South-Central Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00477/58905/61467.pdf

Les pratiques culturales peuvent-elles permettre de réduire la surmortalité du naissain d'huîtres creuses? Récapitulatif des essais d'élevage et expérimentations zootechniques menés sur le territoire français entre 2008 et 2010
Provedor de dados: 5
Autores: Soletchnik, Patrick; Mazurie, Joseph; Allain, Gwenhael; Bedier, Edouard; Benabdelmouna, Abdellah; Blin, Jean-louis; Bouquet, Anne-lise; Cochet, Hélène; Degremont, Lionel; Gaussem, Florian; Gervasoni, Erika; Glize, Philippe; Petton, Bruno; Roussel, Pierre-yves; Pernet, Fabrice.
This paper summarizes knowledge about relations between husbandry practices and oyster spat mortalities since 2008 in France. These relations are strictly analyzed from a panel of experiments set on the shore (in outdoor experiments) by Ifremer teams and technical institutes all over French coasts. Results show some practices are able to reduce spat mortality with some influencing factors relevant of spat quality (sanitary status, natural or genetic selection) or husbandry practices. Spat “free” of virus is able to survive up to 90% when it is isolated and confined in ponds or nursery, during an epidemic crisis. When outbreaks occurred in oyster beds, natural or nursery spat died in almost same proportions. In 2010, some studies conducted in Mediterranean...
Tipo: Text
Palavras-chave: Surmortalité; Naissain; Huître creuse; OsHV-1; Pratiques culturales; Mortality; Spat; Cupped oyster; Crassostrea gigas; OsHV-1; Cultural practices.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00032/14280/25847.pdf

Effets de la surcharge en seston minéral sur les palourdes Japonaises adultes Ruditapes philippinarum
Provedor de dados: 5
Autores: Daou, Rafik.
Negative effects of high turbidity, frequently seen at Marennes-Oleron bay in winter, on Manila clam Ruditapes philippinarum are experimentally studied with two samples during gametogenetic period may september 1987. Thes clams reared at high level of silt (178 mg/l) reduce their growth to about 32% the reproductive effort estimated by gameto-somatic weight index is reduced to 40 %. The high turbid ity is responsible of a twice mortality rate.
Tipo: Text
Palavras-chave: Turbidité; Ruditapes philippinarum; Composition biochimique; Effort de reproduction; Mortalité; Turbidity; Ruditapes philippinarum; Biochemical evolution; Reproductive effort; Mortality.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00430/54175/55516.pdf

Impact du sédiment sur les mortalités estivales de naissain d'huîtres creuses Crassostrea gigas en baie de Quiberon
Provedor de dados: 5
Autores: Bedier, Edouard; Knoery, Joel Radford; Fleury, Pierre-gildas; Quiniou, Francoise; Langlade, Aime; Cozic, Amandine; Delesmont, Edith; Delesmont, Régis; Caisey, Xavier; Lecureuil, Laetitia.
The phenomenon of summer mortalities of the Pacific cupped oyster Crassostrea gigas is observed in France since the beginning of the 90's. These mortalities are classically associated to younger stages and summer temperatures and occur during the reproduction period of the animal. The studies undertaken during the project Morest (2001-2005), showed that a number of biological and environmental risks, the interaction of them induces lethal stresses for animals in physiological weakness, exists in summer. Among these risks, that which is withstood by the oysters bred close to the sediment proved to be significant in intertidal areas. In Quiberon bay (southern Brittany, France), the breeding practices of sowing oysters in deep water is thus likely to expose...
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Mortalité; Sédiment; Composé réduit; Flux; Sulfure; Ammonium; Oyster; Crassostrea gigas; Mortality; Sediment; Reduced compound; Flux; Sulphide; Ammonia.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00108/21956/19550.pdf

Insecticidal activity of venomous saliva from Rhynocoris fuscipes (Reduviidae) against Spodoptera litura and Helicoverpa armigera by microinjection and oral administration
Provedor de dados: 80
Autores: Sahayaraj,K; Vinothkanna,A.
Rhynocoris fuscipes is a potential predator of many economically important pests in India. In the present study, its venomous saliva (VS) was collected by milking and diluted with HPLC grade water to different concentrations (200, 400, 600, 800 and 1000 ppm). Microinjection of Rhynocoris fuscipes VS was more toxic than its oral administration in Helicoverpa armigera (cotton bollworm) and Spodoptera litura (tobacco cutworm). Thus, R. fuscipes VS was found to be toxic to third instar S. litura and H. armigera with respective LD50s of 846.35 and 861.60 ppm/larva at 96 hours after microinjection. The current results showed that VS of Rhynocoris fuscipes caused mortality of H. armigera and S. litura. Active peptides from VS may be isolated, identified and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salivary venom; Microinjection; Oral administration; Mortality; Rhynocoris fuscipes; Biological control.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992011000400016

Epidemiological profile of snakebites in Morocco
Provedor de dados: 80
Autores: Arfaoui,A; Hmimou,R; Ouammi,L; Soulaymani,A; Mokhtari,A; Chafiq,F; Soulaymani-Bencheikh,R.
The present work aims to find the epidemiological profile of snakebites in Morocco through a retrospective study of 1,423 snakebite cases that occurred between 1992 and 2007. Data were obtained from medical charts of envenomation at the Poison Control and Pharmacovigilance Center of Morocco. Results revealed that 86% of the snakebites had occurred in rural areas and that males were significantly more affected than females at a sex ratio of 23:20. Furthermore, 35% of the bites happened during the summer, with a peak of 215 cases in June (15.1%). We also discovered that 67.3% of the patients were bitten during the day. The age group that comprised the most agriculturally active persons, from 20 to 44 years old, was the most affected by snakebites (551...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Snakebites; Epidemiology; Mortality; Morocco.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000400005

Candidemia in a brazilian tertiary hospital: microbiological and clinical features over a six-year period
Provedor de dados: 80
Autores: Mondelli,AL; Niéro-Melo,L; Bagagli,E; Camargo,CH; Bruder-Nascimento,A; Sugizaki,MF; Carneiro,MV; Villas Boas,PJF.
Yeasts are becoming a common cause of nosocomial fungal infections in immunocompromised patients. Such infections often develop into sepsis with high mortality rates. The aim of this study was to evaluate some of the numerous factors associated with the development of candidemia. Medical records were retrospectively analyzed of 98 Candida spp. patients. Results showed that the most prevalent risk factors for developing candidemia were: antibiotics and antifungal agents (93.9% and 79.6%, respectively); the use of central venous catheter (93.9%); mechanical ventilation (73.5%); and parenteral nutrition (60.2%). The main species of Candida found were: C. parapsilosis (37.76%), C. albicans (33.67%); and others (28.57%). C. glabrata showed the highest mortality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Candidemia; Mortality; Associated factors; Candida albicans.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000200015

Trap-nest occupation by solitary wasps and bees (Hymenoptera: Aculeata) in a forest urban remanent
Provedor de dados: 82
Autores: Loyola,Rafael D.; Martins,Rogério P.
Temporal variation of solitary wasps and bees, nesting frequency, mortality, and parasitism were recorded from a remanent forest in Belo Horizonte, MG, Brazil. Wasps and bees were collected in trap-nests placed in areas with 25, 100, and 400 m², from February to November 2004. The 137 trap-nests collected contained 11 species of wasps and bees. Wasps occupied most nests (75%). Occupation peaks occurred in March (25%) and September (26%); in June, the lowest occupation (2%) was observed. Except for Trypoxylon (Trypargilum) lactitarse Saussure, no significant correlation was found between number of occupied nests, and temperature and rainfall means. In the nests, 48% of the immature specimens died; 13% of the nests were parasitized. Total death and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nesting behavior; Mortality; Parasitism; Trypoxylon lactitarse; Auplopus militaris.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000100006

Effect of spinosad bait against Ceratitis capitata (Wied.) and Anastrepha fraterculus (Wied.) (Diptera: Tephritidae) in laboratory
Provedor de dados: 82
Autores: Raga,Adalton; Sato,Mário E.
Laboratory studies were conducted to determine the mortalities caused by spinosad in Ceratitis capitata (Wied.) and Anastrepha fraterculus (Wied.). Spinosad formulated bait, diluted in water, was compared with baits of malathion, trichlorfon, fenthion and deltamethrin. The lethal time increased for C. capitata (medfly) adults fed in lower concentrations of spinosad. The LT50 values for C. capitata were estimated in 106, 126 and 154 min for 80, 8 and 4 ppm, respectively. No differences at LT50 were observed for different ages, 2-3d, 3-5d and 5-7d old C. capitata exposed to 80 ppm. Both fruit fly species presented similar pattern of survival when treated with spinosad at 80 ppm. In general, fenthion and trichlorfon showed LT50 values lower than spinosad for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Fruit fly; Insecticide; Mortality.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000500014

Morphology of the immatures and biology of Chinavia longicorialis (Breddin) (Hemiptera: Pentatomidae)
Provedor de dados: 82
Autores: Matesco,Viviana C; Schwertner,Cristiano F; Grazia,Jocelia.
Chinavia longicorialis (Breddin) is recorded only in Brazil, Argentina and Uruguay on host plants of at least three different families. Adults and nymphs were reared under standard controlled conditions (24 ± 1°C; 70 ± 10% RH; 12hL:12hD), and fed on green beans (Phaseolus vulgaris L.). Eggs and first instars of C. longicorialis are very similar to those of other species of Chinavia; however, the presence of orange maculae at the thoracic pleura is exclusive of first instars of C. longicorialis. Third to fifth instars have abdominal maculae divided by pseudo-sutures, a diagnostic feature of C. longicorialis nymphs. Light and dark morphs were observed for third, fourth and fifth instars. Head width measurements did not overlap between consecutive instars....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Green stink bug; Egg; Nymph; Mortality; Developmental time.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2009000100007

Population structure, growth and fishery yield of Leporinus acutidens (Valenciennes, 1837) (Teleostei: Anostomidae) in Yacyretá Reservoir (Argentina)
Provedor de dados: 83
Autores: Araya,Patricia R.; Agostinho,Angelo A.; Bechara,José A.
The population structure and dynamics of Leporinus acutidens (Valenciennes, 1837), upstream from Yacyretá Dam (Upper Paraná River, Argentina) were analyzed for their relation to age, condition factor, growth, mortality and fishery yield. The pre- (1990-94) and post- (1995-98) filling phases of the reservoir were compared with regard to age structure, condition factor, and the length/weight relationship of fish. Fish sampling was carried out at four sampling sites following a longitudinal gradient along the river. The catches took place monthly using eight monofilament gillnets (mesh 40 to 160 mm). The growth marks on the scales were annual (9-year maximum). The study of the variation in the monthly averages of the scale marginal increments revealed that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Mortality; Dam; Paraná River.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000100007

Age, growth, mortality and yield per recruit of the dourado Salminus brasiliensis, Corumbá Reservoir, Goiás State, Brazil
Provedor de dados: 83
Autores: Tos,Claudenice Dei; Gomes,Luiz Carlos; Agostinho,Angelo Antônio; Batista,Rosana Paulo.
In order to evaluate the fate of the migratory species dourado Salminus brasiliensis in the first years of impoundment in Corumbá Reservoir we estimated age, growth, mortality and yield per recruit. Samplings were carried out monthly in Corumbá Reservoir and its main tributaries (Goiás State) from March 1998 to February 1999 using gillnets. After one year of impoundment, age was estimated from scales and the maximum number of rings was six for males and five for females. Rings are formed annually in May and June. The asymptotic length and growth rate for males and females were 37.1 cm and 0.77 and 56.6 cm and 0.52, respectively. A dominance of juveniles was verified in the reservoir and its tributaries. The instantaneous total mortality rate (Z) was 1.59...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth model; Mortality; Fishery yield; Dam; Characidae.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200014

Freshwater temperature in the state of Rio Grande do Sul, Southern Brazil, and its implication for fish culture
Provedor de dados: 83
Autores: Garcia,Luciano de Oliveira; Copatti,Carlos Eduardo; Wachholz,Flávio; Pereira Filho,Waterloo; Baldisserotto,Bernardo.
In this study we verified data of water temperatures collected by CORSAN-RS from 1996 to 2004 in several cities of the state of Rio Grande do Sul, southern Brazil, and analyzed the possibility of raising the most cultivated fish species in Brazil. The water temperature from 1996 to 2004 was 16 to 28ºC in summer, 17 to 23ºC in fall, 14 to 17ºC (down to 9ºC in the coldest months) in winter and 14 to 21ºC in spring. Native species of this state, such as silver catfish (Rhamdia quelen), traíra (Hoplias malabaricus), dorado (Salminus brasiliensis), pintado (Pimelodus maculatus), as well as carps (family Cyprinidae), are resistant to the low winter temperatures. These species have a lower growth rate in coldest months (winter/spring) but a good development in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish growth; Mortality; Growth; Freshwater fish; Water temperature.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200016

Population dynamics of Prochilodus nigricans (Characiformes: Prochilodontidae) in the Putumayo River
Provedor de dados: 83
Autores: Bonilla-Castillo,César A.; Córdoba,Edwin Agudelo; Gómez,Guber; Duponchelle,Fabrice.
ABSTRACT The black prochilodus (Prochilodus nigricans) is one of the most landed scaled fish species of the middle and upper parts of the Putumayo River, in the tri-national area between Colombia, Ecuador and Peru. Despite its importance, biological information about this species is too scant to guide fisheries management in this portion of the Colombian Amazon. In this study, 10884 individuals were sampled in the fish markets of Puerto Leguízamo between 2009 and 2017. This sampling was used to document reproductive patterns, but also growth and mortality parameters from length frequency distributions. The size at which all fish were mature was 22 cm Ls, which should be the established as the minimum size of capture to ensure that all fish have had a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Black prochilodus; Colombia; Growth; Mortality; Reproduction.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200212

Population size and survivorship for juvenile lemon sharks (Negaprion brevirostris) on their nursery grounds at a marine protected area in Brazil
Provedor de dados: 83
Autores: Freitas,Renato Hajenius Aché de; Rosa,Ricardo S.; Wetherbee,Bradley M.; Gruber,Samuel H.
Sharks face a number of obstacles for surviving their first several years of life and many species occupy nursery areas. Although estimates of survival, particularly for young age classes, are essential for assessing, monitoring and effectively managing animal populations, there have been relatively few calculations of survival within shark populations and even fewer estimates based on direct methods for sharks on their nursery grounds. We used tag-recapture methods to estimate the population size and survival of juvenile lemon sharks (Negaprion brevirostris) on their nursery grounds at Atol das Rocas, a marine protected area in Brazil. Sharks were sampled from1999 to 2003. Population size estimates ranged from 12 to 100 juvenile sharks and survival...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mortality; Tag-recapture; Atol das Rocas; Conservation; Carcharhinidae.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000200011

Adjustments in population and reproductive dynamics of native and non-native congeneric species during 26 years after invasion
Provedor de dados: 83
Autores: Rodrigues,Amanda Cantarute; Santos,Natália Carneiro Lacerda dos; Baumgartner,Matheus Tenório; Gomes,Luiz Carlos.
ABSTRACT We aimed to improve the understanding of the establishment of Serrasalmus marginatus (non-native), which was followed by a decrease in the abundance of Serrasalmus maculatus (native) in the upper Paraná River floodplain. We estimated age, mortality rate, length and age at first maturity and variations in gonad development in three time-periods along a 26-year truncated time scale for both species. Population and reproduction parameters of both species showed substantial fluctuations among periods. Most age classes were sampled in all time-periods, but with considerable difference in abundance, with predominance of older individuals in the second time-period and younger individuals in the third time-period for both species. The mortality rates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age structure; Biological invasions; Length at first maturity; Mortality; Serrasalmus.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100202

Chemotherapeutic Management of Acute Outbreaks of Caecal Coccidiosis in Broiler Birds in Bangladesh
Provedor de dados: 19
Autores: Samad, Md Abdus; Chakraborty, S. R.
Palavras-chave: Eimeria tenella; Outbreaks; Broiler birds; Morbidity; Mortality; Esb; Embazin.
Ano: 1993
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/197

北海道十勝地方の2つの小学校における鳥類のガラス衝突死
Provedor de dados: 19
Autores: 柳川, 久; 澁谷, 辰生; Yanagawa, Hisashi; Shibuya, Tatsuo.
1.北海道十勝管内の２か所の小学校で，建物の周辺環境（植生や人工建造物），鳥類相と衝突死する鳥類の個体数の関係を調べるため，1994年６月から12月まで調査を行なった．調査を行なった新得町立屈足小学校と佐幌小学校はガラスを多用した同型の体育館を有していた．  2.ラインセンサスの結果，屈足小学校では25種498個体，佐幌小学校では25種516個体の鳥類が観察された．屈足小学校では，スズメが最も多く（178個体. 2000. 35.7％），次いでコムクドリ（58個体. 2000. 11.6％），アオジ（53個体. 2000. 10.6％），ハクセキレイ（50個体. 2000. 10.0％）が多かった．佐幌小学校ではスズメ（152個体. 2000. 29.5％）が最も多く，次いでシメ（78個体. 2000. 15.1％）が多かった．  3.佐幌小学校では10種26個体のガラス衝突した鳥類が拾得されたが，屈足小学校では１個体のみであった．衝突死が最も多い鳥類はシメで11個体（40.7％）であった．死亡した鳥類はほとんど（85.2％）が幼鳥であった．  4.佐幌小学校の周辺では，巣立ちしたシメの幼鳥の群れが採食するのがしばしば観察された．また，佐幌小学校にはスズメ類やムクドリ類のための巣箱も架設されており，ホオジロ類が好むやぶ地も備わっていた．  5.両校間の衝突死個体数の差は，特にシメなどの建物周辺で繁殖，採餌する鳥類の個体数の違いに起因すると思われた．
Palavras-chave: ガラス衝突; 死因; 鳥類群集; Bird; Hokkaido; Mortality; Population; Window-collisions.
Ano: 2000
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2300

Growth, mortalities and yield per recruit of the shrimp fish scad Alepes djedaba (Forskal) (F. Carangidae), from Abu Qir Bay, Eastern Alexandria, Egypt
Provedor de dados: 20
Autores: El-Sayed, H.Kh.A.
Growth and population dynamics parameters of Alepes djedaba as an exotic carangid fish species from Red Sea into the Levant Basin of the Mediterranean Sea, were investigated. Fish samples were obtained from purse-seiners operating during the day time from Jan. to Dec. 2003 in Abu Qir Bay, Eastern Alexandria. The results obtained show that back-calculated lengths (based upon otolith readings) for the first; second and third age groups were 10.38; 15.4 and 19.32 cm TL respectively, the estimated Bertalanffy growth parameters were L∞=33.29 cm, K=0.2473 and t0= -0.51. The Length-weight relationship was represented by the formula: Log W=-1.9245+2.9762 Log L. Total mortality (Z), natural mortality (M) and fishing mortality (F) were 1.85; 0.62 and 1.23...
Tipo: Journal Contribution
Palavras-chave: Mortality; Yield/recruit; Growth; Carangidae.
Ano: 2005
URL: http://hdl.handle.net/1834/4995

Estimación preliminar de la mortalidad natural de la merluza de cola (Macruronus magellanicus) en la plataforma sur-patagónica (Argentina)
Provedor de dados: 20
Autores: Ehrhardt, N.M.; Prenski, L.B.
Long-tail hake, Macruronus magellanicus, is an important species in the Argentinean southern demersal species complex. Significant development of these fisheries since 1987 is indicative of the need to assess the hoki resource and for this purpose knowledge about some of the fundamental population parameters, such as natural mortality rate, is required. Knowledge on the natural mortality rate is an important element for the quantification of the resilience of the stock to fishery exploitatuib. In this study an algorithm for estimating natural mortality of hoki is developed which is based on information on abundance at age obtained from area swept methods and from age composition in the landings. As a result, natural mortality rates for ages 5 to 9 ranged...
Tipo: Journal Contribution
Palavras-chave: Demersal fisheries; Mortality; Abundance; Demersal fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1996
URL: http://hdl.handle.net/1834/1962

Análisis de la distribución y dinámica poblacional de lenguados de la Provincia de Buenos Aires (Pisces, Bothidae)
Provedor de dados: 20
Autores: Fabré, N.N.
Los lenguados constituyen un importante recurso pesquero en el Mar Argentino. Más que en los volúmenes desembarcados (9 .731 t en 1991), esta importancia se centra en su elevado valor de comercialización debido a la alta calidad de su carne. Atendiendo a los desembarques totales realizados en el Mercado de Concentración Pesquera de Mar del Plata, los lenguados ocupan el octavo lugar. Estos desembarques están compuestos principalmente por especies de porte mediano a grande pertenecientes al género Paralichthys, y por ejemplares de tamaño mediano o pequeño de las especies Xystreuris rasile, y en menor proporción, Paralichthys isosceles. Este recurso es explotado, en el sector bonaerense, por las flotas de rada o ría y costera, mientras que la flota de altura...
Tipo: Theses and Dissertations
Palavras-chave: Geographical distribution; Population dynamics; Population structure; Growth; Reproduction; Mortality; Environmental effects; Ecosystems; Marine fish.
Ano: 1992
URL: http://hdl.handle.net/1834/5158

