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| Registros recuperados: 48 | |
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| Soletchnik, Patrick; Ropert, Michel; Bedier, Edouard; Costil, K. S.; Dubois, Brice; Degremont, Lionel; Bouget, Jean-francois; Martin, Jean-louis; Enriquez-diaz, M.; Faury, Nicole; Le Moine, Olivier; Renault, Tristan; Gagnaire, Beatrice; Huvet, Arnaud; Moal, Jeanne; Samain, Jean-francois. |
| Field characterization of summer mortality was performed in France in the frame of the Morest project. Natural and hatchery spat were compared between three oyster production areas in France. Regardless of the natural or hatchery origin, oysters died during the reproduction period after temperature reaches 19 degree C. Thus, in southern areas, temperature accelerated gametogenesis of small spat (10mm) as well as adults, and mortality appeared for the two age classes. In contrast, sexual maturation proceeded more slowly in northern where spat mortality was lower compared to 18 months old oysters. However, critical gametogenesis and temperature were not sufficient to induce mortalities, as observed in examples with stable environment. Alternatively sediment... |
| Tipo: Text |
Palavras-chave: Seasonal variation; Oyster culture; Mortality causes; Hatcheries; Gametogenesis; Environmental factors; Crassostrea gigas; Oysters. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/acte-3348.pdf |
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| Harmelin Vivien, M; Loizeau, Veronique; Mellon-duval, Capucine; Beker, B; Arlhac, D; Bodiguel, Xavier; Ferraton, Franck; Hermand, R; Philippon, Xavier; Salen Picard, C. |
| Carbon and nitrogen stable isotope ratios of particulate organic matter (POM) in surface water and 63-200 mu m-sized microphytoplankton collected at the fluorescence maximum were studied in four sites in the Gulf of Lions (NW Mediterranean), a marine area influenced by the Rhone River inputs, in May and November 2004. Some environmental (temperature, salinity) and biological (POM, Chlorophyll a and phaeopigments contents, phytoplankton biomass and composition) parameters were also analysed. Significantly different C and N isotopic signatures between surface water POM and microphytoplankton were recorded in all sites and seasons. Surface water POM presented systematically lower delta C-13 (similar to 4.2 parts per thousand) and higher delta N-15 (similar to... |
| Tipo: Text |
Palavras-chave: Seasonal variation; PON/Chl a; C/N ratio; Stable isotopes; Fluorescence maximum; Phytoplankton composition; Particulate organic matter. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-5919.pdf |
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| MELLADO, M.; LARA, L. M.; VELIZ, F. G.; SANTIAGO, M. A. de; AVENDAÑO-REYES, L.; MEZA-HERRERA, C.; GARCIA, J. E.. |
| The objective of this work was to obtain prevalence estimates of cloudy vaginal mucus in artificially inseminated Holstein cows raised under intense heat, in order to assess the effect of meteorological conditions on its occurrence during estrus and to determine its effect on conception rate. In a first study, an association was established between the occurrence of cloudy vaginal mucus during estrus and the conception rate of inseminated cows (18,620 services), raised under intense heat (mean annual temperature of 22°C), at highly technified farms, in the arid region of northern Mexico. In a second study, data from these large dairy operations were used to assess the effect of meteorological conditions throughout the year on the occurrence of cloudy... |
| Tipo: Artigo de periódico |
Palavras-chave: Subclinical endometritis; Uterine infection; Infecção uterina; Desempenho reprodutivo.; Gado leiteiro.; Dairy cattle; Heat stress; Reproductive efficiency; Seasonal variation. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1020231 |
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| Almeida, Fabiane Ferreira de; Instituto Nacional de Pesquisas da Amazônia - Programa de Pós-Graduação em Biologia de Água Doce e Pesca Interior; Melo, Sérgio; Instituto Nacional de Pesquisas da Amazônia. |
| Este estudo aborda a variação temporal (sazonal, semanal e nictemeral) e espacial de algumas variáveis limnológicas na região limnética do lago Catalão, um lago da planície de inundação do rio Amazonas. Foram analisados os valores de temperatura, zona eufótica, zona de mistura, condutividade elétrica, oxigênio dissolvido, transparência, nitrogênio e fósforo total, amostrados em quatro estações, em escala semanal, durante um mês no período de seca de 2006 e um mês no período de cheia de 2007. Regressões simples foram realizadas para testar a hipótese da homogeneização de ambientes aquáticos em função da inundação. Foram analisados, também, os valores de temperatura, oxigênio dissolvido e condutividade elétrica em um perfil vertical ao longo de um ciclo... |
