Consulta: subjectFacets:"Populations"
Registros recuperados: 33
Data/hora: 01/06/2024 02:16:17

Control químico en mango (Mangifera indica L.) contra escama blanca y trips en Tierra Blanca, Veracruz, México.
Provedor de dados: 32
Autores: García Escamilla, Paul.
El estudio se realizó de enero a mayo del 2011 en la huerta comercial de mango (Mangifera indica) var. Manila “El Pantano” en Tierra Blanca, Veracruz, México. Se evaluaron aceite mineral, azufre, spinosad e imidacloprid para controlar escama blanca (A. tubercularis) y trips (F. invasor y F. cephalica), que son las principales plagas que atacan a este cultivo. Se llevaron a cabo muestreos periódicos para estimar las poblaciones de las plagas a combatir. Los resultados obtenidos se analizaron con el programa SAS para comparar medias con la prueba de medias de LSD (diferencia mínima significativa) y la prueba de Friedman con un valor de alfa de 0.05%. El aceite mineral, el azufre y el spinosad fueron más eficientes para el control de escama blanca. No se...
Palavras-chave: Escama blanca; Floración; Insecticidas; Poblaciones; Trips; Umbral de acción; White scale; Flowering; Insecticides; Populations; Thrips; Action threshold; Entomología y Acarología; Maestría.
Ano: 2012
URL: http://hdl.handle.net/10521/1734

Algunos aspectos genéticos y bioquímicos de las atocianinas en poblaciones criollas de maíz de granos pigmentados
Provedor de dados: 32
Autores: Espinosa Trujillo, Edgar.
La variabilidad del color de grano en 114 poblaciones criollas de maíz se clasificó  en seis grupos, en el ciclo agrícola PV-2003. Se seleccionaron seis poblaciones, una  del blanco, una del amarillo, una del rojo (rojo-2), dos del azul (azul-1 y azul-2) y  una del púrpura (rojo-1), para establecer un sistema de cruzas dialélicas en el  ciclo agrícola PV-2004. En la F1 semilla de las cruzas hubo diferencias entre  progenitores, en la cantidad de antocianinas y su distribución en el pericarpio y  en la capa de aleurona. Los efectos aditivos (ACG) y maternos (EM) fueron  sobresalientes para el grosor del pericarpio y de la aleurona, para la  concentración de antocianinas en las mismas estructuras y para su concentración  por unidad de peso de grano (CAkg)....
Palavras-chave: Antocianinas; Pigmentos; Aptitud combinatoria; Maíz criollo; Heterosis anthocyanins; Natural pigments; Combining ability; Native maize; Populations; Heterosis.
Ano: 2012
URL: http://hdl.handle.net/10521/788

Evaluación agronómica e interacción genotipo-ambiente en poblaciones de maíz de la raza Jala.
Provedor de dados: 32
Autores: López Guzmán, Jesús Asunción.
La raza Jala de maíz (Zea mays L.) es una de las más importantes de México. Ésta ha sido cultivada durante siglos en el Valle de Jala, Nayarit, y su mazorca se reconoce mundialmente como la de mayor tamaño; no obstante, esta raza ha sufrido “erosión genética” grave que le ha provocado una reducción en longitud de mazorca y producción de grano. Para contribuir a su conservación y mejoramiento genético, en este trabajo se estudiaron su potencial productivo (RGp) y atributos agronómicos, en especial la longitud de mazorca (LMZ). Por otro lado, los productores citan con frecuencia la confianza que tienen en los maíces criollos por ser opciones resistentes y predecibles en su comportamiento agronómico, en comparación con las variedades “modernas” producto del...
Palavras-chave: Zea mays L.; Interacción genotipo por ambiente; Poblaciones; Raza Jala; Rendimiento; Longitud de mazorca; Biplot; Genotype x environment interaction; Populations; Jala race; Grain yield; Ear length; Genética; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2194