Diferencias entre parámetros vitales de las poblaciones bonaerense y patagónica de anchoíta argentina.
Provedor de dados: 20
Autores: Hansen, J.E.
Two pelagic cruises were carried out by R/V"Cap.Oca Balda" in the spring of 1988 and the following summer. Anchovy samples were taken in order to increase the knowledge on the differences between two main stocks of the species, inhabiting the Argentine Sea from 35°S southwards, with distributional boundary situated at about 41°S. Length-weight relationships were statistically different among populations. Weight-at-length values calculated for the summer cruise were higher tha sprin estimates, and they were also higher within Northern individuals. The differences were not statistically significant between stocks, but there are reasons to believe that if ages 1 and 6 of both stocks had been represented those differences would have been increased. Mortality...
Tipo: Journal Contribution
Palavras-chave: Length-weight relationships; Growth; Mortality; Size distribution; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1994
URL: http://hdl.handle.net/1834/1933

Biologie et dynamique des populations d’Anchois (Engraulis encrasicolus) des côtes mauritaniennes.
Provedor de dados: 20
Autores: Ba, I.S.
Résumé:  Cette étude traite de la biologie et de la dynamique des populations d’anchois (Engraulis encrasicolus) des côtes mauritaniennes. Après un bref rappel des conditions climatiques et hydrobiologiques de la région, une tentative de mise en évidence de race ou population locale a montré que cette espèce pourrait être rattachée à la population méridionale atlantique du Golfe de Gascogne. En  Mauritanie, l’Anchois n’est pêché que de façon accessoire. Les captures les plus abondantes sont réalisées de mai à Septembre essentiellement dans la zone nord où l’on observe un upwelling permanent. Pour évaluer la taille du stock, des estimations de biomasse par échointégration ont été effectuées, mais celles-ci n’ont pas permis de donner un ordre de grandeur...
Tipo: Theses and Dissertations
Palavras-chave: Anchovy fisheries; Upwelling; Population dynamics; Mortality.
Ano: 1988
URL: http://hdl.handle.net/1834/676

Estimación de parámetros poblacionales del efectivo de sardina fueguina (Sprattus fuegensis) de la costa continental Argentina.
Provedor de dados: 20
Autores: Hansen, J.E.
Patagonian sprat is probably the only pelagic fish species having a considerable biomass within the Argentine Seasouth of 45ºS. There are two populations, the first inhabiting mainly the coastal region around Malvinas Islands and the other close to the coast off Santa Cruz and Tierra del Fuego Provinces, including the fuegian channels. Some results of two seasonal (autumn and spring) patagonian sprat assessment surveys carried out during 1996 are shown. The autumn cruise covered the area between 50° and 55°S, from the continental coast up to 60 m depth, whereas the spring survey extended upto 90 m depth including Le Maire Strait and part of the Beagle Channel. During both seasons, in waters ranging 6.2 - 8.8°C temperature, the species distributed very...
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Length-weight relationships; Sexual maturity; Growth; Mortality; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://hdl.handle.net/1834/2530

Aspectos de la biologia reproductiva de la castaneta (Cheilodactylus bergi) en la zona comun de pesca Argentino-Uruguaya
Provedor de dados: 20
Autores: Wöhler, O.C.
Length and age at first maturity was estimated, and the distribution of the spawning stock of castaneta (Cheilodactylus bergi) was analyzed, with the aim of understanding the spawning activity and its relation with oceanographic parameters. Samples came from two research cruises carried out in the Argentine-Uruguayan Common Fishing Zone (CFZ) (SW Atlantic, between 34 degree and 39 degree 30'S), during the end of spawning period (May-June) of 1991 and 1993. Length at first maturity was estimated in 21.34 cm and 23.69 cm of total length, for males and females respectively. Age at first maturity estimated for sexes combinated corresponding to 2.60 years. A spawning area in the north (between 35 degree and 37 degree S) was determined, showing a high incidence...
Tipo: Journal Contribution
Palavras-chave: Fishing grounds; Sexual maturity; Spawning seasons; Mortality; Environmental conditions.
Ano: 1997
URL: http://hdl.handle.net/1834/5795

Mortality rate, exploitation and recruitment in Oreochromis niloticus (Linnaeus) in Nyanza Gulf of Lake Victoria, Kenya
Provedor de dados: 20
Autores: Getabu, A.
An analysis was done on length frequency data to study mortality,     exploitation rate and recruitment in Oreochromis niloticus in Nyanza     Gulf, Lake Victoria. The fishing mortality (F) and natural mortality     (M) were 0.468 y super(-1) and 2.0 y super(-1) respectively. The     exploitation rate was 57.2%. Yield per recruit under the fishing     regime was 250 g. Its predicted value at maximum sustained yield was     530 g, which could be obtained at a fishing mortality of 1.5 y     super(-1). The recommended value was 500 g to be obtained at a fishing     mortality of 1.0 y super(-1). The maximum biomass per recruit (B/R)     was 1132.48 g while the optimum was 1068.38 g. The biomass recruit     under the present fishing regime is 534.19 g which is...
Tipo: Proceedings Paper
Palavras-chave: Oreochromis niloticus; Exploitation; Fishery management; Lake fisheries; Mortality; Fishery management; Lake fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_4159; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1994
URL: http://hdl.handle.net/1834/1175

Variación temporal de la abundancia de huevos y larvas de Engraulis anchoita en el litoral norpatagónico entre enero y abril de 2001. Crecimiento y mortalidad larval
Provedor de dados: 20
Autores: Brown, D.R.; Leonarduzzi, E.; Averbuj, A.; Livore, J.P.
Argentine anchovy (Engraulis anchoita) eggs and larvae abundance distribution patterns in the Argentine northpatagonian littoral during January-April 2001 were analyzed. As the season progressed, a process of decline in the reproductive activity was observed. Larval growth and mortality rates were established. Age determinations were performed analyzing otoliths daily increments. The 0.43 mm day-1 growth rate average did not show space-time differences, fact attributed to the homogeneity of the thermal field. The 0.32 d-1 January natural mortality rate was determined by exponential decline. Mortality rates, estimated with the mortality-aggregation model, were considered dependent on the larval size. The value ranges (d-1) were 0.07-0.49, 0.05-0.61 and...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Growth; Otoliths; Mortality.
Ano: 2013
URL: http://hdl.handle.net/1834/5500

Evaluación del estado de explotación de la merluza de cola Macruronus magellanicus en la plataforma sur-argentina.
Provedor de dados: 20
Autores: Prenski, L.B.; Ehrhardt, N.M.; Legault, C.
Hoki, Macruronus magellanicus, is an important resource in the Argentinean multispecific southern demersal fishery. The species is distributed South of 46°S between the 50 and 200 meter isobaths. Thesouthern demersal fishery was almost nil prior to 1987, becoming more relevant toward the end of the 1980's. International fleets operating through several fishery agreement were those of the ex-Soviet Union,Bulgaria and Japan. Research on the abundance of hoki resources were initiated in the early 1970's; however, fishery research have been noticeably enhanced since 1992. In this study existing information on the Argentinean hoki fishery is integrated and an assessment of the status of exploitation of the species is carried out.As a result of the analyses, a...
Tipo: Journal Contribution
Palavras-chave: Fishery management; Mortality; Abundance; Stock assessment; Gadoid fisheries; Demersal fisheries; Adaptations; Fishery management; Stock assessment; Demersal fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1997
URL: http://hdl.handle.net/1834/1924

Enfermedades coralinas y su investigación en los arrecifes colombianos
Provedor de dados: 20
Autores: Gil-Agudelo, D.L.; Navas-Camacho, R.; Rodríguez-Ramírez, A.; Reyes-Nivia, M.C.; Bejarano, S.; Garzón-Ferreira, J.; Smith, G.W.
Los arrecifes coralinos, uno de los más bellos e importantes ecosistemas de nuestro planeta, han existido por más de 200 millones de años, sobreviviendo a grandes cambios durante su historia (glaciaciones, extinciones masivas, entre otros). Sin embargo, durante las últimas tres décadas se han registrado grandes y súbitos cambios en el medio marino que a juicio de algunos investigadores ponen en peligro la supervivencia de corales y arrecifes coralinos. Uno de los mayores problemas que enfrentan los arrecifes coralinos hoy en día es la aparición de enfermedades que atacan a los corales, la base de estos ecosistemas. No existe un concenso sobre si estas enfermedades son realmente nuevas o no, pero lo que sí se sabe es que algunas de ellas están creando...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Mortality; Coral reefs; Mortality; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2009
URL: http://hdl.handle.net/1834/3616

Aspectos de la biologia reproductiva de la castaneta (Cheilodactylus bergi) en la zona comun de pesca Argentino-Uruguaya
Provedor de dados: 20
Autores: Wöhler, O.C.
Length and age at first maturity was estimated, and the distribution of the spawning stock of castaneta (Cheilodactylus bergi) was analyzed, with the aim of understanding the spawning activity and its relation with oceanographic parameters. Samples came from two research cruises carried out in the Argentine-Uruguayan Common Fishing Zone (CFZ) (SW Atlantic, between 34 degree and 39 degree 30'S), during the end of spawning period (May-June) of 1991 and 1993. Length at first maturity was estimated in 21.34 cm and 23.69 cm of total length, for males and females respectively. Age at first maturity estimated for sexes combinated corresponding to 2.60 years. A spawning area in the north (between 35 degree and 37 degree S) was determined, showing a high incidence...
Tipo: Journal Contribution
Palavras-chave: Fishing grounds; Sexual maturity; Spawning seasons; Mortality; Environmental conditions.
Ano: 1997
URL: http://hdl.handle.net/1834/5793

Estudio de algunos aspectos del ciclo vital de la merluza de cola Macruronus magellanicus, Lonnberg, 1907.
Provedor de dados: 20
Autores: Giussi, A.R.
Long tailed hake Macruronus magellanicus, is a demersal fish,distributed in the SW Atlantic Ocean, in Malvinas Current waters,from 36° and 55°S, mainly between 50m and 200m depth. The species is also distributed in Chilenian waters in the Pacific Ocean, being caught in the Magellan Strait and the Beagle Channel. Age determination was estimated with the sagittae otoliths, in which only one ring is formed during the year. Growth parameters were calculated directly and with back calculated methodology, no differences were observed between the results. Differences in growth sexes were evident from 3 years old. The oldest age observed was 13. Different distributional areas of adults through out the year could suggest a migratory movement in northern waters of...
Tipo: Theses and Dissertations
Palavras-chave: Life cycle; Growth; Otoliths; Age determination; Reproduction; Population dynamics; Mortality; Population structure; Fishery surveys; Fishing grounds; Geographical distribution; Back calculation; Growth; Otoliths; Age determination; Population structure; Geographical distribution; Life cycle; Reproduction; Population dynamics; Mortality; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_4317; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_6111; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_2947.
Ano: 1996
URL: http://hdl.handle.net/1834/1488

Resultados de una campaña de investigación sobre la anchoíta (Engraulis anchoita)del sector bonaerense en el otoño de 1983. Distribución, abundancia y algunos aspectos biológico-pesqueros
Provedor de dados: 20
Autores: Hansen, J.E.; Gru, D.L.; Perrotta, R.G.
An extensive area of the continental shelf -between 37°20' and 34°40'S - was reviewed through hidroacoustical methods in order to evaluate the anchovy biomass. Within the area of highest concentration, further data on anchovy abundance were recorded, and fish samples were taken. Large anchovy shoals were located at about 170 nm from Mar del Plata, mainly in zones with sharp changes in oceanographic conditions. The distribution of the species was not uniform, but "contagious", and the log-normal distribution provided the best fit for the echo-integrator recorded data. The biomass was estimated at 1,061,727 tons (Confidence limits in between 921,010 and 1,223,930 tons). Some parameters of the population were estimated, such as: lenght-weight relationship,...
Tipo: Journal Contribution
Palavras-chave: Length-weight relationships; Sex ratio; Age composition; Growth curves; Echo surveys; Mortality; Age composition; Sex ratio; Mortality; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1986
URL: http://hdl.handle.net/1834/2038

Varamiento de cachalotes (Physeter macrocephalus) (Cetacea: Physeteridae) en la costa ecuatoriana por interacción con pesquerías
Provedor de dados: 20
Autores: Haase, B.; Félix, F.
El objetivo del presente trabajo es dar a conocer los varamientos de cachalotes en la costa ecuatoriana y mostrar que en algunos casos tales hechos tuvieron una relación directa con actividades pesqueras.
Tipo: Journal Contribution
Palavras-chave: Marine mammals; Protected resources; Stranding; Mortality; By catch; Mortality; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1996
URL: http://hdl.handle.net/1834/2192

Análisis del crecimiento y la mortalidad de Anisotremus interruptus (Gill) (Perciformes: Haemulidae) en la Costa de Colima, México
Provedor de dados: 20
Autores: Espino-Barr, E.; Gallardo-Cabello, M.; González-Orozco, F.
This paper deals with the growth and mortality analysis of the burrito grunt Anisotremus interruptus on the coast of Colima, México. The estimated growth parameters are: L ¥ = 50.59 cm; W ¥ = 5,051.04 g; k = 0.147 years-1; to = -0.916 years; A0.95 = 19.46 years. Most of the growth occurred during the first year of life, when the grunt grows 12.52 cm, the second year it grows 4.95 cm and the third, 4.60 cm. The highest value of the condition index took place between February and September. The total mortality rate (Z) was calculated as 0.53 years-1. These values are basic for the plan of administration of the fishery of this species.
Tipo: Journal Contribution
Palavras-chave: Growth; Mortality; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2004
URL: http://hdl.handle.net/1834/3060

Comparación temporal en la estructura de una comunidad coralina en primeros estados de sucesión, Isla de San Andrés, Colombia
Provedor de dados: 20
Autores: Jaramillo-González, J.; Acosta, A.
Los arrecifes coralinos del mundo han sufrido un declive durante las pasadas tres décadas. Estos cambios se han evaluado en arrecifes en franja; sin embargo, se desconoce si los tensores causantes de dichos cambios afectan la dinámica de una comunidad coralina en los primeros estados de la sucesión antes del desarrollo de un arrecife. Para resolver este interrogante, se monitoreó durante 2004, 2005 y 2006 una comuniddad coralina aislada en San Andrés. Se compararon temporalmente la abundancia, cobertura y mortalidad parcial sufrida por la comjnidad coralina y sus poblaciones de coral dominantes. La comunidad coralina no presentó variación estadística en riqueza, abundancia, cobertura, ni en área de mortalidad parcial. Sin embargo, esta comunidad si varió...
Tipo: Journal Contribution
Palavras-chave: Coral; Dynamics; Mortality; Mortality; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2009
URL: http://hdl.handle.net/1834/3605

Recomendaciones para el manejo y explotación del recurso pesquero de merluza común (Merluccius hubbsi) del Golfo San Matías durante el año 1999
Provedor de dados: 20
Autores: González, R.A.; Morsan, E.M.
En este informe se aborda el análisis del estado de conservación del efectivo pesquero de merluza común (Merluccius hubbsi) del Golfo San Matías a partir de la aplicación de métodos del tipo analítico (Análisis de Cohorte). A partir de este diagnóstico (estimaciones de las tasas de mortalidad por pesca anual y del número de reclutas retrocalculado para el año 1998), se realizan proyecciones del rendimiento en peso del stock, de la biomasa total y del rendimiento en términos económicos, aplicando para ello una versión del Análisis de Rendimiento por Recluta
Tipo: Report
Palavras-chave: Fishery management; Stock assessment; Yield/recruit; Recruitment; Mortality; Economic feasibility; Fishery management; Stock assessment; Mortality; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://hdl.handle.net/1834/3721

Regulación denso-dependiente del crecimiento individual de la almeja púrpura (Amiantis purpurata, Lamarck 1818)
Provedor de dados: 20
Autores: Pappalardo, M.P.; Morsan, E.M.
In this study we analyze growth, mortality and estimated biomass trend of purple clam, Amiantis purpurata, population placed in Playa Villarino, (Northern San Matias gulf, Argentina) in the southern most boundary of its geographical distribution. Previously, the population structure was described composed by three consecutive cohorts settled among 1978-1980, and the individual growth rate showed high spatial variability. The hypothesis to test in this study is that growth rate is regulated by local biomass. We choice four sites with different densities, to assess growth rate, natural mortality and retrospective estimated biomass trend. During February 2003, densities and growth rate (using external growth bands measurements) were analyzed matching with a...
Tipo: Journal Contribution
Palavras-chave: Growth rate; Clam fisheries; Mortality; Growth curves; Density dependence; Biomass; Growth; Biomass.
Ano: 2005
URL: http://hdl.handle.net/1834/4385

Patrones de distribución espacio-temporal de los estadíos embrionarios y larvales de la anchoíta (Engraulis anchoita Hubbs &amp; Marini) a micro y macro-escala. Su relación con la supervivencia
Provedor de dados: 20
Autores: Sánchez, R.P.
This dissertation is focused on the study of implications of spatial patterns on survival of eggs and larvae and subsequent recruitment of the SW Atlantic anchovy, Engraulis anchoita. The study of distribution patterns is encompassed within the conceptual framework of the analysis of reproductive strategies of marine bony fish, as adaptations that enable them to cope with and actively exploit environmental variability, regulating their abundance and avoiding extinction. The SW Atlantic anchovy, is ideally suitable for studies on reproductive biology and recruitment on a comparative basis. Its spawning and nursery grounds are located in very diverse ecosystems. This variety refers to their physico-chemical properties, carrying capacity, the influence of...
Tipo: Theses and Dissertations
Palavras-chave: Fish eggs; Fish larvae; Recruitment; Ichthyoplankton; Biomass; Reproduction; Developmental stages; Mortality; Stock assessment; Environmental conditions; Biomass; Developmental stages; Stock assessment; Fish larvae; Reproduction; Mortality; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2230; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1995
URL: http://hdl.handle.net/1834/1491

Dynamique de la population de Sandre  Stizostedion Lucioperca
Provedor de dados: 20
Autores: Toujani, R.; Kraiem, M.M.
L’étude de la dynamique de population du sandre Stizostedion lucioperca dans la retenue du barrage de Sidi Salem (nord de la Tunisie) a été réalisée durant deux saisons : avril 1996 - mars 1998 . Elle a porté sur un échantillon de 1325 individus capturés par les pêcheurs professionnels. Cette étude a montré que: - La taille moyenne individuelle des sandres captures est inférieure à 30 cm pour une proportion supérieure à 75 % . - La taille de recrutement dans la pêcherie estimée à 18 cm est très inférieure à la taille de première maturité sexuelle de l’ espèce qui est de 24 cm. - La taille et la masse individuelles moyennes des sandres capturés se sont améliorées durant la saison 1997 par rapport à celle de 1996. - Le taux de mortalité par pêche des groupes...
Tipo: Journal Contribution
Palavras-chave: Taille; Mortalité; Length-weight relationships; Recrutement; Masse; Recruitment; Stizostedion lucioperca; Mortality; Freshwater fish; Population dynamics; Pike perch; Http://aims.fao.org/aos/agrovoc/c_5877.
Ano: 2002
URL: http://hdl.handle.net/1834/221

Crecimiento y mortalidad de la castañeta Cheilodactylus bergien la zona común de pesca Argentino-Uruguaya
Provedor de dados: 20
Autores: Wöhler, O.C.
Growth parameters based on age assignation, length-weight relationship and mortality rates of castañeta Cheilodactylus bergi were studied. Samples came from landings at Mar del Plata Port(Buenos Aires province, Argentina) during 1989, and from a research cruise carried out in the Argentine-Uruguayan Common Fishing Zone(CFZ) during 1991. Castañeta is a longeval demersal species. The growth parameters of von Bertalanffy special model were: 1) Lý 31.95,34.69, 32,30; 2) K 040, 033, 039; and 3) t0 0.00, -0.16, 0.03 corresponding to males, females and all fish respectively. The rates of total mortality (Z) were 0.18, 0.16 and 0.17 for males, females and all fish, respectively. Because of the low rate of exploitation during the study, this values can be used as...
Tipo: Journal Contribution
Palavras-chave: Growth; Mortality; Length-weight relationships.
Ano: 1997
URL: http://hdl.handle.net/1834/5792

Distribución, evaluación acustica y estructura poblacional de la anchoíta. Resultados de las campañas del año 1993
Provedor de dados: 20
Autores: Hansen, J.E.; Madirolas, A.
Two pelagic surveys to study were carried out during 1993. Those surveys covered the regions inhabited by either the bonaerensis stock in october (34-41°S)and the patagonian stock in November - December (41-45°30'S). Pre-stratified random sampling designs, including two random steps to allocate the transects, were adopted to perform the acoustic sampling by echo integration. A midwater trawl net (9-16 m vertical opening, 10 mm mesh-sized codend)was used to collect fish samples. The biomass of the northern stock was acoustically estimated to be about 1,45 million tons, whereas that of the southern stock was almost 740,000 t. Young anchovies, up to two-year old, allow for most of theose abundance values within each stock. The arrays of individuals at the sea...
Tipo: Journal Contribution
Palavras-chave: Pelagic fisheries; Geographical distribution; Biomass; Mortality; Echo surveys; Stock assessment; Geographical distribution; Biomass; Stock assessment; Pelagic fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1996
URL: http://hdl.handle.net/1834/1955