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Palavras-chave: 2.05.02.00-1 variáveis limnológicas; Variação nictemeral; Planície de inundação; Variação sazonal; Pulso de inundação; Amazônia Brasileira Ecologia de Ecossistemas (Limnologia) limnological variables; Diel variation; Flood plain lake; Seasonal variation; Flood pulse; Brazilian Amazon. |
| Ano: 2009 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4641 |
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| OLIVEIRA, A. T.; ARAÚJO, M. L. G.; PANTOJA-LIMA, J.; ARIDE, P. H. R.; TAVARES-DIAS, M.; BRINN, R. P.; MARCON, J. L.. |
| Parasitas intraeritrocitários são frequentemente encontrados em peixes, incluindo elasmobrânquios. Os rios Amazônicos possuem ciclos hidrológicos anuais que resultam em modificações drásticas nas condições ambientais, com implicação profunda no ciclo de vida associada a biota dos sistemas fluviais. A arraia de água doce Potamotrygon wallacei (arraia cururu) é uma nova espécie restrita a bacia do médio Rio Negro e sujeita a fortes alterações em seus habitats naturais (igapós) resultantes das constantes variações do nível de água do Rio Negro. Este trabalho demonstra a ocorrência de parasita intraeritrocitário Cyrilia sp. em espécimes de arraias de água doce. Além disso, a prevalência e quantificação de hemoparasitas em diferentes fases do Rio Negro foi... |
| Tipo: Artigo de periódico |
Palavras-chave: Prevalência; Intraeritrocitário; Intraerythrocytic; Freshwater stingray.; Peixe de água doce; Arraia; Variação sazonal; Seasonal variation; Prevalence.. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1073540 |
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| Filogonio,Renato; Del Lama,Fernanda S.; Machado,Leonardo L.; Drumond,Michelle; Zanon,Isabella; Mezzetti,Nathália A.; Galdino,Conrado A. B.. |
| We studied the influence of seasonality on the daily activity pattern and microhabitat use of three sympatric lizard species, Cnemidophorus ocellifer Spix, 1825 (Teiidae), Tropidurus montanus Rodrigues, 1987 and Eurolophosaurus nanuzae (Rodrigues, 1981) (Tropiduridae), in an area of campos rupestres (rocky fields) habitat in state of Minas Gerais, Brazil. Cnemidophorus ocellifer exhibited low density and activity concentrated within the hottest hours of the day, and was observed mainly on shaded rocks. Tropidurus montanus and E. nanuzae had similar activity patterns that did not vary between seasons. Activity of T. montanus was related to environmental temperatures. However, we did not find such relationships for E. nanuzae during the dry season. Both T.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Activity patterns; Seasonal variation; Cnemidophorus ocellifer; Tropidurus montanus; Eurolophosaurus nanuzae. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000400008 |
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| CHAGAS, P. C.; CRANE, J.; CHAGAS, E. A.; VENDRAME, W.; COSTA, B. N. S.; RUBIO NETO, A.; MOURA, E. A. de. |
| Plants phenology is extremely important tool for crop management, crop manipulation, and marketing. The objective of this research was to investigate the phenology and fruit quality of the several Annonaceae species under subtropical conditions of Homestead, Florida, USA. The study was carried out in an experimental sugar apple (Annona squamosa L.), orchard with cultivars: 'LeahReese', 'Lessard Thai' and 'Red' and the atemoya 'Gefner' (A. cherimola x A. squamosa L). |
| Tipo: Artigo de periódico |
Palavras-chave: Flowering stage; Phenological study; Developmental stages; Seasonal variation. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1149985 |
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| Passos,Fernando de Camargo. |
| In this study carried out in the Caetetus Ecological Station, Sao Paulo, southeastern Brazil, a wild group of black lion tamarins was accompanied during 1989 to 1991, to analyse the dietary habits of the species. The scan sampling method was used to gather data. A total of 961 behaviors were recorded, of which feeding occupied 23.3% of the time involved in the behaviors. The major dietary components observed in the black lion tamarins were fruits, tree exudates and animal preys (67.9%, 22.8% and 8.9% respectively). Fruits varied monthly from 47.4 to 97.1 %, being consumed more during the rainy season, while tree exudates varied from 0 to 54.7%, and were consumed mainly during the dry season. The animal prey accounted for 0 to 15.8% of the diet. The most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Callitrichidae; Diet; Feeding behavior; Seasonal variation; Black lion tamarin. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000500019 |