Algunos aspectos genéticos y bioquímicos de las atocianinas en poblaciones criollas de maíz de granos pigmentados
Provedor de dados: 32
Autores: Espinosa Trujillo, Edgar.
La variabilidad del color de grano en 114 poblaciones criollas de maíz se clasificó en seis grupos, en el ciclo agrícola PV-2003. Se seleccionaron seis poblaciones, una del blanco, una del amarillo, una del rojo (rojo-2), dos del azul (azul-1 y azul-2) y una del púrpura (rojo-1), para establecer un sistema de cruzas dialélicas en el ciclo agrícola PV-2004. En la F1 semilla de las cruzas hubo diferencias entre progenitores, en la cantidad de antocianinas y su distribución en el pericarpio y en la capa de aleurona. Los efectos aditivos (ACG) y maternos (EM) fueron sobresalientes para el grosor del pericarpio y de la aleurona, para la concentración de antocianinas en las mismas estructuras y para su concentración por unidad de peso de grano (CAkg). Por sus...
Tipo: Tesis
Palavras-chave: Antocianinas; Pigmentos; Aptitud combinatoria; Maíz criollo; Heterosis; Anthocyanins; Natural pigments; Combining ability; Native maize; Populations; Heterosis.
Ano: 2008
URL: http://hdl.handle.net/10521/1171

Algunos aspectos genéticos y bioquímicos de las atocianinas en poblaciones criollas de maíz de granos pigmentados
Provedor de dados: 32
Autores: Espinosa Trujillo, Edgar.
La variabilidad del color de grano en 114 poblaciones criollas de maíz se clasificó  en seis grupos, en el ciclo agrícola PV-2003. Se seleccionaron seis poblaciones, una  del blanco, una del amarillo, una del rojo (rojo-2), dos del azul (azul-1 y azul-2) y  una del púrpura (rojo-1), para establecer un sistema de cruzas dialélicas en el  ciclo agrícola PV-2004. En la F1 semilla de las cruzas hubo diferencias entre  progenitores, en la cantidad de antocianinas y su distribución en el pericarpio y  en la capa de aleurona. Los efectos aditivos (ACG) y maternos (EM) fueron  sobresalientes para el grosor del pericarpio y de la aleurona, para la  concentración de antocianinas en las mismas estructuras y para su concentración  por unidad de peso de grano (CAkg)....
Palavras-chave: Antocianinas; Pigmentos; Aptitud combinatoria; Maíz criollo; Heterosis anthocyanins; Natural pigments; Combining ability; Native maize; Populations; Heterosis.
Ano: 2012
URL: http://hdl.handle.net/10521/880

Estimación poblacional y lesiones morfo-histológicas de Steneotarsonemus spinki (Acari: Tarsonemidae) en arroz var. Morelos A-92.
Provedor de dados: 32
Autores: Jaimez Ruíz, Isis Anmerany.
El ácaro Steneotarsonemus spinki Smiley es una plaga del arroz, cultivo alimenticio de relevancia mundial. Se ha diseminado en diversas partes del mundo causando daños importantes.  Se inocularon plantas de arroz  var. Morelos A-92 con este ácaro con la finalidad de comprender mejor las lesiones que ocasiona para lo cual se evaluaron sus tasas poblaciones a lo largo del tiempo en diferentes fases del cultivo y se determinó el nivel de lesión morfológica e histológica causada por el ácaro. Se observó un máximo de población 13 semanas después de ser inoculadas las plantas, con 58.5 individuos/planta promedio, y mayor cantidad de hembras adultas a lo largo del ensayo. La lesión morfológica observada en las plantas de arroz se categorizó mediante una escala de...
Palavras-chave: Oryza sativa; Ácaro del vaneo; Poblaciones; Lesiones morfológicas; Lesiones histológicas; Rice mite; Populations; Histological injuries; Morphological injures; Entomología y Acarología; Maestría.
Ano: 2014
URL: http://hdl.handle.net/10521/2242

Mammalian Herbivores in the Boreal Forests: Their Numerical Fluctuations and Use by Man
Provedor de dados: 7
Autores: Danell, Kjell; Swedish University of Agricultural Sciences; kjell.danell@szooek.slu.se; Willebrand, Tomas; Swedish University of Agricultural Sciences; tomas.willebrand@szooek.slu.se; Baskin, Leonid; Institute of Ecology and Evolution, Russian Academy of Sciences; leonidBaskin@glasnet.ru.
Within the boreal zone, there are about 50 native mammalian herbivore species that belong to the orders Artiodactyla, Rodentia, and Lagomorpha. Of these species, 31 occur in the Nearctic and 24  in the Palaearctic. Only six species occur in both regions. Species of the family Cervidae have probably been, and still are, the most important group for man, as they provide both meat and hides. Pelts from squirrels, muskrats, and hares were commercially harvested at the beginning of the century, but have less value today. The semi-domestic reindeer in the Palaearctic produces meat and hides on a commercial basis. It is also used for milking, to a limited extent, as is the semi-domestic moose in Russia. The Siberian musk deer is used for its musk and is raised in...
Tipo: Peer-Reviewed Reports
Palavras-chave: Boreal forests; Conservation; Fluctuations; Herbivores; Human use; Mammals; Management; Populations; Variability.
Ano: 1998

