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| Registros recuperados: 122 | |
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| Devauchelle, Nicole; Barret, Jean; Salaun, Gilles. |
| This report compiles 17 short and illustrated syntheses concerning the natural strategies of reproduction and the artificial control of the reproductive process for the flat oyster, Ostrea edulis, the japanese oyster, Crassostrea gigas, the mussels, Mytilus edulis and My ti/us galloprovincialis, the scallop, Pecten maximus. An additional syntheses is presented, as a comparison within molluscs, which are the main research topics at IFREMER concerning the artificial control of the reproductive processes in Marine Fish. Three main subjects are documented : 1. the ecophysiology of the natural period of reproduction in the wild, 2. the methods developed in the hatcheries for the artificial control of the reproductive periods, the gametes collection and the... |
| Tipo: Text |
Palavras-chave: Bivalves; Stratégie de reproduction; Contrôle artificiel; Gonades; Gamètes; Coquille St Jacques; Moules; Huîtres; Nourriture; Photopériode; Température; Biologie; Physiologie; Biochimie.; Bivalves; Reproductive strategy; Artificial induction of reproduction; Gonads; Gametes; Scallop; Mussels; Oysters; Food; Light; Temperature; Biology; Physiology; Biochemistry.. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00043/15441/12811.pdf |
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| Daouk, Tarek; Larcher, Thibaut; Roupsard, Francois; Lyphout, Laura; Rigaud, Cyril; Ledevin, Mireille; Loizeau, Veronique; Cousin, Xavier. |
| Although the use of polychlorinated biphenyls (PCBs) has been banned for several decades, they are still present in the environment and are occasionally mechanically released from sediment or transferred through the trophic chain. Field analyses have established correlations between exposure to PCBs and alterations in fish physiology including reproductive function. Experimental exposures have been mainly performed using dioxin-like PCBs or other congeners at very high concentrations. However, these studies are often difficult to relate to real-life conditions. In the present study, we performed a life-cycle exposure using zebrafish model and mixtures representative of some environmental situations in terms of doses, composition and containing mainly non... |
| Tipo: Text |
Palavras-chave: Zebrafish; PCBs; Chronic exposure; Physiology; Reproduction; Atresia. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00059/17038/14608.pdf |
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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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| González-fernández, Carmen; Toullec, Jordan; Lambert, Christophe; Le Goïc, Nelly; Seoane, Marta; Moriceau, Brivaela; Huvet, Arnaud; Berchel, Mathieu; Vincent, Dorothée; Courcot, Lucie; Soudant, Philippe; Paul-pont, Ika. |
| The potential presence of nanoplastics (NP) in aquatic environments represents a growing concern regarding their possible effects on aquatic organisms. The objective of this study was to assess the impact of polystyrene (PS) amino-modified particles (50 nm PSNH2) on the cellular and metabolic responses of the diatom Chaetoceros neogracile cultures at two essential phases of the growth cycle, i.e. exponential (division) and stationary (storage) phases. Both cultures were exposed for 4 days to low (0.05 μg mL−1) and high (5 μg mL−1) concentrations of PS-NH2. Exposure to NP impaired more drastically the major cellular and physiological parameters during exponential phase than during the stationary phase. Only an increase in ROS production was observed at... |
| Tipo: Text |
Palavras-chave: Nanoplastics; Diatoms; Physiology; Transparent exopolymer particles. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00491/60235/63627.pdf |
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| Deslous-paoli, Jean-marc. |
| On the contrary to the U. S. where they represent but 4.6% of the total marine production , mollusc, principally bivalves, can no longer be considered as a marginal production. In France, 100 000 ton of oysters, 98% of which is represented by Crassostrea gigas (Héral & al., 1985) and 85 000 ton of mussels (Mytilus edulis, Mytilus edulis galloprovincialis) (Dardignac, 1985) are produced yeraly. Elsewhere, new rearings are being developed, such as pectinidae and Ruditapes philippinarum, on the Atlantic and Mediterranean coasts. The species presently cultured, some of which dependiing only on natural collections (Crassostrea gigas, Mytilus edulis, Mytilus galloprovincialis while others depend on hatchery production, either partially Crasssotrea gigas in... |
| Tipo: Text |
Palavras-chave: Ruditapes decussatus; Ostrea edulis; Mytilus edulis; Crassostrea gigas; Bivalves; Physiology; Digestion; Feeding. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1986/acte-7476.pdf |
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| Urios, Laurent; Agogue, Hélène; Lesongeur, Francoise; Stackebrandt, Erko; Lebaron, Philippe. |
| A novel aerobic, Gram-negative bacterium, named 13IX/A01/164(T), was isolated from surface waters in the coastal north-western Mediterranean Sea. Cells were motile, straight rods, 2-5 mu m long and 0-2 mu m wide, and formed orange colonies on marine agar medium. The G+C content of the genomic DNA of strain 13IX/A01/164T was 42 mol%. Phylogenetic analysis of the 16S rRNA gene sequence placed the strain in the phylum Bacteroidetes within the family Crenotrichaceae. On the basis of 16S rRNA gene sequence comparison and physiological and biochemical characteristics, this isolate represents a novel species of a new genus, for which the name Balneola vulgaris gen. nov., sp. nov. is proposed. The type strain of Balneola vulgaris is 13IX/A01/164T (=DSM 17893T=CIP... |
| Tipo: Text |
