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A conceptual model to describe heat stress in dairy cows from actual to questionable loops Acta Agron. (Palmira)
Molina Benavides,Raúl Andrés; Sánchez Guerrero,Hugo; Atzori,Alberto Stanislao.
Abstract Thermal environment is recognized to be one the most important ecological factor to determine domestic animal growth, development and productivity for direct and indirect effects on its physiology and behavior. Despite having specific and individual adaptation, is very common, within seasonal or diurnal temperature variations, animals deal with situations outside their thermal comfort zone. Due to heat stress, dairy cows reduce milk production and fertility, and therefore, had achieved an increasing in metabolic disorders incidence, causing low revenues to farm in short and medium periods. Due to world climate change more impact of the meteorological variables on animal responses is expected for the future. This study aimed to describe and...
Tipo: Journal article Palavras-chave: Climate change; Grazing; Livestock production systems; Milk production; System dynamics; Temperature.
Ano: 2018 URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100059
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A flow-through rearing system for ecophysiological studies of Pacific oyster Crassostrea gigas larvae ArchiMer
Rico Villa, Benjamin; Woerther, Patrice; Mingant, Christian; Le Piver, David; Pouvreau, Stephane; Hamon, Michel; Robert, Rene.
While literature is relatively abundant on adult shellfish, ecophysiological studies at the larval stage are scarce because of both technical difficulties and inadequate methodology. A tool dedicated to provide basic information for larval ecophysiology was accordingly developed. Two steps were followed: first a flow-through method of Crassostrea gigas larval culture was perfected during a set of experiments in which rearing systems and larval density were assessed. Then a continuous hydrobiological data recorder was adapted with modifications to comply with our experimental aim. SILO (Système d'Instrumentation des Larves en flux Ouvert) allowed the successive acquisition of hydrobiological parameters in ten 150 l larval tanks in which larvae were reared...
Tipo: Text Palavras-chave: Temperature; Ecophysiology; Bivalve larvae; Crassostrea gigas; Flow through.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4167.pdf
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A model of nematode dynamics in the Westerschelde Estuary OMA
Li, J.; Vincx, M.; Herman, P.M.J..
We developed a time dynamic model to investigate the temporal dynamics of nematode community in the brackish zone of the Westerschelde Estuary. The biomass of four nematode feeding groups observed from March 1991 to February 1992 is used to calibrate the model. Using environmental data as the input, the model predicts the temporal modification and interrelation of four nematode feeding groups. Nematodes achieve a dominant position in the community because of their lower loss rate (in respiration, excretion and natural death). Predators which are deposit-feeding macrobenthos control the variations of dominant nematodes, such as omnivores and non-selective deposit feeders. Food availability causes modification only for rare nematodes such as epigrowth...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diatoms; Ecology; Food; Light; Marine nematodes; Meiobenthos; Population dynamics; Predation; Respiration; Temperature; Nematoda [Nematodes].
Ano: 1996 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7284
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A room temperature procedure for the manual determination of urea in seawater OMA
Goeyens, L.; Kindermans, N.; Yusuf, M.A.; Elskens, M..
Several earlier studies underpin the important role of dissolved organic matter and more particularly urea in phytoplanktonic nitrogen uptake fluxes. Generally, the determination of urea concentrations relies on the formation of an imidazolone-thiosemicarbizide complex, a complexation which requires very accurate temperature control when carried out at high temperature. It is also possible, however, to obtain reliable results with a room temperature procedure. The measured abundances for both complexation at high temperature (85 degree C, 20 min) and at ambient temperature (22 degree C, 72 h) are closely comparable. Lower values are observed for temperatures <10 degree C though. Moreover, a comparison of both techniques reveals similar precision...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dissolved organic carbon; Sea water; Temperature; Urea; Water analysis.
Ano: 1998 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7858
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Activite mecanique comparee des huitres portugaises et des Ciones, Epibiontes. ArchiMer
Le Borgne-david, A.