Life history variation and demography of the invasive plant Eschscholzia californica Cham. (Papaveraceae), in two altitudinal extremes, Central Chile
Provedor de dados: 73
Autores: Peña-Gómez,Francisco T; Bustamante,Ramiro O.
In this study, we compared demographic responses of Eschscholzia californica populations located at different altitude, under the basic assumption that altitudinal gradients impose environmental limitation to the spread at the upper edge of the gradient. We detected significant differences among populations either in terms of life history attributes and the finite rate of increase. In general, coastal population expressed higher finite population rates than mountain populations, although these differences were not statistically significant. Mountain populations (Corral Quemado and Farellones) expressed a finite population rate not significant different of 1. These result suggest that at the upper front of invasion the species is in a demographic...
Tipo: Journal article
Palavras-chave: Populations; Invasions; Heterogeneity; Demographic matrix.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432012000100011

Развитие исследований зообентоса северо-западной части Черного моря за полувековой период (1950 - 2000 гг.)
Provedor de dados: 13
Autores: Воробьева, Л. В.; Синегуб, И. А.; Шурова, Н. М.
Дан обзор исследований донных беспозвоночных северо-западной части Черного моря за полувековой период (1950 – 2000 гг.). Показано влияние эвтрофирования на формирование видового богатства зообентоса, структуру донных биоценозов и деградацию некоторых из них в зонах повторяющихся крупномасштабных заморов. На основании нового метода определения индивидуального возраста мидий проанализированы такие популяционные характеристики, как показатели роста моллюсков, уровни их смертности и выживаемости. Более 25 лет успешно проводится изучение мейобентоса контактных зон моря.
Tipo: Journal Contribution
Palavras-chave: Северо-западная часть Черного моря; Зообентос; Биологическое разнообразие; Эвтрофирование; Популяции; Eutrophycation; Populations; Zoobenthos; Biodiversity Zoobenthos Biodiversity Zoobenthos Biodiversity http://aims.fao.org/aos/agrovoc/c_15487 http://aims.fao.org/aos/agrovoc/c_33949.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/480

Morphometric differences in two calanoid sibling species, Boeckella gracilipes and B. titicacae (Crustacea, Copepoda)
Provedor de dados: 76
Autores: Escalante,Patricio De los Ríos.
Calanoid copepods are abundant in South American inland waters and include widespread species, such as Boeckella gracilipes (Daday, 1902), which occurs from the Ecuador to Tierra del Fuego Island. This species occurs under various environmental conditions, and is found in oligotrophic lakes in Patagonia (39-54°S) and in shallow mountain lakes north of 39°S. The aim of the present study is to conduct a morphometric comparison of male specimens of B. titicacae collected in Titicaca and B. gracilipes collected in Riñihue lakes, with a third population of B. gracilipes collected in shallow ponds in Salar de Surire. Titicaca and Riñihue lakes are stable environments, whereas Salar de Surire is an extreme environment. These ponds present an extreme environment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Boeckella; Fifth thoracopods; Morphology; Populations.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000400013

Introducao e avaliacao de cultivares e populacoes de cenoura: caracteristicas agronomicas e indicadores de qualidade de raiz.
Provedor de dados: 14
Autores: RITSCHEL, P. S.; MOITA, A. W.; VIEIRA, J. V.
bitstream/item/109226/1/Introducao-e-avaliacao-de-cultivares-e-populacoes-de-cenoura.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Cultivar; Brasilia; Distrito Federal; Brasil; Carrot; Variety; Populations; Root; Quality.; Cerrado; Cenoura; Daucus Carota; População; Raiz.; Qualidade; Brazil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/764706