Edad, crecimiento y mortalidad de Lutjanus purpureus Poey, 1867 (Pisces: Lutjanidae) de la region de Guyanas
Provedor de dados: 20
Autores: González, L.W.; Eslava, N.; Silva, C,.
Se determinó la edad y se estimaron los parámetros de crecimiento y mortalidad del pargo colorado, Lutjanus purpureus Poey, 1867 con base en la lectura de 152 urohiales de 1561 individuos capturados durante 1988 de la región de Guayanas, comprendida entre los 06º - 10º LN y 54º - 61º LW, mediante la pesca exploratoria del B/I "Dr. Fridtjof Nansen". El recuento de zonas anuales en urohiales permitió establecer siete grupos de edad. La curva teórica de crecimiento en longitud se ajustó de acuerdo con los valores de los parámetros de crecimiento de von Bertalanffy : L∞ = 91.99 cm; K = 0.245 por año; to = -0.499 año. La mortalidad natural obtenida a través de la ecuación de Taylor fue igual a 0.255 por año y la mortalidad total calculada mediante el método de...
Tipo: Journal Contribution
Palavras-chave: Age; Growth; Mortality; Fish; Growth; Fish; Age; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1998
URL: http://hdl.handle.net/1834/3269

Algunos resultados de las campañas primaverales de evaluación anual de anchoíta bonaerense efectuadas entre 1993 y 1996.
Provedor de dados: 20
Autores: Hansen, J.E.; Madirolas, A.
Information resulting from four spring acoustic surveys carried out between 1993 - 1996 to assess bonaerensis anchovy (Engraulis anchoita) biomass (34°- 41°30´S) is presented. Annual estimates, successively higher, went from 1.5 to 5.3 millon tons and the respective coefficient of  variability that followed the same trend ranged between 7.4.  and 28.0. . In general terms, the largest abundances were those recorded within the coastal strata off the Río de la Plata followed by those of the most southern stratum. Nevertheless, during the 1996 survey, the latter showed very high biomass values and, consequently, the largest mean. The region corresponding to the main commercial anchovy fishing ground during the season  represented, in any case, relatively low...
Tipo: Journal Contribution
Palavras-chave: Echo surveys; Biomass; Sexual maturity; Growth; Mortality; Biomass; Growth; Sexual maturity; Mortality; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_7016; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1999
URL: http://hdl.handle.net/1834/2531

Conocimiento biológico pesquero del recurso merluza (Merluccius hubbsi) y su pesquería en la República Argentina.
Provedor de dados: 20
Autores: Bezzi, S.I.; Dato, C.V.
This paper summarizes the present knowledge on Merluccius hubbsi and its fishery in Argentina, based on the model proposed by the Technical Secretary of Comisión Técnica Mixta del Frente Marítimo, in 1990. It includes the taxonomic location of the species, its geographical distribution, stock unity, structure and population dynamics. It describes the fishing gear and fishing operations and presents the available information on selectivity and discards. The paper shows the data landings separated by fleet. Exploitation regulatory measures in force are included.
Tipo: Journal Contribution
Palavras-chave: Gadoid fisheries; Population dynamics; Stock assessment; Mortality; Population structure; Fishery management; Landing statistics; Parasites; Stock assessment; Population structure; Fishery management; Mortality; Parasites; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_5574; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 1995
URL: http://hdl.handle.net/1834/2558

Aspectos de la biología de Portunus spinicarpus Stimpson 1871 (Decapoda: Portunidae) en el Golfo de Salamanca, Caribe colombiano
Provedor de dados: 20
Autores: García, C.B.; Mendoza, N.
Some vital statistics of the population of Portunus spinicarpus inhabiting the Golfo de Salamanca, Colombian Caribbean, are presented for the first time. Condition factor was found stable the year round, Von Bertalanffy growth parameters were estimated as L∞=38.6 mm, K= 2.5 year-1, to= -0.0573 year. Natural mortality was estimated as 4.62 year-1. P. spinicarpus seem to prefer deep waters and sand-muddy bottoms.
Tipo: Journal Contribution
Palavras-chave: Marine crustaceans; Population number; Mortality; Growth; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2006
URL: http://hdl.handle.net/1834/1984

Estudios sobre las variaciones espacio-temporales en los patrones de distribución de embriones y larvas de la anchoíta (Engraulis anchoita), en relación con la estimación de su intensidad reproductiva
Provedor de dados: 20
Autores: Sánchez, R.P.
Ichthyoplankton samples were collected during an exploratory cruise carried out by the RV Dr.Holmberg during the spring spawning peak of 1981 in the sea-shelf off Buenos Aires province (Argentina). The cruise was designed to carry out population studies in a restricted area of intense reproduction activity, in order to gather information on the time-space patterns of distribution of the eggs and larvae of the species.
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Mortality; Growth curves; Controlled conditions; Fish eggs; Fish larvae; Mortality; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1986
URL: http://hdl.handle.net/1834/2031

Estructura por edad y sexo de la población de merluza
Provedor de dados: 20
Autores: Renzi, M.A.; Santos, B.A.; Simonazzi, M.
Hake Merluccius hubbsi population structure in 1993, 1994, 1996, 1997 and 1998 and age and sex distribution during 1997 are analyzed. Data were obtained in research surveys. At the end of winter 1997 concentrations of juveniles were found in the San Jorge Gulf Argentine Sea, SW Atlantic, with maximum yields of 10,000 individuals per trawl hour for age 1 and 2,500 individuals per trawl hour for age 2. The highest concentrations of adults were found in the Gulf and South of 47°S, between the 100 and 200 m isobath, maximum yields of up to 1,700 individuals per trawl hour for age 3 and up to 90 individuals per trawl hour for age 7 and older. In spite of the decrease in population abundance, the basic age structure juveniles, young adults and old adults  was...
Tipo: Journal Contribution
Palavras-chave: Sex ratio; Age composition; Mortality; Fishery surveys; Gadoid fisheries; Age composition; Sex ratio; Mortality; Http://aims.fao.org/aos/agrovoc/c_29093; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2003
URL: http://hdl.handle.net/1834/2471

Determinación de la toxicidad en dispersantes de petróleo mediante bioensayos para calcular el CL50
Provedor de dados: 20
Autores: Villamar, F.; Tapia, M.E.
Este tipo de experimentación se ha centrado en la estimación de la Concentracion Letal Media (CL50), que significa el cincuenta por ciento de organismos muertos en un tiempo determinado.
Tipo: Journal Contribution
Palavras-chave: Toxicity; Bioassays; Detergents; Mortality; Dispersants; Phytoplankton; Toxicity; Bioassays; Detergents; Phytoplankton; Mortality; Dispersants; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_15731; Http://aims.fao.org/aos/agrovoc/c_10349; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_32426.
Ano: 2004
URL: http://hdl.handle.net/1834/2319

Características poblacionales de la anchoíta (Engraulis anchoita)del Mar Argentino. Parte I. El largo medio al primer año de vida, crecimiento y mortalidad
Provedor de dados: 20
Autores: Hansen, J.E.; Cousseau, M.B.; Gru, D.L.
A total of 7263 otoliths were collected from anchovy samples taken during two pelagic cruises which were carried out in the Spring of 1978. An statistical analysis of back calculated length distributions of one-year-old fish (L1)was made. The L1 mean values taken by geographical latitude form a cline, with higher values in the northern samples, and decreasing Southwards. Within this latitudinal gradient two main anchovy populations can be identified, one in the region of Buenos Aires Province and the other in Patagonian waters. The L1 of the females is significatively larger than that of the males for the former population, whereas in the Patagonian area differences between sexes are not significant. The parameters of the von Bertalanffy Growth curves, as...
Tipo: Journal Contribution
Palavras-chave: Stock identification; Otolith reading; Growth curves; Mortality; Mortality; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1984
URL: http://hdl.handle.net/1834/2043

Poda da parte aérea, visando melhor qualidade de mudas de Pinus taeda, em Caçador, SC
Provedor de dados: 190
Autores: Téo, Saulo Jorge; Marcon, Alan; da Costa, Reinaldo Hoinacki.
O objetivo desta pesquisa foi avaliar os efeitos da poda da parte aérea sobre a sobrevivência, altura (h), diâmetro de colo (dc) e relação h/dc, de mudas de Pinus taeda L., no Município de Caçador, SC, visando obter mudas de melhor qualidade. Foram testados seis diferentes tipos e intensidades de podas. Os dados foram submetidos ao teste de homogeneidade das variâncias (Teste de Bartlett), à análise de variâncias (ANOVA) e ao teste de comparação de médias de Tukey (α = 5%). Aos 60 dias após a instalação do experimento, não houve mortalidade de mudas. A retirada da porção apical das mudas resultou em formação de brotações laterais, diminuição significativa das alturas e da relação h/dc das mudas, melhorando o padrão de qualidade das mudas. Por outro lado, a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Recursos Florestais; Engenharia Florestal; Silvicultura; Mudas Florestais Intensidade de poda; Relação h/d; Mortalidade Pruning intensity; H/dn relation; Mortality.
Ano: 2014
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/468

Acaricidal activity of juazeiro leaf extract against red spider mite in cotton plants
Provedor de dados: 86
Autores: Ferraz,José Cláudio Barros; Matos,Cláudia Helena Cysneiros; Oliveira,Carlos Romero Ferreira de; Sá,Maria das Graças Rosa de; Conceição,Antônia Gilciléia Cunha da.
Abstract: The objective of this work was to evaluate the toxicity, repellency, efficiency, and phytotoxicity of the aqueous extract of juazeiro (Ziziphus joazeiro) leaves in the control of the red spider mite, Tetranychus ludeni, on cotton plant. For toxicity evaluation, T. ludeni adult females were put on cotton leaf discs sprayed with the juazeiro extract. The repellent effect was verified in arenas that contained cotton leaf discs treated or not with the aqueous extract. The control efficiency of the juazeiro extract was evaluated by the infestation of cotton plants by adult female mites, followed by spraying with the extract. Measured LC50 was 3.54% (m/v), with 76.47% mortality and repellent effect. There was control efficiency for 120 hours, with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium hirsutum; Tetranychus ludeni; Ziziphus joazeiro; Mortality; Plant extract; Toxicity.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000700493

Population dynamics of Millettia stuhlmannii Taub. in Ha-Makhuvha, Vhembe district of Limpopo Province, South Africa
Provedor de dados: 85
Autores: Tshisikhawe,MP; Siaga,NM; Bhat,RB.
The population dynamics of Millettia stuhlmannii Taub. was investigated to determine its current structure in Ha-Makhuvha. Plant populations are being utilized only for medicinal purposes under the close supervision of a local headman. It is used in treating stomach aches, as well as protecting homesteads and properties. Given the dependence of many rural communities on plants for medicine, timber, and various other non-timber resources, plant populations experience human pressures. These pressures demand great effort for in situ conservation and associated management needs of medicinal plants. Efforts also apply to sustainable usage and ex situ cultivation practices. The size-class distribution coupled with crown health and bark removal were used to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Millettia stuhlmannii; Size-class distribution; Crown health; Stem circumference; Basal area; Mortality.
Ano: 2011
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572011000200002

MORBIDITY/MORTALITY AND HEALTH MANAGEMENT OF SWINE IN THE UNITED STATES
Provedor de dados: 31
Autores: Bush,   Eric J.
A national survey on swine health was conducted by the National Animal Health Monitoring System ( NAHMS ) from December 1989 through January 1991. The survey sample was designed in collaboration with the National Agricultural Statistics Service (NASS ) in order to provide inferences about the nation's hog population, 95 percent of which was represented. The program consisted of two parts: the first was a general farm management and policy questionnaire  that was completed by 1,661 producers. The second part of the program was a monitoring phase that took place over a three-month period for each of 712 participating producers. Per litter estimates for the national population showed an average of 9.9 piglets born alive and 8.4 weaned. Estimates attributed 57...
Tipo: Report
Palavras-chave: NAHMS; Swine; Monitoring; Epidemiology; Production; Morbidity; Mortality; Births; Litter size; Prevention; Disease; Docking; Teeth clipping; Vaccination; Injection; Antibiotics; Water quality; Livestock Production/Industries.
Ano: 1992
URL: http://purl.umn.edu/32761

DAIRY HEIFER MORBIDITY, MORTALITY, AND HEALTH MANAGEMENT FOCUSING ON PREWEANED HEIFERS
Provedor de dados: 31
Autores: Ott,   Stephen L.
The National Dairy Heifer Evaluation Project ( NDHEP ) was conducted by the National Animal Health Monitoring System (NAHMS ) from April 1991 through July 1992. A total of 921 producers monitored calves on a daily basis from the first through the eighth week of life; results were extrapolated to the U.S. dairy population. Mortality of heifer calves was examined according to region ( west, midwest, northeast, southeast ). Mortality was highest in the western region ( 9.1 percent ) and lowest in the midwestern region ( 5.6 percent ). Calf deaths were highest in the two quarters October-December and January-March ( 8.4 percent each quarter ) and lowest in the quarter April-June ( 5.2 percent ). The overall average of stillborn calves was 1.6 percent. Calving...
Tipo: Report
Palavras-chave: NAHMS; Dairy; Cattle; Monitoring; Epidemiology; Preweaning; Heifer; Production; Diseases; Morbidity; Mortality; Death; Illness; Respiratory; Reproduction; Digestive; Musculoskeletal; Nervous system; Mastitis; Maternity; Injections; Antibiotics; Milk replacer; Livestock Production/Industries.
Ano: 1993
URL: http://purl.umn.edu/32756

DAIRY '96, PART I: REFERENCE OF 1996 DAIRY MANAGEMENT PRACTICES
Provedor de dados: 31
Autores: Ott,   Stephen L.
The NAHMS Dairy '96 Study was designed to provide both participants and the industry with information on the nation's dairy animal population for education and research.  The USDA's National Agricultural Statistics Service (NASS) collaborated with NAHMS to select a statistically valid sample yielding 2,542 producers.  Included in the study were 20 states that represented 83.1 percent of the U.S. milk cows as of January 1, 1996.  NASS interviewers collected data for Part I via a questionnaire administered on-farm from January 1 through 26, 1996.   Contact for this paper: Steven Ott
Tipo: Report
Palavras-chave: NAHMS; Dairy; Cattle; Milk; Feed; Weaning; Culls; Health; Vaccination; Morbidity; Mortality; Births; Housing; Biosecurity; Livestock Production/Industries.
Ano: 1996
URL: http://purl.umn.edu/32758

CHAPA, BEEF COW/CALF HEALTH AND PRODUCTIVITY AUDIT, PART IV: BEEF COW/CALF BREEDING MANAGEMENT
Provedor de dados: 31
Autores: Dargatz,   David.
As part of the National Animal Health Monitoring System (NAHMS ), USDA:APHIS:Veterinary Services conducted a national study of beef production, the Beef Cow/Calf Health and Productivity Audit (CHAPA). This study was designed to provide both participants and the industry with information on cow/calf health, productivity, and management practices. The National Agricultural Statistics Service (NASS) collaborated with USDA:APHIS:VS to select a producer sample that was statistically designed to provide inferences about the nation's cow/calf population. Data for Part IV: Beef Cow/Calf Breeding Management were collected by federal and state veterinary officers (VMO's) in 18 of the largest cow/calf producing states between July 1 and July 30, 1993. These 18 states...
Tipo: Report
Palavras-chave: NAHMS; Epidemiology; Beef cattle; Calves; Breeding; Mortality; Grazing; Trichomonas fetus; Vaccination; Deworming; Palpation; Livestock Production/Industries.
Ano: 1994
URL: http://purl.umn.edu/32753

Robust Estimates of Value of a Statistical Life for Developing Economies: An Application to Pollution and Mortality in Santiago
Provedor de dados: 31
Autores: Bowland,   Brad J.; Beghin,   John C.
The value-of-statistical-life (VSL) approach is used by environmental economists to value mortality changes resulting from environmental improvement, such as decreased urban air pollution. Because of scarce data, VSL estimates are not available for developing countries. Using robust regression techniques, we conduct a meta-analysis of VSL studies in industrialized countries to derive a VSL prediction function for developing economies accounting for differences in risk, income, human capital levels, and other demographic characteristics of these economies. We apply our estimated VSL to assess the willingness-to-pay for reduction in mortality linked to air pollution in Santiago, Chile. We find willingness-to-pay estimates in the range of $519,000 to $675,000...
Tipo: Working or Discussion Paper
Palavras-chave: Air pollution; Meta-analysis; Mortality; Santiago; VSL; Willingness-to-pay; Environmental Economics and Policy; I12; Q25; O15.
Ano: 1998
URL: http://purl.umn.edu/18471

A Cross-Country Analysis of Household Responses to Adult Mortality in Rural Sub-Saharan Africa: Implications For HIV/AIDS Mitigation And Rural Development Policies.
Provedor de dados: 31
Autores: Mather,   David; Donovan,   Cynthia; Jayne,   Thomas S.; Weber,   Michael T.; Chapoto,   Antony; Mazhangara,   Edward; Bailey,   Linda; Yoo,   Kyeongwon; Yamano,   Takashi; Mghenyi,   Elliot W.
This paper summarizes and synthesizes across the results of a set of country studies on the effects of prime-age adult mortality on rural households in Kenya, Malawi, Mozambique, Rwanda, and Zambia. Each study is based on large representative rural household surveys. These findings have implications for the design of efforts to mitigate some of the most important effects of rural adult mortality, and for key development policies and priorities.
Tipo: Report
Palavras-chave: HIV/AIDS; Sub-Saharan Africa; Mortality; Community/Rural/Urban Development; Health Economics and Policy; Downloads July 2008 - July 2009: 21; I11.
Ano: 2004
URL: http://purl.umn.edu/54571

REFERENCE OF 1996 U.S. REGIONAL SHEEP HEALTH AND MANAGEMENT PRACTICES
Provedor de dados: 31
Autores: Wineland,   Nora.
In 1995, the National Animal Health Monitoring System (NAHMS) collaborated with the Research and Education Division of the American Sheep Industry Association (ASI) in developing a needs assessment tool to identify the most important health and productivity factors for the sheep industry. In collaboration with the USDA's National Agricultural Statistics Service (NASS), a statistically designed producer sample was selected to provide estimates for the United States sheep population in the 48 contiguous states.   The NAHMS/ASI questionnaires were mailed to 19,807 sheep operations in January 1996; data were received and summarized from 5,174 respondents. It was estimated that in the 48 contiguous states, there were approximately 8,433,400 sheep as of January...
Tipo: Report
Palavras-chave: NAHMS; Sheep; Health; Disease; Death; Morbidity; Mortality; Economics; Predators; Vaccinations; Antibiotics; Income; Worms; Reproduction; Profitability; Regions; Livestock Production/Industries.
Ano: 1996
URL: http://purl.umn.edu/32751

Institutions and Demographic Responses to Shocks: Wuttemberg, 1634-1870
Provedor de dados: 31
Autores: Guinnane,   Timothy W.; Ogilvie,   Sheilagh.
Simple Malthusian models remain an important tool for understanding pre-modern demographic systems and their connection to the economy. But most recent literature has lost sight of the institutional context for demographic behavior that lay at the heart of Malthus’s own analysis. This paper estimates a short-run version of a Malthusian model for two Württemberg communities from 1646 to 1870. Württemberg differed institutionally from the northwest European societies analyzed in previous studies. The impact of institutional differences shows clearly in differing demographic reactions to economic shocks. Mortality was less sensitive to shocks than one would expect, while nuptiality was especially sensitive.
Tipo: Working or Discussion Paper
Palavras-chave: Malthusian models; Mortality; Fertility; Nuptiality; Guilds; Institutional and Behavioral Economics; Labor and Human Capital; Research Methods/ Statistical Methods; N33; J10.
Ano: 2008
URL: http://purl.umn.edu/5977

Understanding Rwandan Agricultural Households’ Strategies to Deal with Prime Age Illness and Death: A Propensity Score Matching Approach
Provedor de dados: 31
Autores: Donovan,   Cynthia; Bailey,   Linda.
Paper prepared for the IFPRI/Renewal Conference on HIV/AIDS and Food and Nutrition Security, held in Durban South Africa, 13-17 April, 2005.
Tipo: Conference Paper or Presentation
Palavras-chave: Food security; Food policy; Rwanda; Mortality; Morbidity; Health Economics and Policy; Q18.
Ano: 2005
URL: http://purl.umn.edu/55122

An analysis of the determinants of flood damages
Provedor de dados: 31
Autores: Ferreira,   Susana.
In this paper we analyze mortality caused by 2,194 large flood events between 1985 and 2008 in 108 countries. Unlike previous studies that looked at natural-disaster mortality, we find that year-to-year changes in income and institutional determinants of vulnerability do not affect flood mortality directly. Income and institutions influence mortality only indirectly, through their impact on the intensity and frequency of floods. Population exposure affects the number of deaths both directly and indirectly. Higher population exposure results in more deaths once the flood has occurred, but it is associated with smaller floods. In developing countries it also reduces the count of floods.
Tipo: Conference Paper or Presentation
Palavras-chave: Natural Disasters; Floods; Mortality; Adaptation; Climate Change; Environmental Economics and Policy; International Development; Land Economics/Use; Risk and Uncertainty; Q54.
Ano: 2010
URL: http://purl.umn.edu/98381