The Portuguese oyster (Crassostrea angulata) and the sea-squirt Ciona intestinalis are both filter-feeders and compete for space in the oyster beds. Valve movement in oysters and shortening and elongation in Ciona were recorded on a smoked drum. Oysters showed a slow (3 one half min) spontaneous opening/closing rhythm, which was speeded up by stimulatory (vitamin) substances and increased in amplitude by toxic accumulated waste substances, or sudden change in temperature. Ciona showed a regular contraction rhythm of similar to 1 min and single sharp shortening after a strong light stimulus or a food particle touch stimulus to the oral tentacles. The neural ganglion discharges spikes 3 times faster than in the dark, after light stimulation. Filtration rates...
Tipo: Text Palavras-chave: Stimulation; Rhythm; Temperature; Crassostrea angulata; Portuguese oyster.
Ano: 1972 URL: http://archimer.ifremer.fr/doc/1972/publication-2052.pdf
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Agroclimatic zoning of the Brazilian state of Mato Grosso for the production of soybean seeds of early cultivars. Repositório Alice
NERES, D. C. de C.; AMORIM, R. S. S.; ALBUQUERQUE, M. C. de F. e; PADUA, G. P. de; FRANÇA-NETO, J. B..
bitstream/item/199661/1/aNeres.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Glycine Max; Soja; Clima; Temperatura; Semente; Altitude; Zoneamento Climático; Zoneamento Agrícola; Soybeans; Agroclimatology; Zoning; Temperature; Seeds.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1110693
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Agroclimatological information about the experimental field of the SHIFT-area, ENV 23, 42, 45, 54. Repositório Alice
CORREIA, F. W. S.; LIEBEREI, R..
Throughout the entire experimental phase of the SHIFT-colaboration of Embrapa Amazonia Ocidental (Manaus-AM) and the University of Hamburg, agrometeorological data have been monitored by a Stationary Climatological Station situated directly at the experimental site (3° 8' S, 59° 52' W). These data have been compared with the ten-year means of the Embrapa Agrometeorological Station (Manaus-AM), in a latitude of 03° 08' 05" S, 60° 01' W in an altitude of 44m above sea level. The climate of the experimental field is classified as AF according to Koppen. The years 1996 and 1997 reveal climati characteristics of "El Nino" years and, thus, they allow to develop an excellent idea about short time local changes of climatic factors compared to a ten-year means.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Agrofloresta; Brasil; Amazonas; Manaus; Tropicl rain forests; Precipitation; Atmosphere; Radiations; Winds; Agricultura; Ar; Atmosfera; Clima; Evaporação; Floresta Tropical Úmida; Meteorologia; Precipitação Pluvial; Radiação; Temperatura; Umidade Relativa; Velocidade; Vento; Agriculture; Agroforestry; Climate; Evaporation; Meteorology; Multiple cropping; Rain; Relative humidity; Temperature; Velocity.
Ano: 1998 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/668394
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Agroclimatological information about the experimental field of the SHIFT-area, ENV 23, 42, 45, 54. Infoteca-e
CORREIA, F. W. S.; LIEBEREI, R..
Throughout the entire experimental phase of the SHIFT-colaboration of Embrapa Amazonia Ocidental (Manaus-AM) and the University of Hamburg, agrometeorological data have been monitored by a Stationary Climatological Station situated directly at the experimental site (3° 8' S, 59° 52' W). These data have been compared with the ten-year means of the Embrapa Agrometeorological Station (Manaus-AM), in a latitude of 03° 08' 05" S, 60° 01' W in an altitude of 44m above sea level. The climate of the experimental field is classified as AF according to Koppen. The years 1996 and 1997 reveal climati characteristics of "El Nino" years and, thus, they allow to develop an excellent idea about short time local changes of climatic factors compared to a ten-year means.
Tipo: Capítulo em livro técnico (INFOTECA-E) Palavras-chave: Agrofloresta; Brasil; Amazonas; Manaus; Tropicl rain forests; Precipitation; Atmosphere; Radiations; Winds; Agricultura; Ar; Atmosfera; Clima; Evaporação; Floresta Tropical Úmida; Meteorologia; Precipitação Pluvial; Radiação; Temperatura; Umidade Relativa; Velocidade; Vento; Agriculture; Agroforestry; Climate; Evaporation; Meteorology; Multiple cropping; Rain; Relative humidity; Temperature; Velocity.