Grands invertébrés et poissons observés par les campagnes scientifiques. Atlas de distribution. Bilan 2008
Provedor de dados: 5
Autores: Trenkel, Verena; Berthele, Olivier; Lorance, Pascal; Bertrand, Jacques; Brind'Amour, Anik; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Mahe, Jean-claude; Morin, Jocelyne; Rochet, Marie-joelle; Salaun, Michele; Souplet, Arnauld; Verin, Yves.
Depuis une vingtaine d'années, l'Ifremer organise des campagnes de pêche scientifique en mer du Nord, Manche, Atlantique et Méditerranée concernant les ressources pélagiques, démersales et benthiques. L'objectif prioritaire est de produire des indices d'abondance des principales espèces commerciales. Elles recueillent également des données sur les espèces capturées non commerciales.  Les campagnes sont réalisées selon des plans d'échantillonnage standardisés. L'engin de pêche et son gréement, la position des stations, le tri des captures, les prélèvements biologiques suivent des protocoles fixés. Chaque zone étudiée est découpée en fonction de la profondeur, de la latitude ou d'autres critères. L'échantillonnage prévoit un nombre de traits de chalut...
Tipo: Text
Palavras-chave: Populations; Halieutique; Bulletin; Méditerranée; Golfe de Gascogne; Manche; Mer du Nord; France; Pêche; Campagnes à la mer; Atlas; Survey; Mediterranean Sea; Bay of Biscay; English Channel; North Sea; France; Populations; Fishery science; Bulletin; Atlas.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6976.pdf

Impacts de l’extraction sélective d’espèces sur les populations, les communautés et les réseaux trophiques. Sous-région marine Méditerranée occidentale. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Trenkel, Verena.
Tipo: Text
Palavras-chave: Méditerranée; Extraction sélective; Espèces; Impacts; Populations; Communautés; Réseau trophique.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00331/44251/43820.pdf

Impacts de l’extraction sélective d’espèces sur les populations, les communautés et les réseaux trophiques. Sous-région marine Manche - mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Trenkel, Verena.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Extraction sélective; Espèces; Impacts; Populations; Communautés; Réseau trophique.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00328/43881/43455.pdf

Sensitivity of marine systems to climate and fishing: Concepts, issues and management responses
Provedor de dados: 5
Autores: Perry, R. Ian; Cury, Philippe; Brander, Keith; Jennings, Simon; Moellmann, Christian; Planque, Benjamin.
Modern fisheries research and management must understand and take account of the interactions between climate and fishing, rather than try to disentangle their effects and address each separately. These interactions are significant drivers of change in exploited marine systems and have ramifications for ecosystems and those who depend on the services they provide. We discuss how fishing and climate forcing interact on individual fish, marine populations, marine communities, and ecosystems to bring these levels into states that are more sensitive to (i.e. more strongly related with) climate forcing. Fishing is unlikely to alter the sensitivities of individual finfish and invertebrates to climate forcing. It will remove individuals with specific...
Tipo: Text
Palavras-chave: Climate variability; Climate change; Communities; Ecosystems; Fisheries management; Fishing; Populations.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00000/11141/9343.pdf

Grands invertébrés et poissons observés par les campagnes scientifiques. Bilan 2007
Provedor de dados: 5
Autores: Bertrand, Jacques; Brind'Amour, Anik; Cochard, Marie-laure; Coppin, Franck; Leaute, Jean-pierre; Lorance, Pascal; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Rochet, Marie-joelle; Schlaich, Ivan; Souplet, Arnauld; Trenkel, Verena; Verin, Yves.
The ecosystems exploited by fishing are complex. The species which are sought after and their distribution rely on numerous processes, in time and space. The understanding of marine ecosystems requires important means and diverse information including those of professional fishing and scientific cruises. At first, scientific fishing cruises aimed to explore marine fauna and discover new halieutic resources. They were in line with the exploration cruises carried out by Prince Albert 1st of Monaco at the end of the XIXth century. However, since the beginning of the 1970s, they have been focusing on the quantification of the resources exploited by fishing. [...] After a series of "Understanding keys" aimed at helping the reader understand the methodology and...
Tipo: Text
Palavras-chave: Mediterranean Sea; Bay of Biscay; English Channel; North Sea; France; Communities; Populations; Fishery science; Indicators; Bulletin; Méditerranée; Golfe de Gascogne; Manche; Mer du Nord; France; Pêche; Campagnes à la mer; Communautés; Populations; Halieutique; Indicateurs; Bulletin.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-6160.pdf

Populations nord-atlantiques et méditerranéenne de Bathypterois dubius (Aulopiformes : ipnopidae)
Provedor de dados: 5
Autores: Quero, Jean-claude; Ribes, V.
A northern North Atlantic population of Bathypterois dubius is distinguished and compared to the southern North Atlantic population and the Mediterranean population. B. mediterraneus is a junior synonym of B. dubius. NOT CONTROLLED OCR
Tipo: Text
Palavras-chave: Synonymy; Populations; MED; ANE; B. mediterraneus; Bathypterois dubius; Ipnopidae.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-3796.pdf