BEEF, '97, PART IV: CHANGES IN THE U.S. BEEF COW-CALF INDUSTRY, 1993-1997
Provedor de dados: 31
Autores: Dargatz,   David.
Section 1 of this report shows demographic changes of the U.S. beef cow-calf industry from a historical perspective from data provided by the National Agricultural Statistics Service (NASS) and Census of Agriculture.  Results of two NAHMS national studies in Section II complete the overview of change in the U.S. beef cow-calf industry during the 5-year period from 1993 to 1997.  NAHMS, CHAPA Phase I included data collected from 2,539 cow-calf operations in the 48 continental states via telephone during the fall of 1992.  Subsequent data collection was done on operations in 18 states and from producers with five or more beef cows and 50 percent or more of their calf crop born between January 1 and June 30 (spring calving)  The 18 states represented 70...
Tipo: Report
Palavras-chave: NAHMS; Beef; Cattle; Cow-calf; Demographics; Identification; Economics; Marketing; Weaning; Morbidity; Mortality; Nutrition; Livestock Production/Industries.
Ano: 1998
URL: http://purl.umn.edu/32755

SWINE '95 PART III: CHANGES IN THE U.S. PORK INDUSTRY, 1990-1995
Provedor de dados: 31
Autores: Bush,   Eric J.
This report is the third of a three-part release of national information from the second National Animal Health Monitoring System (NAHMS) swine study. For the Swine '95 study, the USDA's National Agricultural Statistics Service (NASS) collaborated with Veterinary Services (VS) to select a producer sample that was statistically designed to provide inferences to the nation's swine population. Data collected for the study represented the top 16 pork states and nearly 91 percent of the U.S. hog inventory, as well as nearly three fourths of the nation's pork producers. In the 6 years from 1990 through 1995, hog and pig inventory estimates increased approximately 7 percent. The number of U.S. swine operations decreased more than 30 percent. The proportion of...
Tipo: Report
Palavras-chave: NAHMS; Swine; Monitoring; Epidemiology; Production; Mortality; Disease; Mortality; Demographic changes; Breeding; Waste management; Deworm; Antibiotics; Mange; Lice; Marketing; Culling; Livestock Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/32771

BEEF '97, PART II: REFERENCE OF 1997 BEEF COW-CALF HEALTH AND HEALTH MANAGEMENT PRACTICES
Provedor de dados: 31
Autores: Dargatz,   David.
The NAHMS Beef '97 Study was designed to provide both participants and the industry with information on the nation's cow-calf population for education and research.  The USDA's National Agricultural Statistics Service (NASS) collaborated with NAHMS to select a statistically-valid sample yielding 2,713 producers from 23 states.  The 23-state target population represented 85.7 percent of U.S. beef cows on January 1, 1997, and 77.6 percent of U.S. beef operations.  NASS enumerators collected data for this report via a questionnaire administered on-farm from December 30, 1996, through February 3, 1997. Contact For This Paper: David Dargatz
Tipo: Report
Palavras-chave: NAHMS; Beef; Cattle; Cow-calf; Health; Morbidity; Mortality; Injections; Nutrition; Implants; Livestock Production/Industries.
Ano: 1997
URL: http://purl.umn.edu/32760

DAIRY '96, PART II: CHANGES IN THE U.S. DAIRY INDUSTRY: 1991-1996
Provedor de dados: 31
Autores: Ott,   Stephen L.
The NAHMS Dairy '96 Study was designed to provide both participants and the industry with information on the nation's dairy animal population for education and research.  This report contains demographic changes of the U.S. and world dairy industry from a historical perspective from data provided by the National Agricultural Statistics Service (NASS), Census of Agriculture, and Foreign Agriculture Service.  Results of two NAHMS national studies overview changes in the U.S. dairy industry in the 5-year period of 1991 to 1996.  The 1991 National Dairy Heifer Evaluation Project included herds of 30 or more milk cows and heifer-rearing operations in 28 states representing 83 percent of U.S. milk cows.  NAHMS Dairy '96 described dairy production for operations...
Tipo: Report
Palavras-chave: NAHMS; Dairy; Cattle; Demographics; Breed; Rolling herd average; Milk; Feed; Weaning; Vaccination; Morbidity; Mortality; Housing; Biosecurity; Livestock Production/Industries.
Ano: 1996
URL: http://purl.umn.edu/32741

Health Status and Health Care Access of Farm and Rural Populations
Provedor de dados: 31
Autores: Jones,   Carol Adaire; Parker,   Timothy S.; Ahearn,   Mary Clare; Mishra,   Ashok K.; Variyam,   Jayachandran N.
Rural residents have higher rates of age-adjusted mortality, disability, and chronic disease than their urban counterparts, though mortality and disability rates vary more by region than by metro status. Contributing negatively to the health status of rural residents are their lower socioeconomic status, higher incidence of both smoking and obesity, and lower levels of physical activity. Contributing negatively to the health status of farmers are the high risks from workplace hazards, which also affect other members of farm families who live on the premises and often share in the work; contributing positively are farmers’ higher socioeconomic status, lower incidence of smoking, and more active lifestyle. Both farm and rural populations experience lower...
Tipo: Report
Palavras-chave: Health Economics and Policy; Agriculture safety and health; Electronic health records; Farmer health; Health; Health care access; Health care affordability; Health care quality; Health disparities; Health IT; Health status; Mortality; Rural health; Telehealth; Uninsured.
Ano: 2009
URL: http://purl.umn.edu/54430

DAIRY HERD MANAGEMENT PRACTICES FOCUSING ON PREWEANED HEIFERS
Provedor de dados: 31
Autores: Ott,   Stephen L.
The National Dairy Heifer Evaluation Project ( NDHEP ) was conducted by the National Animal Health Monitoring System (NAHMS ) from April 1991 through July 1992 with the assistance of 1,811 producers from 28 states. Producers included in the study each had herds of 30 or more milk cows, representing 78 percent of the milk cows in the U.S. The average total of cattle and calves on each operation was 169.4. The main breed on 94.9% of operations was Holstein. Slightly over 46 percent of operations stated reproductive problems as the cause of low milk production of cows culled from the herd. Newborn calves were separated from their mothers before nursing on 28.0 percent of operations and less than 12 hours after birth on 39.6 percent of operations. On 64.0...
Tipo: Report
Palavras-chave: NAHMS; Dairy; Cattle; Monitoring; Epidemiology; Preweaning; Heifer; Production; Morbidity; Mortality; Death loss; Illness; Colostrum; Calving; Dehorning; Vaccination; Scours; Antibiotics; Feed; Milk replacer; Livestock Production/Industries.
Ano: 1994
URL: http://purl.umn.edu/32754

REFERENCE OF 1996 U.S. SHEEP HEALTH AND MANAGEMENT PRACTICES
Provedor de dados: 31
Autores: Wineland,   Nora.
In 1995, the National Animal Health Monitoring System (NAHMS) collaborated with the Research and Education Division of the American Sheep Industry Association (ASI) in developing a needs assessment tool to identify the most important health and productivity factors for the sheep industry. In collaboration with the USDA's National Agricultural Statistics Service (NASS), a statistically designed producer sample was selected to provide estimates for the United States sheep population in the 48 contiguous states. The NAHMS/ASI questionnaires were mailed to 19,807 sheep operations in January 1996; data were received and summarized from 5,174 respondents. It was estimated that in the 48 contiguous states, there were 82,040 operations with sheep as of 1995;...
Tipo: Report
Palavras-chave: NAHMS; Sheep; Health; Disease; Death; Morbidity; Mortality; Economics; Predators; Vaccinations; Antibiotics; Income; Worms; Reproduction; Profitability; Livestock Production/Industries.
Ano: 1996
URL: http://purl.umn.edu/32743

CHAPA, BEEF COW/CALF HEALTH AND PRODUCTIVITY AUDIT, PART I: BEEF COW/CALF HERD MANAGEMENT PRACTICES IN THE UNITED STATES
Provedor de dados: 31
Autores: Dargatz,   David.
As part of the National Animal Health Monitoring System (NAHMS ), USDA:APHIS:Veterinary Services conducted a national study of beef production, the Beef Cow/Calf Health and Productivity Audit (CHAPA). This study was designed to provide both participants and the industry with information on cow/calf health, productivity, and management practices. Data for Part 1: Beef Cow/Calf Herd Management Practices in the United States, were collected from beef producers September 29 through October 9, 1992. The National Agricultural Statistics Service (NASS) collaborated with VS to select a statistically designed producer sample that represented all U.S. cow/calf operations in the 48 continental United States. Eighty-one percent of operations had commercial cattle...
Tipo: Report
Palavras-chave: NAHMS; Epidemiology; Beef cattle; Calves breeding; Artificial insemination; Mortality; Branding; Injections; Castration; Weaning; Livestock Production/Industries.
Ano: 1993
URL: http://purl.umn.edu/32740

CHAPA, BEEF COW/CALF HEALTH AND PRODUCTIVITY AUDIT, PART V: QUALITY ASSURANCE PROFILE
Provedor de dados: 31
Autores: Dargatz,   David.
As part of the National Animal Health Monitoring System (NAHMS ), USDA:APHIS:Veterinary Services conducted a national study of beef production, the Beef Cow/Calf Health and Productivity Audit (CHAPA). This study was designed to provide both participants and the industry with information on cow/calf health, productivity, and management practices. The National Agricultural Statistics Service (NASS) collaborated with USDA:APHIS:VS to select a producer sample that was statistically designed to provide inferences about the nation's cow/calf population. Data for Part V: Quality Assurance Profile were collected by federal and state veterinary officers (VMO's) in 18 of the largest cow/calf producing states between January 1 and January 31, 1994. The average...
Tipo: Report
Palavras-chave: NAHMS; Epidemiology; Beef cattle; Calves; Weaning; Value; Economics; Disease; Scours; Calf crop; Mortality; Calving problems; Parasites; Livestock Production/Industries.
Ano: 1994
URL: http://purl.umn.edu/32767

What is the Value of Hazardous Weather Forecasts? Evidence from a Survey of Backcountry Skiers
Provedor de dados: 31
Autores: Alberini,   Anna; Rheinberger,   Christoph M.; Leiter,   Andrea M.; McCormick,   Charles A.; Mizrahi,   Andrew.
What is the value of hazardous weather warnings? To answer this question, we focus on the avalanche bulletin for Switzerland issued by the WSL Institute for Snow and Avalanche Research (SLF). We take a survey-based, non-market valuation approach to estimating the value of hypothetical improvements in avalanche forecasting. We focus on backcountry skiers because (i) safety is arguably the most important type of benefit associated with the avalanche bulletin, (ii) they voluntarily undertake risks, and (iii) they perceive themselves and are generally perceived by others as skilled in avoiding risks. The respondents’ willingness to pay (WTP) for the improved services ranges between CHF 42 to 46, implying a mean value of statistical life (VSL) of CHF 1.75...
Tipo: Working or Discussion Paper
Palavras-chave: Avalanche Risk; Mortality; Value of Hazardous Weather Forecasts; Contingent Valuation; Value of a Statistical Life; Research Methods/ Statistical Methods; D81; J17; Q26.
Ano: 2010
URL: http://purl.umn.edu/92712

Does the Value of a Statistical Life Vary with Age and Health Status? Evidence from the United States and Canada
Provedor de dados: 31
Autores: Alberini,   Anna; Cropper,   Maureen L.; Krupnick,   Alan J.; Simon,   Nathalie B.
Much of the justification for environmental rulemaking rests on estimates of the benefits to society of reduced mortality rates. Yet the literature providing estimates of the willingness to pay (WTP) for mortality risk reductions measures the value that healthy, prime-aged adults place on reducing their risk of dying, whereas the majority of statistical lives saved by environmental programs, according to epidemiological studies, appear to be the lives of older people and people with chronically impaired health. This paper provides an empirical assessment of the effects of age and baseline health on WTP for mortality risk reductions by reporting the results of two contingent valuation surveys designed to test the above hypotheses. One survey was...
Tipo: Working or Discussion Paper
Palavras-chave: Willingness to pay; Mortality; Contingent valuation; Age; Health status; Health Economics and Policy; D61; D62; Q20; Q26.
Ano: 2002
URL: http://purl.umn.edu/10769

Chapter 17: DETERMINING FOODBORNE ILLNESS IN THE UNITED STATES: A STEP TOWARD VALUATION
Provedor de dados: 31
Autores: Steahr,   Thomas E.
This book was originally published by Westview Press, Boulder CO, 1995.
Tipo: Book Chapter
Palavras-chave: Foodborne illness; Demographics; Morbidity; Mortality; Food Consumption/Nutrition/Food Safety.
Ano: 1995
URL: http://purl.umn.edu/25978

SWINE '95 PART I: REFERENCE OF 1995 SWINE MANAGEMENT PRACTICES
Provedor de dados: 31
Autores: Bush,   Eric J.
This report is the first of a three-part release of national information from the second National Animal Health Monitoring System (NAHMS) swine study, the Swine '95 Grower/Finisher.  The first national study, 1990 National Swine Survey, focused on farrowing sows and preweaning piglets. For the Swine '95 Study, the USDA's National Agricultural Statistics Service (NASS) collaborated with Veterinary Services (VS) to select a producer sample that was statistically designed to provide inferences to the nation's swine population. Data for this report were collected from 1,477 producers in sixteen major pork production states, accounting for nearly 91 percent of the U.S. hog inventory and nearly three fourths of U.S. pork producers. By percent of pigs contained,...
Tipo: Report
Palavras-chave: NAHMS; Swine; Monitoring; Epidemiology; Production; Nursery; Grower/finisher; Mortality; Weaning; Disease; Breeding; Facilities; Waste management; Manure; Vaccination; Biosecurity; Environment; Carcass disposal; Livestock Production/Industries.
Ano: 1995
URL: http://purl.umn.edu/32739

Mortality, Mobility, and Schooling Outcomes Among  Orphans: Evidence from Malawi
Provedor de dados: 31
Autores: Ueyama,   Mika.
A tremendous increase in the number of orphans associated with a sharp rise in prime-age adult mortality due to AIDS has become a serious problem in Sub-Saharan Africa. In fact, more than 30 percent of school-aged children have lost at least one parent in Malawi. Lack of investments in human capital and adverse conditions during childhood are often associated with lower living standards in the future. Therefore, if orphans face an increased risk of poverty, exploitation, malnutrition, and poorer access to health care and schooling, early intervention is critical so as to avoid the potential poverty trap. The purpose of this study is to investigate the impacts of orphanhood/parental death on children’s mortality risks, migration behaviors, and schooling...
Tipo: Working or Discussion Paper
Palavras-chave: Orphan; Mortality; Mobility; School enrollment; Grade progression; HIV/AIDS; Sample attrition; Malawi; Labor and Human Capital.
Ano: 2007
URL: http://purl.umn.edu/42403

Structure and dynamics of a woody plant community of a tropical semi-deciduous seasonal forest in the "Estação Ecológica do Panga", municipality of Uberlândia, Minas Gerais, Brazil
Provedor de dados: 88
Autores: Paiva,Luciana Vieira de; Araújo,Glein Monteiro de; Pedron,Fernando.
Studies of plant community dynamics are essential in understanding the demographic patterns of species since changes in demographic rates can affect the floristic composition and future structure. The purpose of the present study was to analyze the changes in the community structure and floristic composition of woody plants in a tropical semi-deciduous forest in Uberlândia in central Brazil, during a 10-years period. The data were collected in 1989 and in 2000 in 50 quadrats (10 m x 10 m) where all trees with a minimum circumference at breast height of 10 cm were sampled. In 1989, 93 species and 1103 individuals were registered. Over a period of 10 years, seven new species were added to the community, although eight disappeared. The main change that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Growth; Mortality; Recruitment; Tropical forest.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000300003

Effect of temperature on incubation period, embryonic mortality, hatch rate, egg water loss and partridge chick weight (Rhynchotus rufescens)
Provedor de dados: 89
Autores: Nakage,ES; Cardozo,JP; Pereira,GT; ,SA; Boleli,IC.
The aim of this study was to determine the effects of incubation temperature (34.5; 35.5; 36.5; 37.5 and 38.5ºC), on incubation period, embryonic mortality, hatching rate, water loss and chick weight at hatch, using daily incubation of partridge (Rhynchotus rufescens) eggs. The highest hatching percentage was obtained between 35.5 and 36.5ºC. Incubation length and temperature were inversely proportional. Water loss was lower in eggs incubated at low temperatures as compared to high temperatures. There was no difference among incubation temperatures in absolute and relative hatchling weights. Early embryonic mortality increased at low temperatures (&lt;35.5ºC), whereas intermediate and late embryonic mortality increased at high temperatures (&gt;36.5ºC)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Incubation; Hatchability; Mortality; Temperature; Water loss.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2003000200007

Climate Change in Layer Poultry Farming: Impact of Heat Waves in Region of Bastos, Brazil
Provedor de dados: 89
Autores: Lamarca,DSF; Pereira,DF; Magalhães,MM; Salgado,DD.
ABSTRACT The region around the municipality of Bastos, state of São Paulo, accounted for about 7% of Brazilian egg production in 2015. In 2012, it experienced a heat wave that resulted in the death of approximately 500,000 hens, according to information released at the time. Considering the impact of heat waves on layer mortality, the objective of this study was to analyze how heat waves impact the layer farming in the region of Bastos, considering the climate change scenarios forecasted by the IPCC for the next years. This study was conducted in three stages: i) analysis of the IPCC reports to understand climate change scenarios; ii) analysis of historical temperature data in the region of Bastos; iii) analysis of how climate change, through heat waves,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Egg production; Extreme event; IPCC; Laying hens; Mortality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000400657

Salmonella Gallinarum virulence in experimentally-infected Japanese quails (Coturnix japonica)
Provedor de dados: 89
Autores: Rocha-e-Silva,RC; Cardoso,WM; Teixeira,RSC; Albuquerque,ÁH; Horn,RV; Cavalcanti,CM; Lopes,ES; Gomes Filho,VJR.
Salmonella Gallinarum is the agent of fowl typhoid in poultry and infects mainly adult galliforms, causing significant economic losses in poultry production. Because quails are susceptible to this disease and quail production is becoming increasingly important in Brazil, this study was carried out to evaluate the virulence of Salmonella Gallinarum strain to quails. The inoculum was prepared from S. Gallinarum strain resistant to nalidixic acid. Forty eight 16-week-old Japanese quails were randomly distributed in three groups. Before the experiment, cloacal swabs were collected from all birds in order to confirm they were free from Salmonella spp. Cloacal swabs and fecal samples were collected on days 03, 06, 09, 12, and 15 post-inoculation. Birds that died...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Experimental inoculation; Mortality; Re-isolation; Salmonella Gallinarum.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2013000100007

Estimating mortality in laying hens as the environmental temperature increases
Provedor de dados: 89
Autores: Pereira,DF; do Vale,MM; Zevolli,BR; Salgado,DD.
Layer mortality due to heat stress is an important economic loss for the producer. The aim of this study was to determine the mortality pattern of layers reared in the region of Bastos, SP, Brazil, according to external environment and bird age. Data mining technique were used based on monthly mortality records of hens in production, 135 poultry houses, from January 2004 to August 2008. The external environment was characterized according maximum and minimum temperatures, obtained monthly at the meteorological station CATI in the city of Tupã, SP, Brazil. Mortality was classified as normal (£ 1.2%) or high (&gt; 1.2%), considering the mortality limits mentioned in literature. Data mining technique produced a decision tree with nine levels and 23 leaves,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Data mining; Layer production; Mortality; Thermal comfort.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400008

Broiler-Housing Conditions Affect the Performance
Provedor de dados: 89
Autores: Mesa,D; Muniz,E; Souza,A; Geffroy,B.
ABSTRACT In the last decades animal production has considerably increased worldwide to sustain an ever-growing human population. Among animal reared for consumption purposes, chickens are undoubtedly one of the most successful, mainly due to their rapid growth rate. The development of broiler farming has been accompanied in recent years by a substantial attention to animal welfare. This study is aimed at assessing the effects of different housing conditions on both feed conversion ratio and mortality of male broiler flocks through a large-scale study (more than 100 million birds) involving 977 farms belonging to one major producer. For this, we evaluated nine features of the housing system using a linear model with random effect. The features were:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chickens; Sheds; Feed conversion ratio; Mortality; Welfare.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2017000200263

Immunomodulatory and growth-promoting effect of a probiotic supplemented in the feed of broiler chicks vaccinated against infectious bursal disease
Provedor de dados: 89
Autores: Naseem,S; Rahman,SU; Shafee,M; Sheikh,AA; Khan,A.
This study was designed to investigate the effects of a probiotic plus an immunomodulatory product on the growth performance, immune response and net economic returns of broiler chicks vaccinated against Infectious bursal diseases virus (IBDV). A flock of 350 day-old chicks were equally and randomly distributed in seven groups, each comprising 50 birds. A mixture of microorganisms (¹Probiotic) or Cyclophosphamide (immune suppressor) was offered through feed supplementation to different groups. The Probiotic, consisting of Lactobacillus species, Bifidobacterium, Streptococcus salivarius and Enterococcus faecium, in addition to Aspergillus oryza and Candida pintolopessii. Compared with control treatment group, the probiotic-supplemented chicks had better...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Probiotic; Cyclophosphamide; Mortality; Morbidity; IBDV.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000200004