Ano: 1998 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/668394
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Agroclimatology of West Africa: Burkina Faso Open Agri
M.V.K..
Palavras-chave: Land management; Water balance; Agroclimatology; Evapotranspiration; Climate; Wet season; Temperature; Atmospheric disturbances; Runoff; Climatic zones.
Ano: 1987 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4043
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Allelopathic Potential of Purple Nutsedge (Cyperus rotundus L.) and Barnyardgrass (Echinochloa crusgalli (L.) Beauv.) on Corn (Zea mays L. cv. Tainung No. 1 ). Ⅱ. Weed residue Effects on Corn Emergence and Seedling Groeth Taiwan Agricultural Research Institute
Fu-Chou Chang; Chwen-Ming Yang; 張富洲; 楊純明.
[[abstract]]Field-grown mature plant residues (debris) of purple nutsedge and barnyardgrass were incorporated into the soil to determine their allelopathic potential on the emergence and seedling growth of corn. Influence of temperature on the magnitude of weed residue effects was also investigated. It was found that soils incorporated with weed residues reduced both the cumulative and the maxi-mal emergence rates of corn at 20 and 25°C but not at 33°C of purple nutsedge treatment. Plant height of corn was enhanced by the increasing temperatures but was retarded in the weed residue-incorporated soils. After one week from planting, high temperature increased plant growth, and hence the total plant and root weights. Effects of weed residue on plant weight,...
Palavras-chave: Allelopathic potential; Purple nutsedge; Barnyardgrass; Corn; Weed residue effect; Temperature; Emergence; Seedling growth [[classification]]6.
Ano: 1992
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Alocação de fotoassimilados em folhas e frutos de cafeeiro cultivado em duas altitudes Repositório Alice
LAVIOLA, B.G.; MARTINEZ, E.P.; SALOMÃO, L.C.C.; CRUZ, C.D.; MENDONÇA, S.M.; NETO, A.P..
O objetivo deste trabalho foi avaliar a alocação de fotoassimilados em frutos e folhas de cafeeiro arábico, da antese à maturação, em duas altitudes. O experimento foi constituído da variedade de cafeeiro (Coffea arábica L.) Catuaí IAC-44, cultivada a 720 e 950 m de altitude, no Município de Martins Soares, MG. O delineamento experimental foi inteiramente ao acaso, com três repetições, em um esquema de parcela subdividida no tempo. Na altitude de 720 m o acúmulo de amido, açúcares solúveis totais, açúcares redutores e açúcares não-redutores em frutos de cafeeiro deu-se em menor tempo. O acúmulo de amido na altitude de 720 m antecedeu o acúmulo de amido na altitude de 950 m, e os frutos apresentaram maior porcentagem de acúmulo relativo desse composto no...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Coffea arabica; Fisiologia vegetal; Carboidratos; Temperatura; Plant physiology; Carbohydrates; Temperature.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/122820
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Altas temperaturas estacionales del agua como condición disturbadora de las macroalgas del Parque Nacional Tairona, Caribe colombiano: una hipotesis OceanDocs
Bula-Meyer, G..
Con base en observaciones de campo y en mediciones de los factores temperatura, salinidad, nutrientes, transparencia y movimiento del agua, se analizó cada uno de éstos con el fin de conocer el factor más importante en el control del crecimiento y productividad de las macroalgas del Parque Nacional Tairona en la costa Caribe de Colombia. Se hipotetiza que el factor clave que regula estos aspectos fisiológicos de las macroalgas del Parquees la temperatura. Su ascenso por encima de los 26°C, como resultado de la declinación del afloramiento y de otros fenómenos oceanográficos-meteorológicos, produce la disturbancia (remoción de biomasa) de las macroalgas que se observa anualmente en la estación húmeda mayor.
Tipo: Journal Contribution Palavras-chave: Temperature; Salinity; Nutrients (mineral); Temperature; Salinity; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_6751.
Ano: 1990 URL: http://hdl.handle.net/1834/3882
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An analysis of natural factors of traffic accidents involving Yezo deer (Cervus nippon yesoensis) OAK
Kawata, Yukichika.
