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| Registros recuperados: 672 | |
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| Fabioux, Caroline; Huvet, Arnaud; Le Souchu, Pierrick; Le Pennec, Marcel; Pouvreau, Stephane. |
| This study examined the gametogenic cycle of Crassostrea gigas in controlled conditions over one year, with a focus on the initiation of gametogenesis. This work analysed also the role of temperature and photoperiod in the regulation of oyster reproduction. Broodstock were maintained in natural (NC), accelerated (AC) and perpetual winter (WC) conditions of temperature and photoperiod, with feeding ad libitum. Qualitative and quantitative analyses of the reproductive pattern were performed using biometric measurement approach, sex ratio determination, histology and a gonad filling index. Each experimental treatment led to different strategies for growth and resource allocation. The gametogenic cycle, appeared entirely modulated, accelerated or delayed, by... |
| Tipo: Text |
Palavras-chave: Temperature; Regulation; Gonad filling index; Gonial mitosis; Reproduction; Oyster. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-826.pdf |
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| Bayed, Abdellatif; Quiniou, Francoise; Benrha, Ali; Guillou, Monique. |
| The condition of three intertidal Paracentrotus lividus populations, which inhabit an area between Rabat and Casablanca (Morocco) known by its high wave energy and its substantial anthropogenic disturbances were described. The growth rate of the juvenile sea urchins in this intertidal zone was low compared with more sheltered populations. A sharp increase in the gonad index was observed between January and March at the beginning of a period of algal production, and was concomitant with increases in seawater temperature and food consumption rate. This gonad index increase was followed by a single spawning period occurring between March and June, probably triggered by the phytoplankton bloom induced by upwelling conditions. Larval development in all three... |
| Tipo: Text |
Palavras-chave: Moroccan Atlantic; Growth; Population; Juvenile; Reproduction. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-602.pdf |
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| 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 |
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| Debas, L; Fostier, A; Fuchs, Jacques; Weppe, M; Nedelec, Georges; Benett, A; Cauty, C; Jalabert, B. |
| The Polynesian grouper, Epinephelus microdon , was chosen as an experimental model in order to investigate about factors controlling sexuality in groupers. |
| Tipo: Text |
Palavras-chave: French Polynesia; Epinephelus microdon; Sex ratio; Sexual maturity; Sex hormones; Sex determination; Sex; Fish culture; Endocrinology; Reproduction; Sex reversal; Animal morphology. |
| Ano: 1989 |
URL: http://archimer.ifremer.fr/doc/1989/acte-1439.pdf |
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| His, Edouard; Borel, Michel; Robert, Rene; Laborde, Jean-louis. |
| La numération des larves d'huître dans le plancton renseigne les ostréiculteurs sur la date de pose des collecteurs. La technique utilisée est très ancienne (BOURY, 1928) ; pour chaque station trois prélèvements par traits de filets pendant 10 minutes sont effectués : deux en surface (filet 200 et filet 130) et un à 1 mètre de profondeur (filet 130). Une méthode par pompage avec mesure instantanée du volume d'eau filtrée a été mise au point (prélèvements en surface et à 1 mètre de profondeur, et rétention des véligères sur filets 200). La comparaison des deux techniques met en évidence l'inadaptation de l'ancienne méthode. Le choix de la porosité (70 µm pour les filets 200) est mal adapté à la récolte des larves D (stade 1) dont le nombre peut être sous... |
| Tipo: Text |
Palavras-chave: Numération; Technique; Reproduction; Crassostrea gigas; Larves; Naissain; Recrutement; Ostréiculture. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/1987/acte-6444.PDF |
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| His, Edouard. |