PRODUCTIVE PERFORMANCE OF WHITE LEGHORN HENS BASED ON THE TYPE OF HOUSING DURING REARING: FLOOR VERSUS CAGE
Provedor de dados: 89
Autores: Itza-Ortiz,MF; Peraza-Mercado,G; Castillo-Castillo,Y; Rodriguez-Alarcon,CA; Vital-Garcia,C; Jaramillo-Lopez,E; Carrera-Chavez,JM.
ABSTRACT Poultry farmers in the southeastern of Mexico consider that the productivity of the hens that comes from rearing on floor has a higher productive performance than reared hens in cages, mainly due to higher percentage of egg laying and lower mortality. The aim of this study was to evaluate the productive performance of the laying hen in relation to the type of rearing. A total of 79680 pullets Bovans White of 17 weeks of age were housed in cages with five pullets cage-1 (405 cm2pullet-1). They were divided in two treatments according to their type of rearing (floor vs cage) with four replicates. The study period was from week 20 to week 40 of age. The variables evaluated were daily (%) and cumulative mortality (%), egg production (%), egg weight...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Feed intake; Productive performance; Mortality; Egg production; Rearing method.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2016000300543

Effect of Hatching Time on Yolk Sac Percentage and Broiler Live Performance
Provedor de dados: 89
Autores: Özlü,S; Shiranjang,R; Elibol,O; Brake,J.
ABSTRACT This study investigated the effects of broiler chick hatching time on the percentage of the yolk sac and subsequent broiler live performance. Broiler hatching eggs were obtained from a commercial flock at 55 wk of age and were stored for 2 d at 18°C and 75% relative humidity (RH) prior to incubation. Chicks were identified as hatching Early (471-477 h), Middle (480-486 h), and Late (494-510 h). All chicks were removed from the trays at 510 h of incubation. Body weight (BW) and yolk weight (YW) were determined at emergence from the shell (initial hatch time) and at placement on feed. Chicks were permanently identified by hatch time with neck tags, feather sexed, weighed, and introduced to feed and water in litter floor pens. Broiler BW and feed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body weight; Feed consumption; Hatching time; Mortality; Yolk.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000200231

Characterization of heat waves affecting mortality rates of broilers between 29 days and market age
Provedor de dados: 89
Autores: Vale,MM; Moura,DJ; Nääs,IA; Pereira,DF.
Climate may affect broiler production, especially where there are heat waves, which may cause high mortality rates due to the heat stress. Heat wave prediction and characterization may allow early mitigation actions to be taken. Data Mining is one of the tools used for such a characterization, particularly when a large number of variables is involved. The objective of this study was to classify heat waves that promote broiler chicken mortality in poultry houses equipped with minimal environmental control. A single day of heat, a heat-shock day, is capable of producing high broiler mortality. In poultry houses equipped with fans and evaporative cooling, the characterization of heat waves affecting broiler mortality between 29 days of age and market age...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Heat shock day; Heat wave; Mortality; Productivity losses.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2010000400010

Effect of temperature and substrate moisture on group survival of Constrictotermes sp. (Isoptera: Termitidae) under laboratory conditions
Provedor de dados: 92
Autores: Ferreira,Dinamarta V.; Cruz,Joseane S.; Sacramento,Jailton J.M.; Rocha,Marcos Leandro C.; Cristaldo,Paulo F.; Araújo,Ana Paula A.
ABSTRACT Laboratory bioassays should be performed under appropriate conditions that minimize stress and promote greater longevity to tested animals. For social insects, for instance, the stress triggered by removal individuals from nests may result in changes in their survival and behavior. Here we analyzed the effects of variations of different combinations of temperature and substrate moisture (mL of water/g of nest substrate) on group survival of Constrictotermes sp. (Termitidae: Nasutitermitinae). In general, lower substrate moisture resulted in faster mortality. On the other hand, groups survival longer at a temperature of 26 ºC and under higher substrate moisture (2–3 mL/7 g of nest substrate). The result of this study may contribute to the...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Bioassays; Mortality; Termite.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000100009

Effects of cycloheximide on the mortality of Atta sexdens leaf-cutting worker ants
Provedor de dados: 92
Autores: Sousa,Kátia Kaelly Andrade; Camargo,Roberto da Silva; Forti,Luiz Carlos; Caldato,Nadia.
ABSTRACT Leaf-cutting ants live symbiotically with a fungus that they cultivate on the plant leaves that they cut. The innumerous studies on the plant selection mechanism used by leaf-cutting ants show the researchers’ interest in this issue. Many classical studies propose that plants are selected according to the fungus garden nutritional needs and the absence of potentially harmful substances. This hypothesis is corroborated by behavioral experiments using cycloheximide (fungicide) with citric pulp or forage plants greatly accepted by leaf-cutting ants. According to this hypothesis, under the action of a fungicide, the fungus emits an allomone that informs worker ants that some food is inadequate to its growth. Although some authors state that the...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Leaf-cutting ants; Cycloheximide; Mortality; Formicide screening.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262018000300169

Population biology and secondary production of the stout razor clam Tagelus plebeius (Bivalvia, Solecurtidae) on a sandflat in southeastern Brazil
Provedor de dados: 103
Autores: Abrahão,Jolnnye R.; Cardoso,Ricardo S.; Yokoyama,Leonardo Q.; Amaral,A. Cecilia Z.
The population biology and production of the stout razor clam Tagelus plebeius Lightfoot, 1786 were investigated on an intertidal sandflat on the southeast coast of Brazil (Enseada Beach, São Sebastião, state of São Paulo) between April 1997 and April 1998. Two rectangular sites of 50 X 10 m parallel to the waterline were established, site A (upper intertidal level) and site B (middle intertidal level), where the samples were taken in an 0.5 x 0.5 m quadrat. High abundances were recorded in winter and spring, with no significant differences between the sites. The high bivalve abundances were related to the presence of very fine homogeneous sediment with low salinities. Tagelus plebeius had negative allometric growth, characteristic of deep burrowers for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundance; Growth; Intertidal zone; Mortality.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100009

Spatial and temporal variation in population structure of Hemigrammus marginatus (Characiformes: Characidae) in streams of the Ivinhema River Basin, Brazil
Provedor de dados: 103
Autores: Lourenço,Luzia da Silva; Fernandes,Izaias Médice; Súarez,Yzel Rondon.
The present study has assessed spatial and temporal variations in the length structure of Hemigrammus marginatus Ellis, 1911 and estimated growth parameters for the species. Sampling was carried out in five streams in the Vitória and Piravevê sub-basins of the Ivinhema River from January to December 2002. A total of 933 specimens of H. marginatus were caught (97 in the Vitória sub-basin and 836 in the Piravevê sub-basin). Mean length of the individuals caught in the Piravevê sub-basin was shorter (21.58 mm, SD = 4.67) than that of individuals caught in the Vitória sub-basin (29.24 mm, SD = 4.42). Analysis of condition factor calculated from the weight/length relationship revealed that the values were constant both spatially (between sub-basins) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Age; Growth; Mortality; Recruitment; Weight-length relationship.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000400003

Dinâmica populacional da matrinxã Brycon amazonicus (Characidae) na Amazônia Central
Provedor de dados: 103
Autores: Santos Filho,Leocy C. dos; Batista,Vandick da S.
The matrinxã, Brycon amazonicus (Spix &amp;amp; Agassiz, 1829) is one of the most important fishery resources of the Amazonas state. Its population dynamics in Central Amazon was analyzed based on total landing and biometry data registered in the main landing port of Manaus, between 1994 and 2002. Growth and mortality rates were estimated separately for the rivers Purus, Madeira and Solimões. Differences in size structure and growth curves suggest that different population units exist among these rivers, requiring individualized evaluation and fisheries management strategies. The analysis of the yield per recruit does not indicate overexploitation. However, the highest relative exploitation rate was observed in the Madeira river. The suggested management...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fisheries; Growth; Mortality; Stock.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000200001

Correlation between urinary tract infection and reproductive performance of sows
Provedor de dados: 96
Autores: Moura,Rafael de; Caldara,Fabiana Ribeiro; Foppa,Luciana; Machado,Simone Pereira; Nääs,Irenilza de Alencar; Garcia,Rodrigo Garófallo; Gonçalves,Liliane Maria Piano.
ABSTRACT This study aimed to assess the prevalence and influence of urinary tract infection on the reproductive performance of sows. The animals underwent urine tests using reagent strips and diagnosed as positive or negative. They were then divided into two groups of 30 positive and 30 negative sows for urinary tract infection. Each sow was considered an experimental unit and was followed from labor to weaning. The animals were assessed for their reproductive performance (labor duration, number of live births, mummified piglets, and stillbirths, and postpartum diseases). After weaning, the weaning-estrus interval and rate of return to estrus were assessed. A thermographic camera was used to identify hyperthermia of the mammary system and its relation with...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Animal health; Cystitis; Mortality; Pigs; Reproduction.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100410

Influence of pre and postnatal energy restriction on the productive performance of ewes and lambs
Provedor de dados: 96
Autores: Castro,Filipe Alexandre Boscaro de; Ribeiro,Edson Luis de Azambuja; Mizubuti,Ivone Yurika; Silva,Leandro das Dores Ferreira da; Barbosa,Marco Aurélio Alves de Freitas; Sousa,Cícero Leandro de; Paiva,Fernando Henrique Pereira de; Koritiaki,Natália Albieri.
The objective of this study was to evaluate the influence of feeding energy levels during the last third of gestation and lactation on performance of ewes and lambs up to weaning. The experiment was carried out in the sheep raising sector of Universidade Estadual de Londrina (UEL), from August to December of 2007. Thirty-two adult lambs with 105 days of gestation, average live weight of 57.55 kg and average body condition scores of 3.42 were used in the beginning of the experiment. The animals were confined in collective pens, distributed randomly in three treatments: 2.4; 2.2 and 2.0 Mcal of metabolizable energy (ME)/kg of dry matter (DM). Feed supply was ad libitum during the last third of gestation and lactation. Weaning occurred at 70 days. Body...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body condition; Milk production; Mortality; Sheep; Weight gain.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400017

Preliminary observations of cadmium and copper effects on juveniles of the polychaete Capitella sp. Y (Annelida: Polychaeta) from Estero del Yugo, Mazatlán, México
Provedor de dados: 97
Autores: MÉNDEZ,NURIA; GREEN-RUIZ,CARLOS.
The effects of cadmium (Cd) and copper (Cu) on cultured juveniles of Capitella sp. Y were investigated. Seven-day old juveniles were exposed to 13 (control), 60, 160, 240 and 340 mg Cd L-1 and 17 (control), 50, 120 and 150 mg Cu L-1 for 30 days. Mortality significantly increased with increasing Cu concentrations, but in Cd exposures, it was only evident at 340 mg L-1. Body size and faecal pellet production were reduced earlier in juveniles exposed to Cu than those exposed to Cd, especially in the higher Cu concentrations. These facts indicate that juveniles are more sensitive to Cu in terms of mortality, feeding and growth. Haemoglobin production was inhibited due to the scarcity of food in the experimental sediment rather than to metal exposure. Tube...
Tipo: Journal article
Palavras-chave: Bioassays; Marine worms; Mortality; Juveniles; Heavy metals.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000400009

Effects of some sesquiterpenes on the stored-product insect Tenebrio molitor (Coleoptera: Tenebrionidae)
Provedor de dados: 99
Autores: García,Matías; Sosa,Marta E.; Donadel,Osvaldo J.; Giordano,Oscar S.; Tonn,Carlos E.
In order to evaluate the allelochemical activity of some sesquiterpenes isolated from the native plant Tessaria absinthioides (Hook. et Arn.) DC, and some semi synthetic derivatives against Tenebrio molitor L. larvae, we have developed bioassays directed to quantify repellency, larval mortality, and its effects on the development. Although costic aldehyde caused the maximum repellent effect, all the compounds showed a significant effect at some dose or time, indicating behavioral avoidance. The topical application of costic aldehyde produced the largest increase on the duration of the pupal stage. Tessaric acid exhibited the highest toxicity by topical application at the experiment closure. Both eremophilane-1(10),2,11(13)-triene-12-oic, and &lt;img...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sesquiterpenes; Tenebrio molitor; Repellency; Development; Mortality.
Ano: 2003
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802003000200002

The influence of diet and isolation on growth and survival in the land snail Bulimulus tenuissimus (Mollusca: Bulimulidae) in laboratory
Provedor de dados: 104
Autores: Meireles,Liliane M. O.; Silva,Lidiane C.; Junqueira,Flávia O.; Bessa,Elisabeth C. A.
Feed influences directly growth and survival in land snails. Here, we investigate the influence of diet and isolation on growth and survival in Bulimulus tenuissimus (d'Orbigny, 1835) in the laboratory. Animals were maintained individually and in groups and three different types of diets: lettuce, ration and both lettuce and ration (mixed diet) for 210 days. Isolated animals, in all diet types, grew more rapidly than grouped animals. Also, snails fed with lettuce grew most slowly in isolated or grouped treatments. Within isolated or grouped treatments, growth rates were similar for the ration and the mixed diet. Mortality rate was higher in animals fed on lettuce only, in both density treatments. Thus, diet and density are important components of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet; Feed; Land snail; Mortality.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200010

Roadkills of vertebrates in Venezuela
Provedor de dados: 104
Autores: Pinowski,Jan.
This paper presents an analysis of vertebrate roadkills in five different habitats of tropical South America. Observations of vertebrate roadkills were conducted in 1978, on a 572 km road between Caracas and Mantecal/Apure in Venezuela, during the rainy season (June-October). During five passages on this route, which includes five distinct habitats, 79 vertebrate carcasses - mammals and reptiles - were found. If we assume that the carcasses remain for two days on the road, vehicles can be expected to strike 350 spectacled caimans Caiman crocodilus Linnaeus, 1758 (Alligatoridae) during the rainy season alone. Similar calculations for other species yield 313 snakes and lizards, 294 opossums Didelphis marsupialis Linnaeus, 1758 (Didelphidae), 220 crab-eating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mammals; Mortality; Reptiles.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100023

Effect of body size heterogeneity on the aggressive behavior of larvae of matrinxã, Brycon amazonicus (Characiformes, Bryconidae)
Provedor de dados: 36
Autores: CARVALHO,Thaís Billalba; SOUZA,Ellen Cristina Monteiro de; PINHEIRO-DA-SILVA,Jaquelinne; VILLACORTA-CORREA,Marle Angélica.
ABSTRACT Brycon amazonicus is a native Amazonian fish that is important for aquaculture in South America. Larval mortality is high in this species in intensive breeding systems due to aggressiveness among larvae. The present study investigated experimentally the effects of body size heterogeneity on the aggressive behavior and survival of B. amazonicus during the early stages of larval development. Two treatments (larvae groups with homogeneous and heterogeneous body size) were evaluated throughout early larval stages tested at six time points: 12, 24, 36, 48, 60 and 72 hours after hatching (HAH). Two experiments quantified, respectively, aggressive interactions and mortality rates among larvae at each time point. The frequency of aggressive interactions...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aggressiveness; Fish; Larviculture; Mortality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000400304

Survival dynamics of Melocactus conoideus Buining &amp;amp; Brederoo (Cactaceae), a threatened species endemic to northeastern Brazil
Provedor de dados: 39
Autores: Luz-Freire,Hévila Prates; Trindade,Diego Pires Ferraz da; Sá-Neto,Raymundo José de; Corrêa,Michele Martins.
Studies on the survival of species are essential to understanding their biology and to developing effective conservation and management plans. This study aimed to determine the best model to explain the survival of the species Melocactus conoideus on the basis of time, density, age structure and habitat location, as well as to describe the interactions among those factors. The study was conducted in three M. conoideus habitat patches in the municipality of Vitória da Conquista, in the state of Bahia, Brazil, only one of which was within a "conservation unit" (protected area). In each patch, we selected 120 specimens of M. conoideus, which were marked with identification plates and classified by developmental stage and density. The survival of those...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cactus; Mortality; Population ecology; Spatial aggregation.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000200016

Post-fire dynamics of the woody vegetation of a savanna forest (Cerradão) in the Cerrado-Amazon transition zone
Provedor de dados: 39
Autores: Reis,Simone Matias; Lenza,Eddie; Marimon,Beatriz Schwantes; Gomes,Letícia; Forsthofer,Mônica; Morandi,Paulo Sérgio; Marimon Junior,Ben Hur; Feldpausch,Ted R.; Elias,Fernando.
ABSTRACTFire can change the species composition, diversity, and structure of savanna vegetation, thus altering growth and mortality rates. Such changes in the woody vegetation of burned savanna forest were evaluated over four years in comparison to unburned savanna forest. All woody plants with a diameter at breast height &gt; 10 cm were measured in 100 permanent plots. Six months later, 38 of these plots were burned. Three and a half years later, all surviving individuals were re-sampled. Species richness, diversity, and the number of individuals did not change in the burned plots, although they had significantly higher (p &lt; 0.05) increases in basal area and mortality rates (5.1% year-1) than the unburned plots (3.0% year-1).Tachigali vulgarishad the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Land-use change; Mortality; Structural and floristic changes; Wildfire.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000300408

Temporal changes in species composition, diversity, and woody vegetation structure of savannas in the Cerrado-Amazon transition zone
Provedor de dados: 39
Autores: Maracahipes-Santos,Leonardo; Santos,Josias Oliveira dos; Reis,Simone Matias; Lenza,Eddie.
ABSTRACT Vegetation in the transition between tropical forest and savanna is hyperdynamic and there is evidence that in the absence of fire, forest advances over savanna. Between 2008 and 2013 we evaluated changes in species composition and diversity and in the structure of the woody vegetation of savanna physiognomies in the transition between the Cerrado and Amazon biomes that were fire free for 11 years. The physiognomies form a gradient from savanna woodland (Typical Cerrado - TC), to low woodland (Dense Cerrado - DC), to woodland (locally called Cerradão - CO). We hypothesise that: 1) the more open physiognomies (TC and DC) are more dynamic compared to the closed physiognomy (CO); and 2) in the absence of fire vegetation tends to become more forested....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternative stable states; Biodiversity; Brazilian savanna; Conservation; Mortality; Recruitment.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200254

Mortality and diameter growth of lianas in a semideciduous forest fragment in Southeastern Brazil
Provedor de dados: 39
Autores: Lombardi,Julio Antonio; Temponi,Lívia Godinho; Leite,Claudia Aparecida.
This is a 30-month study of mortality rates and diameter growth rates of lianas in a semideciduous forest fragment in Belo Horizonte, Minas Gerais State, Brazil. Results are presented for 484 specimens of lianas, of which 103 experienced individual mortality (21.3% of the sampled population). Mortality varied according to class of stem diameter, but did not vary throughout the months of year, or between seasons or years. Mortality rates were higher than those recorded in other studies, perhaps due to the age of this secondary forest. Stem diameter growth rates were measured for 385 lianas, the survivors after 30 months plus four plants that died just before the final census, and averaged 1.2mm/year, ranging from 0mm/year (Chioccoca alba) to 4.8mm/year...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lianas; Mortality; Diameter growth; Minas Gerais State; Secondary forest.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33061999000200005

Woody vegetation dynamics in a floodplain campo de murundus in central Brazil
Provedor de dados: 39
Autores: Pinto,José Roberto Rodrigues; Mews,Henrique Augusto; Jancoski,Halina Soares; Marimon,Beatriz Schwantes; Bomfim,Bárbara de Oliveira.
Campos de murundus (grasslands dotted with knolls that are covered with savanna-like woody vegetation) are a common landscape in central Brazil. In this study, we assessed for the first time the dynamics of the vegetation in a floodplain campo de murundus, describing changes in composition and structure of the woody vegetation. In 2005, we established 16 permanent 25 × 25 m plots, where we identified and mapped individuals with a trunk diameter at the base ≥ 2.86 cm, as well as measuring the height of those individuals. In 2008 (after two fire events), we resampled the plots. In 2005, we had registered 4.54 m² ha-1 of basal area, 430 individuals, 42 species, 36 genera and 24 families. In 2008, we found an increase in basal area (to 4.65 m² ha-1) and a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Earth mounds; Fire; Mortality; Recruitment; Savanna.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000400005

Desempenho reprodutivo de coelhas submetidas a diferentes níveis de energia digestível nas dietas e idades de desmama de suas ninhadas - DOI: 10.4025/actascianimsci.v31i2.6619
Provedor de dados: 2
Autores: Silva, Waldirene Rossi da; UEM; Scapinello, Cláudio; UEM; Moraes, Gentil Vanini de; UEM; Martins, Elias Nunes; UEM; Faria, Haroldo Garcia de; UEM; Ferreira, Walter Motta; UFMG.
Foram utilizadas 240 ninhadas oriundas de 80 matrizes NZB, nulíparas, durante três ciclos reprodutivos, submetidas a um ritmo de reprodução de 42 dias, distribuídas em um delineamento inteiramente casualizado, em esquema fatorial 2 x 2 x 3 (2.600 e 2.800 kcal ED kg-1 de ração versus desmama aos 28 e 35 dias versus três ciclos reprodutivos). O nível de ED nas rações não afetou o peso das matrizes na desmama de seus láparos e as taxas de fertilidade, independente do ciclo reprodutivo. A melhor condição corporal nos três ciclos das matrizes que desmamaram seus láparos aos 28 dias, permitiu taxas de fertilidade mais altas durante todo o período experimental. À exceção do tamanho da ninhada ao nascer, que foi menor no primeiro parto, o tamanho da ninhada aos 21...
Tipo: Pesquisa de campo
Palavras-chave: Produção Animal; Nutrição de não-ruminantes desempenho de láparos; Tamanho da ninhada; Condição corporal da matriz; Taxa de mortalidade; Fertilidade 5.04.05.00-4 litter performance; Litter size; Corporal condition of does; Mortality; Fertility.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/6619