In Hokkaido, Japan, the number of Yezo deer (Cervus nippon yesoensis) has recently increased drastically, causing a large number of deer-vehicle traffic accidents. This paper examines conditions related to deer-vehicle traffic accidents by analysing the following relationships: time of accident and lunar phase; time of accidents and time of sunrise/sunset; likelihood of accidents and rainfall patterns, temperature and season (particularly snow and hunting seasons). The results suggest that the potential for deer-vehicle traffic accidents increases during hunting and non-snow seasons when there is little or no rainfall, just before sunrise or just after sunset, or during a full, first quarter, or third quarter moon. A statistically significant relationship...
Palavras-chave: Deer-vehicle traffic accidents; Hunting season; Lunar phase; Rainfall; Snow season; Sunrise/sunset; Temperature.
Ano: 2011 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3079
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Análise de tendências de temperatura mínima do Brasil. Repositório Alice
GONÇALVES, R. R. do V.; ASSAD, E. D..
A concentração dos gases de efeito estufa vem aumentando consideravelmente nos últimos 150 anos e tem sido considerado como principal causa do aquecimento global no planeta nesse período. O objetivo do trabalho foi analisar as tendências de temperatura mínima nas cinco regiões do Brasil. Foram calculadas as temperaturas mínimas mensais e anuais de cada estação por meio da média aritmética dos valores diários e mensais, respectivamente. Calculou-se também a média móvel de cinco anos e o desvio da temperatura mínima em relação a média da temperatura mínima no período de estudo de cada estação meteorológica. As análises dos desvios da temperatura mínima anual, em relação à média da série de dados de cada estação meteorológica analisada, indicaram tendências...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Clima; Mudança climática; Aquecimento global; Temperatura; Climate; Climate change; Global warning; Temperature.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/513444
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Anchovies of the Sea of Azov and The Black Sea: Regularities of wintering migrations (Brief review) IBSS Repository
Shulman, G. E..
Close relation between internal (level of fat stores) and external (temperature fall) impulses of wintering migration of Azov and Black Sea anchovies Engraulis encrasicolus maeoticus and E. e. ponticus (“dosage principle”) was revealed. Schools with high fatness begin migration at more high temperature than that ones with low fatness. Intensity of migration also correlates with level of fatness. Regularities obtained may be used for study of wintering migration of other truly marine fishes.
Tipo: Journal Contribution Palavras-chave: Anchovy; Migrations; Fat; Temperature; Анчоус; Миграции; Жир; Температура.
Ano: 2002 URL: http://repository.ibss.org.ua/dspace/handle/99011/143
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Anchovy population expansion in the North Sea ArchiMer
Petitgas, Pierre; Alheit, Juergen; Peck, Myron A.; Raab, Kristina; Irigoien, Xabier; Huret, Martin; Van Der Kooij, Jeroen; Pohlmann, Thomas; Wagner, Carola; Zarraonaindia, Iratxe; Dickey-collas, Mark.
The abundance and spatial occupation of European anchovy Engraulis encrasicolus have increased in the North Sea since the mid-1990s. We use a cross-disciplinary approach combining genetics, transport modelling, survey time series analyses and physical oceanographic modelling to investigate 3 hypotheses on the reasons for this change. Evidence from connectivity studies suggests that the population of North Sea anchovy is separate from that in the Bay of Biscay. The recruitment pulses observed in survey data fit a life cycle which includes spawning in early summer and larval development in late summer. This also supports the concept of population expansion originating from local remnant population(s). In terms of growth physiology, suitable thermal windows...
Tipo: Text Palavras-chave: Climate variability; Small pelagic fish; Regime shift; Temperature; Anchovy; North Sea.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00060/17140/14638.pdf
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Aplicação de Sistema de Informações Geográficas na análise espacial de doenças do milho no Brasil. Repositório Alice
HAMADA, E.; GHINI, R.; LANA, J. T. de O.; SABATO, E. de O..