Palavras-chave: Mediterranean sea; Coastal waters; Microbiology; Physiology; Biochemistry; Gene sequence; Balneola vulgaris. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2126.pdf |
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| Abdennadher, M.. |
| Cette thèse a pour objectif principal la caractérisation taxonomique, physiologique et écologique d’espèces de dinoflagellés associées à des alertes de toxicité dans le golfe de Gabès à savoir : Alexandrium minutum, Prorocentrum lima, Coolia monotis et Ostreopsis ovata. L’optimisation des conditions de culture des espèces de dinoflagellés et la mise en place d’une phytothèque composée d’une collection de cultures de microalgues toxiques étaient notre priorité dans cette investigation. Une analyse de la base des données REPHY a été effectuée dans le cadre de cette thèse. L’étude taxonomique moyennant la microscopie électronique en transmission et à balayage nous a permis de déceler les importantes caractéristiques morphologiques de distinction pour chaque... |
| Tipo: Theses and Dissertations |
Palavras-chave: Physiology; Taxonomy; Ecology; Phytoplankton culture. |
| Ano: 2014 |
URL: http://hdl.handle.net/1834/5924 |
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| Flores, Andressa Vasconcelos; Borges, Eduardo Euclydes de Lima e; Gonçalves, José Francisco de Carvalho; Guimarães, Valéria Monteze; Ataíde, Glauciana da Mata; Barros, Daniela de Pádua; Pereira, Márcio Dias. |
| The objective of this work was to investigate the effect of substrate, color and size on the germination and vigor of Melanoxylon brauna seeds. It was performed two essays. In the first, the seeds were classified by color (light and dark) and size (small and large). In the second essay, it was investigated the influence of substrates on sand, between sand, above paper, between paper and in paper rolls, type germitest. In both essays, the seeds were maintained in controlled conditions (light and temperature) during 10 days. The percentage of germination and germination speed index (GSI) were calculated. Furthermore, it was determined the weight of 1,000 seeds and the germination of the species was characterized by observation until the seedling formation.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiology; Viability; Propagation; Morphology Silvicultura - sementes florestais Fisiologia; Viabilidade; Propagação; Morfologia. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/558 |
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| Sousa,Valéria F. de O.; Costa,Caciana C.; Diniz,Genilson L.; Santos,João B. dos; Bomfim,Marinês P.; Lopes,Kilson P.. |
| ABSTRACT The melon is an outstanding fruit crop in Brazil, mainly in the Northeast region due to favorable conditions for cultivation. Water salinity affects the growth and production of several species, but there is tolerance among cultivars of the same species. The objective of this study was to evaluate the growth and gas exchange in melon seedlings subjected to water salinity. Experiment was carried out in a greenhouse belonging to the Center of Sciences and Agri-Food Technology, Federal University of Campina Grande, Pombal, PB, Brazil, from September to October 2016. The experimental design was a randomized complete block design in a 6 x 5 factorial scheme, with four replicates, for six cultivars of melon (Natal, Solares, Goldex, Iracema, Mandacaru... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo L.; Cultivars; Physiology. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200090 |
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| Lopes Neto,José P.; Marques,Jordânio I.; Furtado,Dermeval A.; Lopes,Fernanda F. de M.; Borges,Valéria P.; Araújo,Tiago G. P.. |
| ABSTRACT Goats are homeothermic animals considered as rustic from the bioclimatic point of view, but the reduction of their productive efficiency may occur in unfavorable thermal conditions. The present study was carried out to evaluate pupil dilation as an indicator of thermal stress in Boer crossbred goats maintained under controlled environmental conditions. Six male crossbred goats of the Boer breed were distributed in a completely randomized design submitted to temperatures of 26, 29 and 33 °C. The pupillary dilation and pupillary temperature, respiratory frequency, heart rate, surface and rectal temperatures were monitored. The significant increase in physiological responses occurred in response to the increase in air temperature. An increase of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiology; Pupillometry; Thermal stress; Physiological responses. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001200866 |
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| Costa,Gustavo A.; Santos,Leonardo D. T.; Ferreira,Guilherme A. de P.; Cruz,Leandro R. da; Machado,Vitor D.; Rocha,Leonardo M.. |
| ABSTRACT Variations in environmental conditions, such as the availability of light, can affect the efficacy of herbicides because they alter the biological characteristics of plants including those that are related to the plant’s sensitivity to herbicides. Therefore, the objective of the present study was to assess the influence of environments with different light availabilities, and of the application of glyphosate and carfentrazone-ethyl (separately or in combination) on the morphophysiology and control of Macroptilium atropurpureum. An experimental design of randomized blocks with five replicates was used, with treatments arranged in a split-plot design. The plots were composed of three levels of shading (full sunlight, 50% shading, and 70% shading);... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiology; Siratro; Photosynthetic rate; Leaf area. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018001200819 |
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| Registros recuperados: 122 | |
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