Population dynamics of the yellow piranha Serrasalmus spilopleura Kner, 1858 (Characidae, Serrasalminae) in Amazonian floodplain lakes - doi: 10.4025/actascibiolsci.v35i3.15749
Provedor de dados: 3
Autores: Sousa, Fabricio Barros de; Universidade Federal Rural da Amazônia; Soares, Maria Gercilia Mota; Instituto Nacional de Pesquisas da Amazônia; Prestes, Luiza; Universidade do Estado do Amapá.
Fish is the main source of protein in the Amazon and fishing is one of the most important sources of income for the Amazonian population. Serrasalmus spilopleura is a species that have been increasingly consumed by riverside communities, although it is only occasionally commercialized at regional markets. Therefore, this work sought to generate information about the population biology of S. spilopleura captured in floodplain lakes, Jaitêua and São Lourenço, in Manacapuru, Amazonas State. The population parameters were estimated by analyzing the distribution of the length frequency with the help of the ELEFAN I routine of the FISAT II program. The weight/length relationship was estimated by linear regression, longevity by Taylor’s method, rate of natural...
Tipo: Population dynamics of fish
Palavras-chave: 2.05.00.00-9 growth; Mortality; Freshwater fish; Weight/length relationship; ELEFAN Ecologia.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/15749

Bees (Hymenoptera: Apidae) present in the flowers of the balsa wood Ochroma lagopus Swartz, 1788 - doi: 10.4025/actascibiolsci.v32i4.7103
Provedor de dados: 3
Autores: Brighenti, Deodoro Magno; Universidade Federal de Lavras; Brighenti, Carla Regina Guimarães; Universidade Federal São João Del-Rei.
The flower of balsa wood holds about 10 to 15 mL of nectar, which helps attracting pollinating agents, since the genus Ochroma is incapable of self-fertilization. However, a high mortality of bees is observed in these flowers. The present study investigated the frequency and constancy of mortality of the individuals of the family Apidae that fed on nectar from the balsa wood. Data was gathered from June to August 2008, in Lavras – Minas Gerais State, Brazil. In addition, the survival of the Africanized bees that fed on the nectar of this flower was compared to those that fed on 50% aqueous solution of honey. Forty flowers were analyzed, and 949 individuals of the orders Hymenoptera (98.1%), Hemiptera (0.95%), Coleoptera (0.74%) and Diptera (0.21%) were...
Tipo: Estudos de mortalidade
Palavras-chave: 2.05.03.00-8 Apis; Constancy; Mortality; Partamona; O. pyramidale Ecologia Aplicada Apis; Constancy; Mortality; Partamona; O. pyramidale.
Ano: 2010
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7103

Ferns influence on the woody species seedling bank in semi-deciduous forest, Southern Brazil
Provedor de dados: 3
Autores: Carvalho, Eloisa de Souza; Pimenta, José Antonio; Bianchini, Edmilson.
Different species of plants can act as environmental filters affecting the composition, structure and spatial distribution of seeds and seedlings of forest species. This study aimed to examine whether the presence of the fern stratum acts as a biotic environmental filter on the woody species seedling bank in a semi-deciduous forest remnant (Atlantic biome), Southern Brazil. Two experiments were developed in areas with ferns (F) and ferns-free (NF): a) richness and abundance of woody seedling bank were determined in 10 plots (25 m2) in each area; b) seedlings abundance of Actinostemon concolor (Spreng.) Müll. Arg., Aspidosperma polyneuron Müll. Arg., Euterpe edulis Mart., Guarea kunthiana A. Juss. and Inga marginata Kunth were monitored for a year in three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atlantic forest; Environmental filter; Mortality; Recruitment; Regeneration Botânica; Ecologia terrestre.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/31135

Challenge of pacu (Piaractus mesopotamicus) fed diets supplemented with vitamins C and E by Aeromonas hydrophila under different temperature
Provedor de dados: 45
Autores: Garcia,F.; Moraes,F.R.; Martins,M.L.
Pacu Piaractus mesopotamicus fed diets supplemented with three vitamins C and E levels (zero, 250, and 500mg vitamin/kg diet) were challenged with Aeromonas hydrophila under different temperatures. Fish were kept in 300L plastic tanks and fed during the first 60 days with diets without vitamins C and E, in an attempt to reduce vitamin sources. After this period, fish were maintained at an initial density of 14 fish/tank and test diets were offered during 60 days. At the end of the experiment, all fish were infected with 6×10(6)CFU of A. hydrophila/fish, intraperitoneally injected. No interaction of dietary levels of vitamin C vs. E on mortality was observed. Supplementation with vitamins C and E did not decrease the mortality rate of fish challenged with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Piaractus mesopotamicus; Vitamin C; Vitamin E; Aeromonas hydrophila; Mortality.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352009000200014

Hypoxia increases susceptibility of Pacific white shrimp to whitespot syndrome virus (WSSV)
Provedor de dados: 45
Autores: Lehmann,M.; Schleder,D.D.; Guertler,C.; Perazzolo,L.M.; Vinatea,L.
The present study aimed to evaluate the mortality, reactive oxygen species production (ROS) and total hemocyte counts (THC) of the marine shrimp Litopenaeus vannamei infected with the white spot syndrome virus (WSSV) at three levels of oxygen saturation. For this, 360 shrimp (20±2g) were distributed in 24 tanks (60L), divided in two groups (infected and non-infected), which were subjected to 30, 60 and 100% of dissolved oxygen saturation (in quadruplicate). During 96 hours after infection, daily hemolymph samples were collected for hemato-immunological parameter evaluation (THC and ROS) and dead animals were removed and computed to assess cumulative mortality rates. In the infected group, animals subjected to 100% saturation showed higher ROS production...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Litopenaeus vannamei; WSSV; Dissolved oxygen saturation; Immune response; Mortality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000200397

Mortality on grower/finisher-only swine operations in the United States
Provedor de dados: 45
Autores: Losinger,W.C.; Bush,E.J.; Smith,M.A.; Corso,B.A.
For 53 grower/finisher-only swine operations that participated in the United States National Animal Health Monitoring System 1995 National Swine Study, mortality among finisher pigs ranged from 0 to 12.0% over a 6-month period. Twenty-six (49.1%) had &lt;2% mortality, and 27 (50.9%) had &gt;2% mortality. Nine (17.0%) operations experienced &gt;4% mortality. Fisher's exact test revealed that operations with all-in all-out management were significantly more likely to have &lt;2% mortality than operations with continuous management, and that operations where all finisher pigs came from farrowing units belonging to the operation (either on-site or off-site) were significantly more likely to have &lt;2% mortality than operations where &gt;1 grower/finisher pig...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pig; Swine grower/finisher; Mortality; Animal health.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09351999000200003

Relationship between clinical symptomatology on the isolation of Salmonella Gallinarum of japanese quail (Coturnix coturnix)
Provedor de dados: 45
Autores: Rocha-e-Silva,R.C.; Cardoso,W.M.; Horn,R.V.; Cavalcanti,C.M.; Beleza,A.J.F.; Almeida,C.P.; Bezerra,W.G.A.; Carmo,C.C.; Nogueira,C.H.G.; Lima,B.P.; Marques,A.R.; Teixeira,R.S.C.
ABSTRACT Salmonella Gallinarum is capable of causing high mortality in birds of the order Galliformes. This study aimed to relate the presence of clinical signs with the recovery of Salmonella Gallinarum from organs and c loacal swabs of Japanese quails (Coturnix coturnix) experimentally infected. A total of 70 female quails were housed in a pair per cage and divided in two groups (IG: quails inoculated with 1.5x106 CFU of Salmonella Gallinarum Nalr/mL and CG: control group). After the inoculation, birds were evaluated three times a day to verify the presence of clinical signs. Birds that presented ruffled feathers, eyes closed and remained quiet in the cage were removed for euthanasia, as well as the same number of birds from the inoculated groups that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Immune response; Isolated; Mortality; Clinical signs.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000401187

Performance of low birth-weight piglets upon protein-energy and/or colostrum supplementation
Provedor de dados: 45
Autores: Viott,R.C.; Menezes,T.A.; Mellagi,A.P.G.; Bernardi,M.L.; Wentz,I.; Bortolozzo,F.P.
ABSTRACT The study aimed to investigate the effect of oral protein-energy supplement (OPES) and/or extra colostrum within the first few hours of life on the survival and growth performance of low birth-weight piglets during the suckling period. Based upon nutritional strategy, low-birth-weight piglets (804−1309g) were randomly allocated into four groups: C0S0 (control group, n= 300) - no supplementation; C1S0 (n= 299) - supplementation with 50mL of a colostrum pool through an orogastric tube; C0S1 (n= 298) - oral supplementation with 8mL oral OPES; C1S1 (n= 297) - supplementation with both 50mL of colostrum and 8mL of OPES. The piglets’ body weight was monitored at birth, 24h after birth, on day 7, day 14 and day 20 post-partum. Both colostrum and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Supplementation; Colostrum; Weight gain; Mortality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000401293

Studies on parasitemia courses and mortality in mice infected with genetically distant Trypanosoma cruzi clonets
Provedor de dados: 48
Autores: WALLACE,ANNE; ORTÍZ,SILVIA; SÁNCHEZ,GITTITH; VILLAGRA,REBECA; MUGA,MABEL; SOLARI,ALDO.
The biological characterization of bloodstream forms of eleven Trypanosoma cruzi cloned stocks, corresponding to two genetically similar clonets (&lt;A HREF="#19"&gt;19&lt;/A&gt; and &lt;A HREF="#20"&gt;20&lt;/A&gt;) and one distant clonet (39), according to multilocus enzyme electrophoresis analysis, showed dissimilar parasitemia in an experimental isogenic mouse model. While clonet 39 stocks gave low parasitemias, clonets 19 or 20 stocks gave high parasitemias, independently of the inocula (10² and 10(4) bloodstream forms) used. High parasitemia did not always associate with greater mortality. Statistical studies on mortality using a low inocula showed significantly higher mortality with clonet 39 stocks when compared to clonets 19 or 20 stocks. Finally,...
Tipo: Journal article
Palavras-chave: Trypanosoma cruzi; Clonets; Parasitemia; Mortality; Bloodstream forms; Multilocus enzyme electrophoresis.
Ano: 2001
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602001000200011

Alcohol and Mortality from All Causes
Provedor de dados: 48
Autores: RENAUD,SERGE; LANZMANN-PETITHORY,DOMINIQUE; GUEGUEN,RENÉ; CONARD,PASCALE.
A large number of prospective studies have observed an inverse relationship between a moderate intake of alcohol and coronary heart disease morbidity and mortality. Concerning death from all-causes, results are not unanimous. Alcohol intake was associated with a protection of all-cause mortality in England and USA physicians and the large study of the American Cancer Society. None of these studies separated the effects of different alcoholic beverages. In our prospective studies in France on 35 000 middle-aged men, we observed that only wine at moderate intake, was associated with a protective effect on all-cause mortality. The reason was that in addition to the known effect on cardiovascular diseases, a very moderate intake of wine, protected also from...
Tipo: Journal article
Palavras-chave: Alcohol; Mortality; Wine.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000200002

Dangerous neighborhood: saurophagy between syntopic Tropidurus lizards
Provedor de dados: 49
Autores: Passos,Daniel Cunha; Monteiro,Felipe Augusto Correia; Nogueira,Carlos Henrique de Oliveira.
Saurophagy constitutes an important source of mortality among lizards and has been reported for the genus Tropidurus. However, the extension of this behavior remains unknown. Herein, we record the predation of T. jaguaribanus by its congener T. hispidus. This is the first report of saurophagy among different species of syntopicTropidurus. Furthermore, whereas published records of saurophagy tend to be directed against juveniles, this case involved two adult individuals.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Predation; Mortality; Agonistic interactions; Tropiduridae; Caatinga.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000100405

Population aspects of Bryconamericus stramineus in streams of the upper Paraná River basin, Brazil
Provedor de dados: 49
Autores: Vasconcelos,Lilian Paula; Súarez,Yzel Rondon; Lima-Junior,Sidnei Eduardo.
In order to describe some aspects of the population ecology of Bryconamericus stramineus in the Guiraí River basin, upper Paraná River basin, samples were taken bimonthly from October 2006 to August 2007 at seven sites in the basin. A total of 960 individuals, including 532 females, 316 males, and 112 of undetermined sex, were collected. A significant variation in the sex ratio was observed (Χ2 = 32.82; p &lt; 0.001). Females were larger (59.7 mm) than males (58.9 mm); however, males showed a larger angular growth coefficient (b) than females. It was estimated that 50% of females were sexually mature at 36.4 mm. The highest rate of ovary development was observed in October, while in June 2007 no mature females were found. Mean fecundity was estimated at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Length-weight relationship; Mortality; Reproductive strategy; Sex ratio.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200006

Mortality of Kalliapseudes schubartii in unvegetated soft bottoms of the estuarine region of the Lagoa dos Patos
Provedor de dados: 52
Autores: Fonseca,Duane Barros; D'Incao,Fernando.
Studies were carried iut on seasonal mortality by taking samples of Kalliapseudes schubartii (Crustacea: Tanaidacea) for a year in the estuarine region of the Lagoa dos Patos (southern Brazil). Results demonstrated no significant difference in seasonal mortality rates, which suggest that populations of K. schubartii was heavily preyed on year round and that an assumption of a significantly higher mortality in summer/autumn than in spring/winter might not be held in unvegetated soft bottoms of the estuarine regions of the Lagoa dos Patos.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tanaidacea; Kalliapseudes schubartii; Mortality.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300011

Spatial heterogeneity and its influence on Copaifera langsdorffii Desf. (Caesalpiniaceae)
Provedor de dados: 52
Autores: Resende,Júlio Carlos França; Klink,Carlos Augusto; Schiavini,Ivan.
Population dynamics and structure of young individuals of the tree Copaifera langsdorffii Desf. (Caesalpiniaceae) were studied in the gallery forest of the Panga Ecological Station, Uberlândia, MG, Brazil. Three distinct habitats were recognized in this forest, Dike, Middle and Edge zone. Four annual surveys of plant height, diameter at plant base and density were made between 1993 and 1996. The species showed an aggregated distribution in all three habitats. Population structure in all four surveys presented the typical reversed "J" form, characteristic of populations in local regeneration. For the whole population, mortality rates during the four years were constant and low (average of 4.8 % per year), while recruitment declined during the same period...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gallery forest; Seedling; Recruitment; Mortality; Growth; Saplings.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300012

Time of catheter removal in candidemia and mortality
Provedor de dados: 55
Autores: Nucci,Marcio; Braga,Paula Rocha; Nouér,Simone A.; Anaissie,Elias.
ABSTRACT  Background: The impact of central venous catheter (CVC) removal on the outcome of patients with candidemia is controversial, with studies reporting discrepant results depending on the time of CVC removal (early or any time during the course of candidemia).  Objective: Evaluate the effect of time to CVC removal, early (within 48 h from the diagnosis of candidemia) vs. removal at any time during the course of candidemia, on the 30-day mortality.  Methods: Retrospective cohort study of 285 patients with candidemia analyzing CVC removal within 48 h (first analysis) or at any time (second analysis).  Results: A CVC was in place in 212 patients and was removed in 148 (69.8%), either early (88 patients, 41.5%) or late (60 patients, 28.3%). Overall, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Candidemia; Central venous catheter; Mortality; Multivariate analysis; Candida.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702018000600455

Impact of macrolide therapy on mortality of HIV-infected patients with community-acquired pneumonia in a tertiary teaching hospital
Provedor de dados: 55
Autores: Mello,Claudia Figueiredo; Negra,Marinella Della.
BACKGROUND: Bacterial pneumonia is one of the main causes of morbidity and mortality in patients infected by the human immunodeficiency virus (HIV). The main objective of this study was to evaluate the effect of macrolide therapy in combination with a beta-lactam based empiric regimen for inpatients with community-acquired pneumonia and HIV. METHODS: This is a retrospective cohort study of hospitalized patients. Adult patients who had received treatment with ceftriaxone or ceftriaxone plus clarithromycin were included. RESULTS: 76 patients met the inclusion criteria. Among baseline characteristics analyzed, only respiratory rate showed significant difference: patients who had received clarithromycin were more likely to have a respiratory rate &gt; 30/min...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: HIV; Pneumonia; Macrolides; Mortality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702011000300014

Childhood pneumonia: clinical aspects associated with hospitalization or death
Provedor de dados: 55
Autores: Nascimento-Carvalho,Cristiana M.C.; Rocha,Heonir; Santos-Jesus,Rogério; Benguigui,Yehuda.
OBJECTIVE: To determine which available information at an Emergency Room (ER) consultation is associated with hospitalization or death among children with pneumonia. DESIGN: Prospective cohort study. SETTING: The ER of one university and one private hospital. MEASUREMENT: Using stepwise logistic regression we analyzed factors that showed a univariate association. MAIN RESULTS: Of 2,970 cases, the median age was 1.83 years (range 2 days to 14.5 yrs, mean 2.76 + 2.72 yrs); 25.8% were hospitalized and 0.8% died. Age (2-11 mos, OR 0.4 [0.2-0.6]; 12-59 mos, OR 0.2 [0.1-0.4]; &lt;FONT FACE=Symbol&gt;³&lt;/FONT&gt; 5yrs, OR 0.1 [0.08-0.3]), malnutrition (OR 2.0 [1.4-2.7]), underlying chronic illness (OR 1.4 [1.1-1.8]), tachypnea (OR 1.8 [1.4-2.4]), chest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pneumonia; Children; Clinical signs; Hospitalization; Mortality; Outpatients.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702002000100004

Transitioning through AIDS epidemics - gender and temporality
Provedor de dados: 55
Autores: Pinto,Clarice Souza; Fernandes,Carlos Eurico dos Santos; Oliveira,Roberto Dias de; Matos,Vanessa Terezinha Gubert de; Castro,Ana Rita Coimbra Motta de.
ABSTRACT  OBJECTIVE:  To understand the evolution of AIDS over time in Mato Grosso do Sul, Brazil, using incidence, lethality, and mortality coefficients.  METHODS:  A descriptive epidemiological study based on time series analysis of secondary data from the Notifiable Diseases Information System reported between 1985 and 2012.  RESULTS:  The prevalence of AIDS was higher among men, with evidence of feminization during the first 14 years of the epidemic. There was no statistically significant sex difference in AIDS lethality. Women were 1.3 times more likely to survive than men.  CONCLUSIONS:  Gender differences must be considered when designing new HIV/AIDS prevention strategies.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Aids; Mortality; Lethality; Incidence.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000600657

Clinical presentation of leptospirosis: a retrospective study of 201 patients in a metropolitan city of Brazil
Provedor de dados: 55
Autores: Daher,Elizabeth F; Lima,Rafael SA; Silva Júnior,Geraldo B; Silva,Eveline C; Karbage,Nahme NN; Kataoka,Raquel S; Carvalho Júnior,Paulo C; Magalhães,Max M; Mota,Rosa MS; Libório,Alexandre B.
INTRODUCTION: leptospirosis is a zoonosis of worldwide importance. The disease is endemic in Brazil. This study was conducted to describe the clinical and laboratory presentation of leptospirosis in a metropolitan city of Brazil. METHODS: this is a retrospective study including 201 consecutive patients with leptospirosis admitted to tertiary hospitals in Fortaleza, Brazil, between 1985 and 2006. All patients had clinical and epidemiological data suggestive of leptospirosis, and positive laboratorial test for leptospirosis (microscopic agglutination test, MAT, higher than 1:800). RESULTS: a total of 201 patients were included, with mean age of 38.9 ± 15.7 years; 79.1% were male. The mean length from onset of symptoms to admission was 7 ± 3 days. The main...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leptospirosis; Clinical manifestations; Laboratory findings; Mortality.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000100002

Factors influencing the early mortality in haematological malignancy patients with nosocomial Gram negative bacilli bacteraemia: a retrospective analysis of 154 cases
Provedor de dados: 55
Autores: Metan,Gökhan; Demiraslan,Hayati; Kaynar,Leyla Gül; Zararsız,Gökmen; Alp,Emine; Eser,Bülent.
BACKGROUND: The aim of this study is to assess the factors influencing the early mortality (7- day after index blood culture) in haematological malignancy patients with Gram negative bacilli (GNB) bacteraemia. METHODS: Infection control committee records were reviewed to identify the cases between March 2006 and June 2011. Only one bacteraemic episode per patient was included in the study. RESULTS: A total of 154 patients with GNB bacteraemia were identified. The early mortality rate was 19.5% (30 out of 154). Blood cultures revealed Enterobacteriacea in 120 patients (Escherichia coli; 86, Klebsiella spp.; 28, Enterobacter cloacea; 6) and glucose non-fermenting GNB in 34 patients (Pseudomonas aeruginosa; 15, Acinetobacter baumannii; 11, Stenotrophomonas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Haematological malignancy; Bacteraemia; Gram negative bacilli; Mortality; Extended-spectrum beta-lactamase; Intensive care unit; Multidrug resistance.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702013000200005