Organisation spatiale et modélisation écologique d'un peuplement phytoplanctonique de lagune (étang de Thau, France)
Provedor de dados: 5
Autores: Jarry, V; Frisoni, Gf; Legendre, P.
A systematic sampling of twenty stations was conducted over four periods within a year (June 1986, October 1986, February 1987, and May 1987) in Thau lagoon. Multivariate analyses (clustering, and principal coordinate analysis) were carried out on phytoplankton species counts. These analyses allowed homogenous areas within the lagoon to be identified and permitted the characterization of these areas in terms of the marine or continental origins of their phytoplankton taxa. The results show the relative importance of each kind of input (marine, continental), and contrast the punctual influence of the continental inputs against the more global effects of the sea. The conclusions drawn from the taxonomic portion of the study were confirmed by statistical...
Tipo: Text
Palavras-chave: Phytoplankton; Populations; Chlorophyll pigments; Ecological modelling; Mediterranean lagoon; PHYTOPLANKTON; POPULATIONS; CHLOROPHYLL PIGMENTS; ECOLOGICAL MODELING; MEDITERRANEAN LAGOON.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00323/43397/43105.pdf

Presence of two populations of Norwegian topknot, Phrynorhombus norvegicus (Pleuronectiformes : Scophthalmidae), in western European seas.
Provedor de dados: 5
Autores: Chanet, B; Quetro, Jc; Vayne, Jean-jacques.
Presence of two populations of Norwegian topknot, Phrynorhombus norvegicus (Pleuronectiformes: Scophthalmidae), in western European seas. &lt;br&gt;The Norwegian topknot Phrynorhombus norvegicus (Gunther, 1862) is a little flatfish belonging to the scoplithalmid family. Generally, in the literature, the habitat of this species is mentioned to be rocky bottoms of the north-eastern European seas between 10 to 180 in depth, while few references noticed its presence in the same area and depth on muddy bottoms as well. A study of fisheries data conducted by the trawlers of ISTPM and IFREMER between 1976 to 2001 in Celtic sea and Bay of Biscaye shows that Norwegian Topknot is a rarely caught species with 423 specimens fished in 25 years. Moreover, this analysis...
Tipo: Text
Palavras-chave: Scophthalmidae; Phrynorhombus norvegicus; Western European seas; Populations.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00000/10695/7686.pdf

Mortalités de moules bleues dans les secteurs mytilicoles : description et étude des facteurs liés, action –MORBLEU-2017
Provedor de dados: 5
Autores: Pepin, Jean-francois; Benabdelmouna, Abdellah; Bierne, Nicolas; Costes, Louis; Degremont, Lionel; Garcia, Celine; Guesdon, Stephane; Lamy, Jean-baptiste; Le Moine, Olivier; Morga, Benjamin; Normand, Julien; Robert, Stephane; Saunier, Alice; Soletchnik, Patrick; Travers, Marie-agnes.
Depuis 2014, des épisodes de mortalité anormale affectent les cheptels mytilicoles tant adultes que juvéniles. Dès l’année 2015, une étude spécifique cofinancée par la DPMA et réalisée par l’Ifremer a été initiée, l’action de recherche MORBLEU (Mortalité des moules Bleues). Les années 2015 et 2016 ont permis de dégager des éléments de connaissance et des pistes relatifs aux facteurs biotiques et abiotiques qui semblent intervenir dans le phénomène de hausse de mortalité des moules depuis 2014. Pour l’année 2017, les trois objectifs principaux étaient de : i) poursuivre la description du phénomène de mortalité ainsi que le contexte environnemental associé en effectuant une nouvelle campagne d’études et d’observations in situ, ii) tester des hypothèses...
Tipo: Text
Palavras-chave: Moules; Mytilus edulis; Mortalité; Statut cytogénétique; Anomalies génomiques; Populations; Facteurs environnementaux; Ecologie microbienne.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00503/61503/65337.pdf