This study presents an application of the geographical information system technology on plant disease involving a multidisciplinary teamwork of geoprocessing and physiopathology specialists. The spatial analysis tools in a GIS were used to evaluate the spatial distribution of two diseases of maize in Brazil: polysora rusl caused by Puccinia polysora and tropical rust caused by Physopella zeae. A database of cIimate variables (mean temperature. relative humidity. and leaf wetness duration) of cIimatological normal from 1961-1990 was obtained and then related it to a mathematical model of disease development (polysora rust) and to the cIimate intervals (tropical rust) in order to obtain the maps. The choice of the model or the favorable climate interval is...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Temperature; Relative humidily; Leaf wetness duration; Temperatura; Umidade relativa; Período de Molhamento foliar.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/491970
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Assessing chronic fish health: An application to a case of an acute exposure to chemically treated crude oil ArchiMer
Mauduit, Florian; Domenici, P.; Farrell, A. P.; Lacroix, C.; Le Floch, S.; Lemaire, P.; Nicolas-kopec, A.; Whittington, M.; Zambonino-infante, Jose-luis; Claireaux, Guy.
Human alteration of marine ecosystems is substantial and growing. Yet, no adequate methodology exists that provides reliable predictions of how environmental degradation will affect these ecosystems at a relevant level of biological organization. The primary objective of this study was to develop a methodology to evaluate a fish’s capacity to face a well-established environmental challenge, an exposure to chemically dispersed oil, and characterize the long-term consequences. Therefore, we applied high-throughput, non-lethal challenge tests to assess hypoxia tolerance, temperature susceptibility and maximal swimming speed as proxies for a fish’s functional integrity. These whole animal challenge tests were implemented before (1 month) and after (1 month)...
Tipo: Text Palavras-chave: Fish; Oil spill; Dispersant; Biomarkers; Physiological integrity; Ecological performance; Temperature; Hypoxia; Swimming; Growth.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00347/45828/45916.pdf
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Assessing the long-term effect of exposure to dispersant-treated oil on fish health using hypoxia tolerance and temperature susceptibility as ecologically relevant biomarkers ArchiMer
Mauduit, Florian; Farrell, Anthony P.; Domenici, Paolo; Lacroix, Camille; Le Floch, Stephane; Lemaire, Pphilippe; Nicolas-kopec, Annabelle; Whittington, Mark; Le Bayon, Nicolas; Zambonino-infante, Jose-luis; Claireaux, Guy.
Consequences of exposure to polyaromatic hydrocarbons (PAH), toxic components of crude oil, on fish has been widely documented due to their ecological and economical importance. However, although forming a valuable and consistent body of knowledge, use of these data in spill response is limited. Objective of the present study was thus to facilitate the translation of published data into information of operational value. For this, we investigated the dose‐response relationship between dispersant‐treated oil exposure and ecologically‐relevant consequences by combining laboratory and field experiments. Effects were examined over almost a year using juveniles of the slow growing, commercially important European sea bass (Dicentrarchus labrax). Moreover, a...
Tipo: Text Palavras-chave: Oil spills; Polycyclic aromatic hydrocarbons (PAHs); Fish indices; Hypoxia; Temperature.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00455/56679/58438.pdf
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Atividade coagulante de extratos vegetais no leite integral de caprino e bovino. Repositório Alice
LAGUNA, L. E.; EGITO, A. S. do..
Resumo: A procura de coalhos alternativos para a substituição total ou parcial dos coalhos de origem animal por vegetal na fabricação de alguns tipos de queijos de cabra ou de bovino, justifica-se pela possibilidade de fabricar novos queijos que possam competir no mercado globalizado. Avaliações da atividade de sete extratos vegetais brutos, previamente codificados como CNPC-7-1; CNPC-8; CNPC-10; CNPC-12; CNPC-19; CNPC-20 e Cynara scolymus foram testados no leite integral de caprino e bovino. As amostras foram submetidas a diferentes temperaturas, com o objetivo de identificar quais as temperaturas e tempos de maior atividade coagulante. Os resultados obtidos revelaram que existe diferença significativa, no tempo e na temperatura de coagulação dos extratos...
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Leite de vaca; Leite de cabra; Coagulação; Extrato vegetal; Temperatura; Caprino; Goat milk; Vegetable extracts; Coagulation; Cow milk; Temperature.
Ano: 2001 URL: http://www.alice.cnptia.embrapa.br/handle/doc/528969
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