Application of the ATLAS score for evaluating the severity of Clostridium difﬁcile infection in teaching hospitals in Mexico
Provedor de dados: 55
Autores: Hernández-García,Raúl; Garza-González,Elvira; Miller,Mark; Arteaga-Muller,Giovanna; Galván-de los Santos,Alejandra María; Camacho-Ortiz,Adrián.
Background: For clinicians, a practical bedside tool for severity assessment and prognosis of patients with Clostridium difﬁcileinfection is a highly desirable unmet medical need.Setting: Two general teaching hospitals in northeast Mexico.Population: Adult patients with C. difﬁcileinfection.Methods: Prospective observational study.Results: Patients included had a median of 48 years of age, 54% of male gender and an average of 24.3 days length of hospital stay. Third generation cephalosporins were the antibiotics most commonly used prior to C. difﬁcileinfection diagnosis. Patients diagnosed with C. difﬁcileinfection had a median ATLAS score of 4 and 56.7% of the subjects had a score between 4 and 7 points. Patients with a score of 8 through 10 points had...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clostridium difﬁcile; Prediction rule; Mortality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000400399

Factors associated with mortality in HIV patients failing antiretroviral therapy, in Salvador, Brazil
Provedor de dados: 55
Autores: Haguihara,Tatiana; Silva,Márcio da Oliveira; Rebouças,Monaliza Cardozo; Martins Netto,Eduardo; Brites,Carlos.
ABSTRACT Highly active antiretroviral therapy (HAART) has significantly improved survival of people living with HIV/Aids (PLWHA). However, poor treatment adherence to HAART and other problems, still cause therapy failure and contribute to increased morbidity and mortality of PLWHA. In this retrospective cohort study (2013-2015), we sought to evaluate the factors associated with mortality of PLWHA failing HAART in 2013, who were receiving care at a reference center for sexually transmitted diseases (STD) and HIV/AIDS. A total of 165 individuals over 18 years of age who were failing antiretroviral therapy were evaluated. In two-year follow-up, 19 (11.5%) deaths were documented. There were a significant association between mortality and report of illicit drug...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Virologic failure; Mortality; HIV.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702019000300160

Clinical and economic impact of generic versus brand name meropenem use in an intensive care unit in Colombia
Provedor de dados: 55
Autores: Ordóñez,Karen; Feinstein,Max M.; Reyes,Sergio; Hernández-Gómez,Cristhian; Pallares,Christian; Villegas,María V.
Abstract  Background: Recent studies suggest that sustained use of generic antibiotics may be associated with clinical failure and emergence of antibacterial resistance. The present study was designed to determine the clinical outcome between the use of generic meropenem (GM) and brand-name meropenem (BNM). Additionally, this study evaluated the economic impact of GM and BNM to determine if the former represents a cost-effective alternative to the latter.  Methods: Patients treated between January 2011 and May 2014 received GM while patients treated between June 2014 and March 2017 received BNM. Mortality was compared between groups. Total infection cost was defined by the cost of antimicrobial consumption, length of stay, and laboratory and imaging exams...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Generic drugs; Meropenem; Mortality; Costs; Critical care; Gram negative bacteria.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702019000400237

Georeferencing of deaths from sepsis in the city of São Paulo
Provedor de dados: 55
Autores: Diament,Décio; Colombari,Fernando; Cypriano,Adriana Serra; Lisboa,Luis Fernando; dos Santos,Bento Fortunato Cardoso; Cendoroglo Neto,Miguel; Serpa Neto,Ary; Silva,Eliezer.
Abstract  Objective The aim of the present study was to obtain information about deaths due to sepsis in São Paulo from 2004 to 2009 and their relationship with geographical distribution.  Methods Causes of death, both main and secondary, were defined according to the codes of the International Classification of Disease version 10 (ICD-10) contained in the database. Sepsis, septic shock, multiple organ failure, pneumonia, urinary tract infection, peritonitis and other intraabdominal infections, skin and soft tissue infections (including surgical wound infection) and meningitis were considered as immediate cause of death or as the condition leading to the immediate cause of death related or associated to sepsis.  Results In the analyzed period, there was a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sepsis; Mortality; Infection; Georeferencing.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000200149

A cost-effectiveness analysis of two different antimicrobial stewardship programs
Provedor de dados: 55
Autores: Okumura,Lucas Miyake; Riveros,Bruno Salgado; Gomes-da-Silva,Monica Maria; Veroneze,Izelandia.
Abstract There is a lack of formal economic analysis to assess the efficiency of antimicrobial stewardship programs. Herein, we conducted a cost-effectiveness study to assess two different strategies of Antimicrobial Stewardship Programs. A 30-day Markov model was developed to analyze how cost-effective was a Bundled Antimicrobial Stewardship implemented in a university hospital in Brazil. Clinical data derived from a historical cohort that compared two different strategies of antimicrobial stewardship programs and had 30-day mortality as main outcome. Selected costs included: workload, cost of defined daily doses, length of stay, laboratory and imaging resources used to diagnose infections. Data were analyzed by deterministic and probabilistic sensitivity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial stewardship program; Cost-effectiveness; Mortality; Pharmacist.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000300006

The epidemiology of sepsis in a Brazilian teaching hospital
Provedor de dados: 55
Autores: Kauss,IAM; Grion,Cintia MC; Cardoso,LTQ; Anami,EHT; Nunes,LB; Ferreira,GL; Matsuo,T; Bonametti,AM.
OBJECTIVES: The objective of this study was to estimate disease incidence and mortality rate of sepsis in a tertiary public hospital. METHODS: Patients admitted to the Intensive Care Unit (ICU) in 2004 and 2005 were monitored for sepsis using an observational longitudinal study design. Patients were monitored daily for diagnostic criteria of sepsis, according to ACCP/SCCM Consensus Conference criteria, until either death or hospital discharge. RESULTS: During the study, we analyzed 1,179 patients. Systemic Inflammatory Response Syndrome (SIRS) was present in 1,048 (88.9%) patients on admission, and was associated with infection in 554 (47.0%) patients. Of these, sepsis was diagnosed in 30 (2.5%) patients, while severe sepsis was diagnosed in 269 (22.8%)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sepsis; Incidence; Mortality; Epidemiology.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702010000300011

Effects of statins on the development of sepsis and organ dysfunction in hospitalized older patients in China
Provedor de dados: 55
Autores: Gui,Qifeng; Yang,Yunmei; Zhang,Jiajia.
ABSTRACT This study aimed to evaluate the protective role of statins on the development of sepsis and infection-related organ dysfunction and mortality in a hospitalized older Chinese population with bacterial infections. In this retrospective cohort study, 257 older patients with bacterial infection were divided into two groups: a statin group, those who had received statin therapy for ≥1 month before admission and continued receiving statin during hospitalization; and a non-statin group, those who had never received statin or used statin for &lt;1 month prior to admission. A multivariate logistic regression analysis was performed to identify risk and protective factors for severe sepsis. A significantly lower incidence of organ dysfunction was found in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mortality; Organ dysfunction; Older adults; Sepsis; Statins.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000300255

The organization of Hospital Infection Control Committees and their importance in Brazil
Provedor de dados: 55
Autores: El Far,Fabiane; Marino,Cristiane G. J.; Medeiros,Eduardo Alexandrino Servolo.
The importance of Hospital Infection Control Committees (HICC) increases every year due to the emergence of multiresistant bacterial strains, hospital outbreaks, and other factors that cause HI. This demonstrates the fragility of the quality of hospital and medical care. Having a well-organized HICC benefits hospitals by improving quality, lowering costs and, most important, reducing patient morbidity and mortality. This review records the history of the development of HICCs, their present organizational structure, and offers recommendations for the best methods of infection surveillance.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hospital infection; Prevention; Committee; Control; Costs; Mortality; Surveillance; Quality.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702001000600001

Bacteremic pneumococcal pneumonia: serotype distribution, antimicrobial susceptibility, severity scores, risk factors, and mortality in a single center in Chile
Provedor de dados: 55
Autores: Fica,Alberto; Bunster,Nicolás; Aliaga,Felipe; Olivares,Felipe; Porte,Lorena; Braun,Stephanie; Dabanch,Jeannette; Hormázabal,Juan Carlos; Hernández,Antonio; Benavides,María Guacolda.
AIMS:Bacteremic pneumococcal pneumonia (BPP) is a severe condition. To evaluate seasonal distribution, mortality, serotype frequencies, antimicrobial susceptibility, and different severity scores among patients with BPP.PATIENTS AND METHODS:Patients were identified by laboratory data and restricted to adulthood. Standard methods were used for serotyping and antimicrobial susceptibility. Risk factors were analyzed by univariate and multivariate methods. Severity scores (APACHE II, CURB-65 and CAP PIRO) were compared using ROC curves.RESULTS:Sixty events of community-acquired BPP occurred between 2005 and 2010. A seasonal pattern was detected. Mean age was 72.1 years old (81.4% &gt;60 years). All had a predisposing factor. Previous influenza (3.3%) or...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptococcus pneumoniae; Bacteremia; Serotyping; Microbial drug resistance; Risk factors; Mortality; Elderly; CURB-65; APACHE II; PIRO.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000200115

Nosocomial infections in brazilian pediatric patients: using a decision tree to identify high mortality groups
Provedor de dados: 55
Autores: Lopes,Julia M.M.; Goulart,Eugenio M.A.; Siqueira,Arminda L.; Fonseca,Inara K.; Brito,Marcus V.S. de; Starling,Carlos E.F.
Nosocomial infections (NI) are frequent events with potentially lethal outcomes. We identified predictive factors for mortality related to NI and developed an algorithm for predicting that risk in order to improve hospital epidemiology and healthcare quality programs. We made a prospective cohort NI surveillance of all acute-care patients according to the National Nosocomial Infections Surveillance System guidelines since 1992, applying the Centers for Disease Control and Prevention 1988 definitions adapted to a Brazilian pediatric hospital. Thirty-eight deaths considered to be related to NI were analyzed as the outcome variable for 754 patients with NI, whose survival time was taken into consideration. The predictive factors for mortality related to NI (p...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epidemiology; Healthcare quality; Mortality; Nosocomial infection; Pediatric hospital.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000200008

Trends and characteristics of AIDS mortality in the Rio de Janeiro city after the introduction of highly active antiretroviral therapy
Provedor de dados: 55
Autores: Saraceni,Valéria; Cruz,Marly Marques da; Lauria,Lilian de Mello; Durovni,Betina.
We examined the characteristics of AIDS mortality in Rio de Janeiro city from 1995 to 2003. During this period, highly active antiretroviral therapy with protease inhibitors was made available, and it changed the pattern of the epidemics. There was a 47.5% reduction in the number of AIDS deaths within the period, with an increase in the proportion of women among the deceased; their schooling was lower than that of the men, similar to the trends of the national-level epidemics. The main place of death changed from university hospitals to emergency rooms. The proportion of cases reported to the National Diseases Surveillance System (SINAN) reported only through the death certificate remained high. Although there is free distribution of antiretrovirals by the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: AIDS; Mortality; Antiretrovirals.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000300003

Is nosocomial Escherichia coli bacteremia a predictive risk factor for mortality?
Provedor de dados: 55
Autores: Tuon,Felipe F.; Rocha,Jaime L.; Guadagnin,Fernanda A.; Alves,Márcia S.
The objective of this study was to determine risk factors associated with mortality in patients with nosocomial Escherichia coli bacteremia from January 2009 to January 2011. In a retrospective study the medical records of 88 patients over 18 years with nosocomial bacteremia caused by E. coli were analyzed. In univariate analysis several risk factors, including chronic renal failure, altered mental status, leukocytosis, and higher Charlson index of comorbidities were associated with mortality. In multivariate analysis only altered mental status remained independently associated with mortality. Mental confusion can be a risk factor for mortality in patients with E. coli bacteremia.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Nosocomial bacteremia; Escherichia coli; Mortality; Antibiotic therapy.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000100092

Comparison of clinical characteristics between healthcare-associated pneumonia and community-acquired pneumonia in patients admitted to secondary hospitals
Provedor de dados: 55
Autores: Lee,Jong Hoo; Kim,Yee Hyung.
BACKGROUND: Since healthcare-associated pneumonia (HCAP) is heterogeneous, clinical characteristics and outcomes are different from region to region. There can also be differences between HCAP patients hospitalized in secondary or tertiary hospitals. This study aimed to evaluate the clinical characteristics of HCAP patients admitted into secondary community hospitals. METHODS: This was a retrospective study conducted in patients with HCAP or community-acquired pneumonia (CAP) hospitalized in two secondary hospitals between March 2009 and January 2011. RESULTS: Of a total of 303 patients, 96 (31.7%) had HCAP. 42 patients (43.7%) resided in a nursing home or long-term care facility, 36 (37.5%) were hospitalized in an acute care hospital for &amp;gt; 2 days...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Health care; Pneumonia; Antibiotics; Mortality; Resistance.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000400002

Risk factors for mortality in patients with ventilator-associated pneumonia caused by carbapenem-resistant Enterobacteriaceae
Provedor de dados: 55
Autores: Tuon,Felipe F.; Graf,Maria Esther; Merlini,Alexandre; Rocha,Jaime L.; Stallbaum,Suellen; Arend,Lavinia N.; Pecoit-Filho,Roberto.
Abstract  Background: The ideal therapeutic option for ventilator associated pneumonia caused by carbapenem-resistant Enterobacteriaceae is not defined. The aim of this study was to assess mortality-associated risk factors in patients with VAP by CRE and determine the outcome of several treatment options.  Methods: This was a retrospective study performed in two tertiary hospitals involving patients with VAP caused by CRE between January 2010 and August 2014. The outcomes were mortality within 30 days of VAP diagnosis and overall mortality during hospital admission. Risk factors for mortality were assessed by comparing variables of survivors and non-survivors.  Results: One hundred and twelve patients with CRE-VAP were included, 73 (65%) male, median age...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbapenemase-producing Klebsiella pneumoniae; Ventilator-associated pneumonia; Risk factors; Mortality; Treatment.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000100001

Risk factors for mortality in burn children
Provedor de dados: 55
Autores: Rosanova,Maria Teresa; Stamboulian,Daniel; Lede,Roberto.
Studies about risk factors for mortality in burn children are scarce. We conducted this study to evaluate the risk factors for mortality in pediatric burn patients. We included 110 patients. Mean age was 31.5 months (range: 1 to 204). The burn surface was between 1% and 95%(median 27%) Type of burn was: A or superfitial in 39 patients (36%), AB or intermediate in 19 (17%), and B or full thickness in 52 (47%). Inhalatory injury was present in 52 patients (47%). Invasive procedures were: venous catheter, 90 patients (82%), arterial catheter, 83patients (75.5%), urinary catheter, 86 patients (78%), and mechanical ventilation, 75 patients (68%). In 84 patients, 128 infections were diagnosed. in 53 cases (48%). Multiresistant Pseudomonas aeruginosa and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Burns; Mortality; Children.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000200144

Infection of the lymphatic system by Aureobasidium pullulans in a patient with erythema nodosum leprosum
Provedor de dados: 55
Autores: Morais,Orlando Oliveira de; Porto,Cláudia; Coutinho,Anglya Samara Silva Leite; Reis,Carmélia Matos Santiago; Teixeira,Marcus de Melo; Gomes,Ciro Martins.
Aureobasidium pullulans is a causal agent of phaeohyphomycosis, occasionally found in men and animals. As an agent of different opportunistic fungal processes, it may cause fungemia, systemic infections and abscesses in different viscera. This paper aims to report a case of a patient with infection of the lymphatic system by A. pullulans. A 23-year-old patient being treated for erythema nodosum leprosum presented a 60-day complaint of daily fever, hoarseness, odynophagia and weight loss. Laboratory tests showed pancytopenia with severe neutropenia, cervical adenomegaly and solid contrast uptake lesion in the oropharyngeal region. Due to neutropenia and sepsis the patient was initially treated with cefepime and vancomycin, but there was no clinical...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: HIV; Pneumonia; Macrolides; Mortality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702011000300019

The effectiveness of a bundle in the prevention of ventilator-associated pneumonia
Provedor de dados: 55
Autores: Ferreira,Cléria Rodrigues; de Souza,Denis Fabiano; Cunha,Thulio Marques; Tavares,Marcelo; Reis,Samir Seme Arab; Pedroso,Reginaldo Santos; Röder,Denise Von Dolinger de Brito.
Abstract  Objectives The aim of this study was to evaluate the impact of a bundle called FAST HUG in ventilator-associated pneumonia, weigh the healthcare costs of ventilator-associated pneumonia patients in the intensive care unit, and hospital mortality due to ventilator-associated pneumonia.  Material and methods The study was performed in a private hospital that has an 8-bed intensive care unit. It was divided into two phases: before implementing FAST HUG, from August 2011 to August 2012 and after the implementation of FAST HUG, from September 2012 to December 2013. An individual form for each patient in the study was filled out by using information taken electronically from the hospital medical records. The following data was obtained from each...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ventilator-associated pneumonia; Checklist; Cost; Mortality.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702016000300008

Pediatric mortality due to nosocomial infection: a critical approach
Provedor de dados: 55
Autores: Lopes,Julia Marcia Maluf; Goulart,Eugenio Marcos Andrade; Starling,Carlos Ernesto Ferreira.
Nosocomial infection is a frequent event with potentially lethal consequences. We reviewed the literature on the predictive factors for mortality related to nosocomial infection in pediatric medicine. Electronic searches in English, Spanish and Portuguese of the PubMed/MEDLINE, LILACS and Cochrane Collaboration Databases was performed, focusing on studies that had been published from 1996 to 2006. The key words were: nosocomial infection and mortality and pediatrics/neonate/ newborn/child/infant/adolescent. The risk factors found to be associated with mortality were: nosocomial infection itself, leukemia, lymphopenia, neutropenia, corticosteroid therapy, multiple organ failure, previous antimicrobial therapy, catheter use duration, candidemia, cancer,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nosocomial infection; Mortality; Prognosis; Healthcare quality; Pediatric hospital.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702007000500013

Hyponatremia, acute kidney injury, and mortality in HIV-related toxoplasmic encephalitis
Provedor de dados: 55
Autores: Libório,Alexandre B.; Silva Jr,Geraldo B.; Silva,Carolina G.C.H.; Lima Filho,Francisco J.C.; Studart Neto,Adalberto; Okoba,Willy; Bruin,Veralice M.S. de; Araújo,Sônia M.H.A.; Daher,Elizabeth F.
BACKGROUND: There are no reports on hyponatremia and acute kidney injury (AKI) involved in the course of HIV-related toxoplasmic encephalitis (TE). The main objective of this study was to describe the occurrence of hyponatremia and its relationship with AKI and mortality in HIV-related toxoplasmic encephalitis (TE). METHODS: This was a retrospective cohort study on patients with HIV-related TE. AKI was considered only when the RIFLE (risk, injury, failure, loss, end-stage) criterion was met, after the patient was admitted. RESULTS: A total of 92 patients were included, with a mean age of 36 ± 9 years. Hyponatremia at admission was observed in 43 patients (46.7%), with AKI developing in 25 (27.1%) patients during their hospitalization. Sulfadiazine was the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toxoplasmosis; Encephalitis; Hyponatremia; Acute kidney injury; HIV; Mortality.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702012000600010

Staphylococcus aureus bacteremia: what is the impact of oxacillin resistance on mortality?
Provedor de dados: 55
Autores: Cassettari,V.C.; Strabelli,T.; Medeiros,E.A.S.
In order to analyse the impact of oxacillin resistance on the mortality of Staphylococcus aureus bacteremia, and to assess the antimicrobial susceptibility of community-acquired strains in two large university hospitals (the Instituto do Coração do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo and the Instituto Central do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo), we carried out a four-month-long prospective cohort study, which included 163 consecutive cases of S. aureus bacteremia. Of these, 140 (85.9%) were hospital-acquired, 9 (5.5%) were community-acquired and 14 (8.6%) were of indeterminate origin. No cases of community-acquired infection by oxacillin-resistant S. aureus was identified....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Staphylococcus aureus; Bacteremia; Mortality.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702005000100012

Staphylococcus aureus bacteremia: comparison of two periods and a predictive model of mortality
Provedor de dados: 55
Autores: Conterno,Lucieni de Oliveira; Wey,Sérgio Barsanti; Castelo,Adauto.
Staphylococcus aureus is an important pathogen causing bacteremia, primarily affecting hospitalized patients. We studied the epidemiology of S. aureus bacteremia, comparing two periods (early and mid 1990s) and developed a predictive model of mortality. A nested case-control was done. All 251 patients over 14 years old with positive blood cultures for S. aureus were selected. MRSA (methicillin resistant S. aureus) was isolated in 63% of the cases. When comparing the two periods MRSA community-acquired bacteremia increased from 4% to 16% (p=0.01). There was no significant difference in the mortality rate between the two periods (39% and 33%, p=0.40). Intravascular catheters provoked 24% of the cases of bacteremia and were associated with the lowest rate of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Staphylococcus aureus; Bacteremia; Mortality.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702002000600004