Estimation du nombre de tortues vertes femelles adultes Chelonia mydas par saison de ponte à Tromelin et Europa (Océan Indien) (1973-1985)
Provedor de dados: 5
Autores: Le Gall, Jean-yves; Bosc, Pierre; Taquet, Marc.
A research programm on the marine green turtle Chelonia mydas nesting on the two major reproduction sites for the species in the Indian Ocean, conducled over last 15 years, included intensive tagging programm. Processing of these lagging data provides estimations of adult female populations {or each site and season from two independent methods. First classical method is the ratio of total number of nests produced over a define time on the mean individual number of nests by female during the same time (November, December, January). The computed mean individual number ranges from 3 to 3.5 obtained over 2 to 3 months. The second method is the multiple capture-recapture method (JOLLY, 1965; SEBER, 1965; MANLY, 1984). Il is an original tentative of applying...
Tipo: Text
Palavras-chave: Tortue verte; Chelonia mydas; Reproduckion; Ponte; Population; Femelles; Marquage; Recapture; Océan Indien.; Marine green turtle; Chelonia mydas; Capture; Recapture; Indian Ocean; Nesting; Populations; Tagging; Reproduction.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00113/22406/20103.pdf

Mortalités de moules bleues dans les Pertuis Charentais: description et facteurs liés – MORBLEU
Provedor de dados: 5
Autores: Travers, Marie-agnes; Pepin, Jean-francois; Soletchnik, Patrick; Guesdon, Stephane; Le Moine, Olivier.
Depuis 2014, des surmortalités anormales affectent les cheptels mytilicoles tant adultes que juvéniles avec des mortalités massives pouvant atteindre 100% (Béchemin et al. 2015). Les objectifs généraux de ce projet sont d’identifier des facteurs potentiellement corrélés avec les mortalités de moules observées dans les Pertuis Charentais: facteurs environnementaux biotiques, abiotiques et hydrodynamiques) et facteurs intrinsèques aux animaux (traits d'histoire de vie, qualité cytogénétique et physiologie). Après une introduction bibliographique complète, différentes questions sont ici abordées. 1. Historique des mortalités 2014-2015 ? Grâce { différentes sources d’information nous avons pu retracer les évènements de mortalités de 2014 et 2015 et valider...
Tipo: Text
Palavras-chave: Moules; Mytilus edulis; Fluctuations environnementales; Connectivité hydrodynamique; Populations; Qualité cytogénétique; Immunité; Physiologie.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00324/43539/43096.pdf

Impacts de l’extraction sélective d’espèces sur les populations, les communautés et les réseaux trophiques. Sous-région marine Golfe de Gascogne. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Trenkel, Verena.
Tipo: Text
Palavras-chave: Golfe de Gascogne; Extraction sélective; Espèces; Impacts; Populations; Communautés; Réseau trophique.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00329/44068/43639.pdf

Mortalités de moules bleues dans les secteurs mytilicoles charentais et vendéens : description et facteurs liés – MORBLEU
Provedor de dados: 5
Autores: Pepin, Jean-francois; Benabdelmouna, Abdellah; Degremont, Lionel; Guesdon, Stephane; Le Moine, Olivier; Morga, Benjamin; Bierne, Nicolas; Travers, Marie-agnes; Robert, Stephane; Soletchnik, Patrick.
Depuis 2014, des épisodes de mortalité anormale affectent les cheptels mytilicoles tant adultes que juvéniles. Dès l’année 2015, une première année d’étude a été réalisée au travers de l’action MORBLEU (Mortalité des moules Bleues). Elle a été menée dans les Pertuis charentais et la baie de Bourgneuf. Dans ce même contexte, elle a été reconduite en 2016 afin de poursuivre l’analyse des données collectées en 2015, renouveler une campagne d’étude et d’observation in situ, formuler des hypothèses autour de facteurs favorisants ces épisodes de mortalité de moules, développer des essais permettant de tester ces hypothèses dans le futur et produire des lots de moules pour ces essais et pour caractériser le potentiel adaptatif des animaux face aux épisodes de...
Tipo: Text
Palavras-chave: Moules; Mytilus edulis; Facteurs environnementaux; Mortalité; Equilibre microbien; Populations; Qualité cytogénétique; Anomalies hémocytaires; Expression de gènes; Physiologie.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00391/50288/50978.pdf

Bird observations in the Selvagens Islands (21-23 October 1978 and 27 May-7 June 1981) [CANCAP-Project]
Provedor de dados: 16
Autores: Hartog, J.C. den; Norrevang, A.; Zino, P.A.
In the frame work of the CANCAP-Project of the Rijksmuseum van Natuurlijke Historie, Leiden, The Netherlands, the Salvage Islands were visited twice: in 1978 (October 21-23) and 1980 (May 26-June 7), respectively. Bird observations were made on both occassions.
Tipo: Article / Letter to the editor
Palavras-chave: Ornithology; Birds; Breeding birds; Breeding pairs; Vagrant birds; Migrant birds; Roseate Terns; Sterna dougallii; Cory's Shearwater; Calonectris diomedea borealis; Short-eared owl; Asio flammeus; Migrant invations; Populations; Observations; Meteorology; New record; Salvage Islands; Macaronesia; CANCAP-Project.
Ano: 1984
URL: http://www.repository.naturalis.nl/record/658998