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| Antunes,Alexsander Z.. |
| Diurnal variation in detection can influence bird census results. I measured variation in daily and seasonal detections of birds in a forest fragment at Barreiro Rico ranch, Anhembi, state of São Paulo. Birds were recorded on transects of unlimited distance, sampled one day per month, dawn to dusk, between December 2000 and March 2001 (rainy season) and between May and August 2001 (dry season). Significant daily variation in detection occurred during the rainy season, with most detections between dawn and 9 h. In the dry season detections declined for total numbers of individuals and species and most detections occurred during late morning and mid afternoon. Detection patterns might reflect seasonal variation in bird behavior rather than seasonal variation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Census; Detection; Seasonal variation; Transects. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200011 |
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| MARTINS, C. C.; SANTOS, R. S.; SUTIL, W. P.; OLIVEIRA, J. F. A. de. |
| Coffea canephora (Conilon coffee) has great economic importance for the state of Acre, in northern Brazil. The use of insecticides in this crop has increased considerably in recent years. In order to find species of green lacewing (Chrysopidae, Neuroptera) with potential for use in biological pest control in coffee plantations, we sampled green lacewings during one year in an experimental plantation of Conilon coffee in Acre, in order to assess the diversity, abundance and seasonal occurrence of Chrysopidae species. Samplings were carried out weekly using an entomological net. Overall, 1079 specimens of seven green lacewing species were collected: Ceraeochrysa cincta, Ceraeochrysa claveri, Ceraeochrysa cubana, Ceraeochrysa everes, Chrysoperla externa,... |
| Tipo: Artigo de periódico |
Palavras-chave: Café Conilon; Green lacewings; Plagas de plantas; Agentes de control biológico; Variación estacional; Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Café; Coffea Canephora; Praga de Planta; Inseto Para Controle Biológico; Neuroptera; Variação Sazonal; Campo Experimental; Coffea; Plant pests; Biological control agents; Chrysopidae; Seasonal variation. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1111622 |
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| Prou, Jean; Heral, Maurice; Goulletquer, Philippe; Forget, Maïté; Bougrier, Serge; Razet, Daniel. |
| The project of cultivation of oyster has been designed to evaluate the growth rate, the mortality, the reproductive effort, production and biochemical composition of the oyster function of the density and the depth. This plan was intended: - to build model of growth rate, - to demonstrate the action of the different parameters on growth rate (temperature, food effect...), - to evaluate the density effect to see if the available food could be a limiting factor, - to estimate the effect of the depth joined to the impact of the high turbidity near the bot tom, - to detect the mortality related to the prevalence of diseases. The project began in July 1989 by dredging 20 000 small oysters at the mouth of the Patuxent River near Cove Point. Three experimental... |
| Tipo: Text |
Palavras-chave: Physiology; Seasonal variation; Biochemical composition; Density; Crassostrea virginica; Cheseapeake Bay. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/00200/31104/29503.pdf |
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| Vendel,Ana Lúcia; Lopes,Sabine Granado; Santos,César; Spach,Henry Louis. |
| Studies were carried out on fish assemblages in a tidal flat. Samples were obtained monthly at low tide of the half moon in the tidal flat of Paranaguá Bay, Brazil, with two seine nets, one with a 1 mm mesh, 30 m in length and 3 m in height and another with a 10 mm mesh, 65 m in length and 2 m in height. A total of 8,890 fish were captured, comprising 24 families and 53 species. The most abundant species were Harengula clupeola and Atherinella brasiliensis, which represented 63.4% of the total, capture. A seasonal tendency was observed in the abundance of fishes, with less fishes being captured during winter and part of spring. The number of species showed a seasonal pattern, with the gradual decrease through winter and a marked increase in summer. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tidal flat; Fish assemblages; Seasonal variation; Brazil. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000200015 |
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| Registros recuperados: 48 | |
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