Strategies to reduce mortality and morbidity due to AIDS-related cryptococcal meningitis in Latin America
Provedor de dados: 55
Autores: Vidal,Jose E.; Oliveira,Augusto C. Penalva de; Dauar,Rafi F.; Boulware,David R.
Latin America is the region with the third most AIDS-related cryptococcal meningitis infections globally. Highly active antiretroviral therapy (HAART) has reduced the number of infections; however, the number of deaths and the case-fatality rate continues to be unacceptable. In this review, we focus on the burden of AIDS-related cryptococcosis in Latin America and discuss potential strategies to reduce early mortality from Cryptococcus. In this review, we highlight the importance of: (1) earlier HIV diagnosis and HAART initiation with retention-in-care to avoid AIDS; (2) pre-HAART cryptococcal antigen (CRAG) screening with preemptive fluconazole treatment; (3) better diagnostics (e.g. CRAG testing); and (4) optimal treatment with aggressive management of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cryptococcal meningitis; Cryptococccosis; Epidemiology; Diagnosis; Treatment; Mortality; Latin America.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702013000300008

Predictors of 7- and 30-day mortality in pediatric intensive care unit patients with cancer and hematologic malignancy infected with Gram-negative bacteria
Provedor de dados: 55
Autores: Costa,Patrícia de Oliveira; Atta,Elias Hallack; Silva,André Ricardo Araujo da.
Background:Infection with Gram-negative bacteria is associated with increased morbidity and mortality. The aim of this study was to evaluate the predictors of 7- and 30-day mortality in pediatric patients in an intensive care unit with cancer and/or hematologic diseases and Gram-negative bacteria infection.Methods:Data were collected relating to all episodes of Gram-negative bacteria infection that occurred in a pediatric intensive care unit between January 2009 and December 2012, and these cases were divided into two groups: those who were deceased seven and 30 days after the date of a positive culture and those who survived the same time frames. Variables of interest included age, gender, presence of solid tumor or hematologic disease, cancer status,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cancer; Pediatric intensive care unit; Infection with Gram-negative bacteria; Mortality.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000600591

Mortality rate after open Roux-in-Y gastric bypass: a 10-year follow-up
Provedor de dados: 56
Autores: Bruschi Kelles,S.M.; Diniz,M.F.H.S.; Machado,C.J.; Barreto,S.M.
The prevalence of obesity has increased to epidemic status worldwide. Thousands of morbidly obese individuals undergo bariatric surgery for sustained weight loss; however, mid- and long-term outcomes of this surgery are still uncertain. Our objective was to estimate the 10-year mortality rate, and determine risk factors associated with death in young morbidly obese adults who underwent bariatric surgery. All patients who underwent open Roux-in-Y gastric bypass surgery between 2001 and 2010, covered by an insurance company, were analyzed to determine possible associations between risk factors present at the time of surgery and deaths related and unrelated to the surgery. Among the 4344 patients included in the study, 79% were female with a median age of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Survival analysis; Mortality; Follow-up studies; Morbid obesity; Roux-in-Y gastric bypass; Surgeon expertise.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000700617

Temperature, air pollution, and mortality from myocardial infarction in São Paulo, Brazil
Provedor de dados: 56
Autores: Sharovsky,R.; César,L.A.M.; Ramires,J.A.F.
An increase in daily mortality from myocardial infarction has been observed in association with meteorological factors and air pollution in several cities in the world, mainly in the northern hemisphere. The objective of the present study was to analyze the independent effects of environmental variables on daily counts of death from myocardial infarction in a subtropical region in South America. We used the robust Poisson regression to investigate associations between weather (temperature, humidity and barometric pressure), air pollution (sulfur dioxide, carbon monoxide, and inhalable particulate), and the daily death counts attributed to myocardial infarction in the city of São Paulo in Brazil, where 12,007 fatal events were observed from 1996 to 1998....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Epidemiology; Myocardial infarction; Mortality; Temperature; Atmospheric pressure; Air pollution.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004001100009

Association between elevated adiponectin level and adverse outcomes in patients with heart failure: a systematic review and meta-analysis
Provedor de dados: 56
Autores: Bai,Wenwei; Huang,Jingjing; Zhu,Min; Liu,Xiaoyong; Tao,Jianping.
Studies regarding the prognostic value of circulating adiponectin level in patients with heart failure are conflicting. The aim of this meta-analysis was to evaluate the association between elevated circulating adiponectin level and adverse outcomes in patients with heart failure. We searched PubMed and Embase databases from their inception to June 2018. Original observational studies that investigated the prognostic value of adiponectin in heart failure patients and reported all-cause mortality or combined endpoints of death/readmission as outcome measure were included. Pooled risk ratio (RR) with 95% confidence intervals (CI) were estimated by higher versus lower circulating adiponectin level. A total of 7 studies involving 862 heart failure patients...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adiponectin; Heart failure; Mortality; Readmission; Meta-analysis.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000700610

C-reactive protein in acute coronary syndrome: association with 3-year outcomes
Provedor de dados: 56
Autores: Schaan,B.D.; Pellanda,L.C.; Maciel,P.T.; Duarte,E.R.; Portal,V.L.
Inflammatory markers have been associated with clinical outcome in patients with acute coronary syndrome (ACS). The present study evaluated the role of high-sensitivity C-reactive protein (CRP) measurements as a predictor of late cardiovascular outcomes after ACS. One hundred and ninety-nine ACS patients in a Coronary Care Unit from March to November 2002 were included and were reassessed clinically after ~3 years. Clinical variables and CRP levels were evaluated as predictors of major cardiovascular events (MACE, defined as the occurrence of cardiac death, ischemic stroke or myocardial infarction) and mortality. Statistical analyses included Cox multivariable analysis and survival curves (Kaplan-Meier). Of the 199 patients, 11 died within 1 month (5.5%)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acute coronary syndromes; Inflammatory markers; C-reactive protein; Major cardiovascular events; Mortality.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009001200019

Association of sulfur dioxide exposure with circulatory system deaths in a medium-sized city in Brazil
Provedor de dados: 56
Autores: Amancio,C.T.; Nascimento,L.F.C.
There is a demonstrable association between exposure to air pollutants and deaths due to cardiovascular diseases. The objective of this study was to estimate the effects of exposure to sulfur dioxide on mortality due to circulatory diseases in individuals 50 years of age or older residing in São José dos Campos, SP. This was a time-series ecological study for the years 2003 to 2007 using information on deaths due to circulatory disease obtained from Datasus reports. Data on daily levels of pollutants, particulate matter, sulfur dioxide (SO2), ozone, temperature, and humidity were obtained from the São Paulo State Environmental Agency. Moving average models for 2 to 7 days were calculated by Poisson regression using the R software. Exposure to SO2 was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Air pollution; Sulfur dioxide; Cardiovascular diseases; Mortality; Air pollutants; Stroke.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001100013

Cyst infection in hospital-admitted autosomal dominant polycystic kidney disease patients is predominantly multifocal and associated with kidney and liver volume
Provedor de dados: 56
Autores: Balbo,B.E.P.; Sapienza,M.T.; Ono,C.R.; Jayanthi,S.K.; Dettoni,J.B.; Castro,I.; Onuchic,L.F.
Positron-emission tomography/computed tomography (PET/CT) has improved cyst infection (CI) management in autosomal dominant polycystic kidney disease (ADPKD). The determinants of kidney and/or liver involvement, however, remain uncertain. In this study, we evaluated clinical and imaging factors associated with CI in kidney (KCI) and liver (LCI) in ADPKD. A retrospective cohort study was performed in hospital-admitted ADPKD patients with suspected CI. Clinical, imaging and surgical data were analyzed. Features of infected cysts were evaluated by PET/CT. Total kidney (TKV) and liver (TLV) volumes were measured by CT-derived multiplanar reconstruction. CI was detected in 18 patients who experienced 24 episodes during an interval of 30 months (LCI in 12, KCI...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Autosomal dominant polycystic kidney disease; Cyst infection; Positron-emission tomography/computed tomography; Kidney volume; Liver volume; Mortality.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000700584

Effects of prenatal exposure to a mild chronic variable stress on body weight, preweaning mortality and rat behavior
Provedor de dados: 56
Autores: Cabrera,R.J.; Rodríguez-Echandía,E.L.; Jatuff,A.S.G.; Fóscolo,M.
Early stimulation has been shown to produce long-lasting effects in many species. Prenatal exposure to some strong stressors may affect development of the nervous system leading to behavioral impairment in adult life. The purpose of the present work was to study the postnatal harmful effects of exposure to variable mild stresses in rats during pregnancy. Female Holtzman rats were submitted daily to one session of a chronic variable stress (CVS) during pregnancy (prenatal stress; PS group). Control pregnant rats (C group) were undisturbed. The pups of PS and C dams were weighed and separated into two groups 48 h after delivery. One group was maintained with their own dams (PS group, N = 70; C group, N = 36) while the other PS pups were cross-fostered with C...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Prenatal stress; Chronic stress; Body weight; Behavior; Mortality; Rat.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1999001000009

Application of a modified sequential organ failure assessment score to critically ill patients
Provedor de dados: 56
Autores: Ñamendys-Silva,S.A.; Silva-Medina,M.A.; Vásquez-Barahona,G.M.; Baltazar-Torres,J.A.; Rivero-Sigarroa,E.; Fonseca-Lazcano,J.A.; Domínguez-Cherit,G.
The purpose of the present study was to explore the usefulness of the Mexican sequential organ failure assessment (MEXSOFA) score for assessing the risk of mortality for critically ill patients in the ICU. A total of 232 consecutive patients admitted to an ICU were included in the study. The MEXSOFA was calculated using the original SOFA scoring system with two modifications: the PaO2/FiO2 ratio was replaced with the SpO2/FiO2 ratio, and the evaluation of neurologic dysfunction was excluded. The ICU mortality rate was 20.2%. Patients with an initial MEXSOFA score of 9 points or less calculated during the first 24 h after admission to the ICU had a mortality rate of 14.8%, while those with an initial MEXSOFA score of 10 points or more had a mortality rate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sequential organ failure assessment score; Organ dysfunction; Critically ill patients; Mortality; Intensive care unit survival; MEXSOFA.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2013000200186

Elevated levels of plasma osteoprotegerin are associated with all-cause mortality risk and atherosclerosis in patients with stages 3 to 5 chronic kidney disease
Provedor de dados: 56
Autores: Nascimento,M.M.; Hayashi,S.Y.; Riella,M.C.; Lindholm,B.
Osteoprotegerin (OPG) regulates bone mass by inhibiting osteoclast differentiation and activation, and plays a role in vascular calcification. We evaluated the relationship between osteoprotegerin levels and inflammatory markers, atherosclerosis, and mortality in patients with stages 3-5 chronic kidney disease. A total of 145 subjects (median age 61 years, 61% men; 36 patients on hemodialysis, 55 patients on peritoneal dialysis, and 54 patients with stages 3-5 chronic kidney disease) were studied. Clinical characteristics, markers of mineral metabolism (including fibroblast growth factor-23 [FGF-23]) and inflammation (high-sensitivity C-reactive protein [hsCRP] and interleukin-6 [IL-6]), and the intima-media thickness (IMT) in the common carotid arteries...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Atherosclerosis; Chronic kidney disease; Inflammation; Mortality; Osteoprotegerin.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014001100995

Acute kidney injury in AIDS: frequency, RIFLE classification and outcome
Provedor de dados: 56
Autores: Libório,A.B.; Mota,R.M.S.; Abreu,K.L.S.; Silva,A.E.B.; Araújo,S.M.H.A.; Daher,E.F.
The objective of the present study was to evaluate the characteristics of acute kidney injury (AKI) in AIDS patients and the value of RIFLE classification for predicting outcome. The study was conducted on AIDS patients admitted to an infectious diseases hospital inBrazil. The patients with AKI were classified according to the RIFLE classification: R (risk), I (injury), F (failure), L (loss), and E (end-stage renal disease). Univariate and multivariate analyses were used to evaluate the factors associated with AKI. A total of 532 patients with a mean age of 35 ± 8.5 years were included in this study. AKI was observed in 37% of the cases. Patients were classified as "R" (18%), "I" (7.7%) and "F" (11%). Independent risk factors for AKI were thrombocytopenia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acute kidney injury; HIV; AIDS; Prognosis; Mortality; RIFLE.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010001100013

Incidence, risk factors and prognostic factors of acute renal failure in patients admitted to an intensive care unit
Provedor de dados: 56
Autores: Mataloun,S.E.; Machado,F.R.; Senna,A.P.R.; Guimarães,H.P.; Amaral,J.L.G.
The objective of the present study was to assess the incidence, risk factors and outcome of patients who develop acute renal failure (ARF) in intensive care units. In this prospective observational study, 221 patients with a 48-h minimum stay, 18-year-old minimum age and absence of overt acute or chronic renal failure were included. Exclusion criteria were organ donors and renal transplantation patients. ARF was defined as a creatinine level above 1.5 mg/dL. Statistics were performed using Pearsons' chi2 test, Student t-test, and Wilcoxon test. Multivariate analysis was run using all variables with P &lt; 0.1 in the univariate analysis. ARF developed in 19.0% of the patients, with 76.19% resulting in death. Main risk factors (univariate analysis) were:...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acute renal failure; Risk factors; Prognostic factors; Intensive care unit; Mortality.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006001000010

The effect of performing corrections on reported uterine cancer mortality data in the city of São Paulo
Provedor de dados: 56
Autores: Antunes,J.L.F.; Wünsch-Filho,V.
Reports of uterine cancer deaths that do not specify the subsite of the tumor threaten the quality of the epidemiologic appraisal of corpus and cervix uteri cancer mortality. The present study assessed the impact of correcting the estimated corpus and cervix uteri cancer mortality in the city of São Paulo, Brazil. The epidemiologic assessment of death rates comprised the estimation of magnitudes, trends (1980-2003), and area-level distribution based on three strategies: i) using uncorrected death certificate information; ii) correcting estimates of corpus and cervix uteri mortality by fully reallocating unspecified deaths to either one of these categories, and iii) partially correcting specified estimates by maintaining as unspecified a fraction of deaths...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Uterine cancer; Cervical cancer; Mortality; Statistical models; Socioeconomic factors; São Paulo.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000800012

Enzymatic comparison and mortality of Beauveria bassiana against cabbage caterpillar Pieris brassicae LINN
Provedor de dados: 58
Autores: Dhawan,Manish; Joshi,Neelam.
Abstract Beauveria bassiana, an entomopathogenic fungus, is the alternative biocontrol agent exploited against major economic crop pests. Pieris brassicae L. is an emerging pest of the Brassicaceae family. Therefore, in the present study, fungal isolates of Beauveria bassiana, viz. MTCC 2028, MTCC 4495, MTCC 6291, and NBAII-11, were evaluated for their virulence against third instar larvae of P. brassicae. Among all these fungal isolates, maximum mortality (86.66%) was recorded in B. bassiana MTCC 4495 at higher concentration of spores (109 conidia/ml), and the minimum mortality (30.00%) was recorded in B. bassiana MTCC 6291 at a lower concentration (107 conidia/ml) after ten days of treatment. The extracellular cuticle-degrading enzyme activities of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chitinase; Entomopathogenic fungi; Lipase; Mortality; Protease.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000300522

Microbial control of the invasive spiraling whitefly on cassava with entomopathogenic fungi
Provedor de dados: 58
Autores: Boopathi,Thangavel; Karuppuchamy,Palaniappan; Singh,Soibam B.; Kalyanasundaram,Manickavasagam; Mohankumar,S.; Ravi,Madhaiyan.
Abstract The entomopathogenic fungi Beauveria bassiana, Metarhizium anisopliae, Lecanicillium lecanii and Isaria fumosorosea were tested for their efficacy in managing the exotic spiraling whitefly Aleurodicus dispersus (Hemiptera, Aleyrodidae) on cassava (Manihot esculenta) during 2 seasons (2011-2012 and 2012-2013). The fungi I. fumosorosea and L. lecanii exhibited promising levels of control (&gt; 70% mortality of the A. dispersus population). The percent mortality increased over time in both seasons. Application of I. fumosorosea was highly pathogenic to A. dispersus in both seasons compared to the other entomopathogenic fungi. Analysis of the percent mortality in both seasons revealed differences in efficacy between 3 and 15 days after treatment. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aleurodicus dispersus; Manihot esculenta; Biocontrol; Entomopathogenic fungi; Mortality.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401077

Toxicity of Field-Aged Permethrin-Loaded Attracticides on Choristoneura rosaceana (HARRIS) and Pandemis pyrusana Kearfott (Lepidoptera: Tortricidae) Adult Males and Females
Provedor de dados: 117
Autores: Curkovic,Tomislav; Brunner,Jay F; J. Brown,John.
Lethal and sub lethal effects were evaluated in the laboratory on Choristoneura rosaceana (Harris) and Pandemis pyrusana Kearfott males exposed to an attracticide loaded with permethrin and aged in the field. The effect of pairing conspecific females with previously intoxicated males was also evaluated. In both species a significantly greater mortality of male moths (&amp;#8805; 95%) was observed 24 h after exposure to t he attracticide formulation. Likewise, high levels of knock down (&amp;#8805; 75%) were observed in males of both species 1 h after attracticide exposure. In females, knock down was &amp;#8805; 2.5% and mortality &amp;#8805; 3.3% after pairing with intoxicated males. Leg autotomy in males was at least 73% in C. rosaceana and &amp;#8805;...
Tipo: Journal article
Palavras-chave: Bioassay; Fecundity; Fertility; Knockdown; Leg autotomy; Lethal effects; Mortality; Sub lethal effects.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100003

Low water hardness and pH affect growth and survival of silver catfish juveniles
Provedor de dados: 65
Autores: Copatti,Carlos Eduardo; Garcia,Luciano de Oliveira; Kochhann,Daiani; Cunha,Mauro Alves da; Becker,Alexssandro Geferson; Baldisserotto,Bernardo.
The objective of this study was to investigate the effects of exposure to low water hardness (0, 25 and 50mg CaCO3L-1) into the 6.0-8.0 pH range to silver catfish juveniles (Rhamdia quelen) survival and growth after 32 days. Juveniles kept at zero water hardness presented higher mortality at pH 7.0 and 8.0 than those submitted to other treatments. Weight of juveniles exposed to pH 6.0 and zero water hardness was significantly higher than those kept at the same water hardness and other pH. Survival and growth of juveniles exposed to 25 and 50mg CaCO3 L-1 was not affected in the 6.0-8.0 pH range. Therefore, the best water hardness for silver catfish juveniles growth is 25-50mg CaCO3 L-1 and at low water hardness (next zero) pH must be reduced.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acidic water; Alkaline water; Calcium; Growth; Mortality; Rhamdia quelen.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011000800030

White muscle disease in three selenium deficient beef and dairy calves in Argentina and Uruguay
Provedor de dados: 65
Autores: Rodriguez,Alejandro Martín; Schild,Carlos Omar; Cantón,Germán José; Riet-Correa,Franklin; Armendano,Joaquín Ignacio; Caffarena,Rubén Darío; Brambilla,Emilio César; García,Juan Agustín; Morrell,Eleonora Lidia; Poppenga,Robert; Giannitti,Federico.
ABSTRACT: White muscle disease (WMD), nutritional myodegeneration or enzootic muscular dystrophy, is a nutritional condition associated with selenium and/or vitamin E deficiency in ruminants. These elements are constituents of the major body antioxidant systems. Depletion of selenium results in oxidative damage to cardiac and skeletal muscle cells, resulting in myodegeneration and myonecrosis, typical lesions of WMD. Selenium deficiency is common in South America, but WMD is underreported. This research describes clinical, biochemical and pathological findings in two episodes of WMD associated with selenium deficiency in beef and dairy calves in Argentina and Uruguay with concurrent copper deficiency in one of them, which resulted in spontaneous calf...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mortality; Cardiac failure; Mineral deficiencies; Nutritional myopathy; South America.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000500550

Effects of Curcuma longa extracts on mortality and fecundity of Bactrocera zonata (Diptera: Tephritidae)
Provedor de dados: 64
Autores: Siddiqi,Abdul Rauf; Rafi,Athar; Naz,Falak; Masih,Rafique; Ahmad,Iftikhar; Jilani,Ghulam.
The peach fruit fly, Bactrocera zonata, is a significant pest of fruit and vegetable crops in South East Asia and Pacific region. Ccontrol strategies of fruit flies, relying chiefly on insecticides, have serious environmental consequences, disturbing the agro-ecosystem as well as eliminating natural enemies. This study was oriented at exploring the potential of turmeric, Curcuma longa, extracts to control the peach fruit fly. Freshly emerged female adults of Bactrocera zonata were continuously fed for 16 days on diet containing 1000, 500 and 250 ppm of acetone extract of Curcuma longa separately in laboratory cages. The extract caused 85.00, 66.67 and 56.67 percent mortality at 1000, 500 and 250 ppm respectively. The surviving females were mated and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Turmeric; Peach fruit fly; Bactrocera zonata; Solvent extracts; Mortality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600010