Morphological variation among populations of Hemigrammus coeruleus (Characiformes: Characidae) in a Negro River tributary, Brazilian Amazon
Provedor de dados: 83
Autores: Lazzarotto,Henrique; Barros,Thiago; Louvise,José; Caramaschi,Érica Pellegrini.
ABSTRACT We explored patterns of phenotypic variation in Hemigrammus coeruleus from the Unini River basin, a blackwater river in the Brazilian Amazon. Geometric morphometrics was used to evaluate variation in body shape among populations from four tributaries (UN2-UN5). We found no evidence for sexual dimorphism in body size and shape. However, morphological differences among populations were detected as the analyses recovered significant groups corresponding to each sub-basin, with some overlap among them. The populations from UN2, UN3 and UN5 had more elongate bodies than fish from UN4. The most morphologically divergent population belonged to UN4, the tributary with the most divergent environmental conditions and the only one with seasonally-muddy...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Geometric morphometrics; Morphology; Ornamental fish; Phenotypic plasticity; Populations.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100218

Linking estuarine nematodes to their suspected food: a case study from the Westerschelde estuary (south-west Netherlands)
Provedor de dados: 27
Autores: Moens, T.; Van Gansbeke, D.; Vincx, M.
The present study investigates correlations between abundances of nematodes (at the genus level) and benthic microalgae on an intertidal mudflat in the Westerschelde Estuary (south-west Netherlands), using both multi- and univariate methods. Two sample series, covering surface areas of 10 cm(2) (meioscale) and 1.25 cm(2) (microscale) per sample were analysed. Trophic type analysis indicated that an average of 31% of the nematode community were candidate grazers of microalgae. Multivariate data analysis indicated that only a limited part of the variation in the nematode data could be explained in relation to pigments. Total nematodes did not show any correlation with the pigment data. On the meioscale, the genera &lt;i&gt;Tripyloides&lt;/i&gt; and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecology; Marine nematodes; Meiobenthos; Populations; Populations; Scale; Scale; Bacteria.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7332

Relative growth and population dynamics of Macrobrachium iheringi (Decapoda, Palaemonidae)
Provedor de dados: 84
Autores: Nogueira,Caio dos Santos; Perroca,Júlia Fernandes; Piantkoski,Emerson Luiz; Costa,Rogerio Caetano da; Taddei,Fabiano Gazzi; Fransozo,Adilson.
Abstract During the ontogenetic development of crustaceans, the relative growth of some structures may change, especially during the transition from juvenile to adult. This study describes the relative growth of body structures of Macrobrachium iheringi, and provides information on its population dynamics, such as structure, fecundity, and morphological sexual maturity. The sampling of M. iheringi was carried out in “Ribeirão da Hortelã”, in Botucatu (SP, Brazil). The length of the carapace (CL), abdomen (AL), and ischium (IL), merus (ML), carpus (CrL), propodus (PpL), and dactyl (DcL) of the second right pereopod were measured. In addition, the width of the second abdominal pleura (PW) and propodus height (PpH) were included in analyses. The relationships...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Freshwater; Caridea; Populations; Sex-ratio.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100208

Criteria for Decision Making and Economic Threshold Level for Wild Radish in Wheat Crop
Provedor de dados: 87
Autores: TAVARES,L.C.; LEMES,E.S.; RUCHEL,Q.; WESTENDORFF,N.R.; AGOSTINETTO,D.
ABSTRACT: Weed competition limits wheat yield by reducing the availability of essential resources for its growth and development. In this sense, this study aimed to estimate the economic threshold level (ETL) of wild radish (Raphanus raphanistrum) in competition with wheat cultivars. Treatments were arranged in a factorial scheme. The factor wheat cultivar consisted of early (BRS 328), medium (BRS 177), and late (BRS Umbu) cycles and the factor wild radish population ranged from 0 to 564 plants m-2 (10 populations) for the cultivar BRS 328, 0 to 472 plants m-2 for the cultivar BRS 177 (11 populations), and 0 to 724 plants m-2 for the cultivar BRS Umbu (10 populations). The early-cycle BRS 328 presented a higher competitive ability when compared to the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum L.; Raphanus raphanistrum; Cultivars; Populations.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100204

Assessing the genetic structure of Oryza glumaepatula populations with isozyme markers
Provedor de dados: 52
Autores: Veasey,Elizabeth Ann; Cardin,Daruska; Silva,Rainério Meireles; Bressan,Eduardo de Andrade; Vencovsky,Roland.
To assess the genetic diversity and genetic structure parameters, nine populations of Oryza glumaepatula from the Amazon biome, four from the Pantanal biome, and one collected at Rio Xingu, Mato Grosso, totaling 14 populations and 333 individuals were studied with isozyme markers. Six loci were evaluated showing a moderate allozyme variability (A = 1.21, P = 20.7%, Ho = 0.005, He = 0.060). The populations from the Pantanal biome showed higher diversity levels than the Amazon biome. High genetic differentiation among the populations, expected for self-fertilizing species, was observed (F ST=0.763), with lower differentiation found among the Pantanal populations (F ST=0.501). The average apparent outcrossing rate was higher for the Pantanal populations (t a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Genetic diversity; Isozymes; Oryza glumaepatula; Outcrossing rate; Populations.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500001

Genetic variability of three natural populations of Maytenus aquifolium (Celesteraceae) from Telêmaco Borba, Paraná, Brazil
Provedor de dados: 52
Autores: Sahyun,Sandra Aparecida; Ruas,Eduardo Augusto; Ruas,Claudete de Fátima; Medri,Cristiano; Souza,José Roberto Pinto de; Johansson,Loana Aparecida Pereira da Silva; Miranda,Luíz Vicente; Ruas,Paulo Maurício.
Three populations of Maytenus aquifolium from Monte Alegre farm, Telemaco Borba county, Paraná, Brazil were analyzed by RAPD markers. A total of 13 primers were applied wich yielded 283 well amplified markers in all the studied populations (Mortandade, Vila Preta and Trinita), producing different values of gene diversity and polymorphic loci. The analysis of molecular variance (AMOVA) indicated that 21.77% of the genetic variation was among the population. Pairwise F ST analysis showed that the most divergent populations were closer geographically, demonstrating that other factors such as different soil types could explain this variation. Bayesian analysis for K number of clusters and the Principal Coordinate indicated that these three populations were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation; Genetic diversity; Maytenus aquifolium; RAPD; Populations.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000500005

Estimation of population profiles of two strains of the fly Megaselia scalaris (Diptera: Phoridae) by bootstrap simulation
Provedor de dados: 57
Autores: MANZATO,A. J.; TADEI,W. J.; CORDEIRO,J. A.
Based on experimental population profiles of strains of the fly Megaselia scalaris (Phoridae), the minimal number of sample profiles was determined that should be repeated by bootstrap simulation process in order to obtain a confident estimation of the mean population profile and present estimations of the standard error as a precise measure of the simulations made. The original data are from experimental populations founded with SR and R4 strains, with three replicates, which were kept for 33 weeks by serial transfer technique in a constant temperature room (25 ± 1.0°C). The variable used was population size and the model adopted for each profile was a stationary stochastic process. By these simulations, the three experimental population profiles were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bootstrap; Megaselia; Populations; Simulation; Population size.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300006

Insecticidal Efficacy of Azadirachta indica, Nucleopolyhedrovirus and Chlorantraniliprole Singly or Combined against Field Populations fo Helicoverpa armigera Hübner (Lepidoptera: Noctuidae)
Provedor de dados: 117
Autores: Wakil,Waqas; Usman Ghazanfar,M; Nasir,Fozia; Abdul Qayyum,Mirza; Tahir,Muhammad.
The development of resistance in cosmopolitan insect Helicoverpa armigera Hubner (Lepidoptera: Noctuidae) forced the researchers for alternative control measures. In the present study, insecticidal efficacy of formulations of Azadirachta indica, a Nucleopolyhedrovirus (NPV), and new anthranilic diamide insecticide (chlorantraniliprole) formulations was determined against 2nd, through 5th larval instars of H. armigera collected from diverse geographical locations in the Punjab province, Pakistan. Azadirachta indica was applied at 5 &amp;#956;L L-1; NPV at 2.1 x 10(5) polyhedral occlusion bodies (POB) mL4 and chlorantraniliprole at 0.01 &amp;#956;L L-1, either alone or in combinations with each other. The bioassays were conducted at 27 ± 1 °C and 65 ± 5%...
Tipo: Journal article
Palavras-chave: NPV; Chlorantraniliprole; Additive; Populations.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000100009