| A la suite des mortalités massives qui avaient affecté la population de C. angulata Lmk dès le premier trimestre 1971 dans le bassin d'Arcachon, la décision fut prise de renforcer rapidement le stock des géniteurs de C. gigas, susceptible d'assurer dès l'été une récolte de naissains et de permettre dans l'avenir une reconstitution des gisements naturels anéantis. En effet la présence sur les collecteurs immergés au cours de l'été 1970 de quelques sujets de l'espèce nouvellement introduite prouvait la possibilité pour les huîtres japonaises de se reproduire dans nos eaux. |
| Tipo: Text |
Palavras-chave: Ostréiculture; Huître; Crassostrea gigas; Reproduction; Croissance; Bassin Arcachon; Gironde. |
| Ano: 1973 |
URL: http://archimer.ifremer.fr/doc/00009/11981/8685.pdf |
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| Goulletquer, Philippe. |
| Since its introduction to French coasts in the 1970s, Crassostrea gigas completes its reproductive cyclei.e. regular annual recruitment and establishment of natural populationsin only two sectors (Charentes coast and Arcachon Bay). In other areas of Pacific oyster production (Normandy, Brittany, Vendée, Mediterranean), complete gametogenesis may occur, resulting in spawning events and even recruitment in favourable temperatures. Temperature seems to be the main limiting factor for in situ reproduction. Growth and reproduction occur simultaneously. The study of the reproductive cycle of one-year old oysters showed that gametogenesis was asynchronous with high interannual variability and growth appeared to take precedence over reproduction. On the... |
| Tipo: Text |
Palavras-chave: Physiologie; Facteurs environnementaux; Cycle; Reproduction; Crassotrea gigas; Huîtres. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/acte-3209.pdf |
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| Le Moullac, Gilles; Tiapari, Jerome; Teissier, Hinano; Martinez, Elodie; Cochard, Jean-claude. |
| The growth and reproductive cycle of cultured black-lipped pearl oysters, Pinctada margaritifera (L.), were studied in the Gambier Islands (134°52' W, 23°07' S) from September 2002 to August 2003. Temperatures were recorded throughout the year, revealing seasonal temperature variations between 22.3 °C and 27.8 °C. The mean annual chlorophyll a value, as computed from satellite data, was 0.188 ± 0.075 µg L-1. To study growth and reproduction, 720 two-year-old individuals were ear hung on longlines suspended at a depth of 7 m. Samples were taken twice a month to obtain the following measurements: shell height; wet weight of flesh and total oyster; dry weight of adductor muscle, mantle and visceral mass; and glycogen content. Gonad development was also... |
| Tipo: Text |
Palavras-chave: Pearl oyster; Pinctada margaritifera; Growth; Reproduction; Temperature; Chlorophyll; Seasonality; Gambier archipelago. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00040/15099/13570.pdf |
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| Bennetau Pelissero, Catherine; Breton, Bernard; Bennetau, Bernard; Corraze, Genevieve; Le Menn, Françoise; Davail Cuisset, Blandine; Helou, Chantal; Kaushik, Sadasivam. |
| Three practical diets were formulated to contain 0, 500, or 1000 ppm genistein. The three diets were distributed for 1 year to groups of rainbow trout undergoing their first gametogenesis and until spawning. Growth performance of rainbow trout was not affected by dietary treatments. Plasma cholesterol levels were equivalent between groups. In males, a slight but constant induction of vitellogenin (VTG) synthesis and a decrease in testosterone levels were observed. A slight decrease in plasma levels of beta FSH and beta LH was noticed at the end of spermatogenesis in the male fish fed a diet with 500 ppm (genistein) (from 2.16 +/- 0.39 to 1.47 +/- 0.23 for beta FSH and from 0.44 +/- 0.09 to 0.31 +/- 0.09 for beta LH). There was a significantly reduced 17... |
| Tipo: Text |
Palavras-chave: Diet; Reproduction; GTH; Vitellogenin; Steroid; Trout; Genistein. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-738.pdf |
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| Aguirre-velarde, Arturo; Thouzeau, Gerard; Jean, Frederic; Mendo, Jaime; Cueto-vega, Rosa; Kawazo-delgado, Midori; Vásquez-spencer, Jazmín; Herrera-sanchez, Diego; Vega-espinoza, Alex; Flye-sainte-marie, Jonathan. |
| The response of Argopecten purpuratus (Peruvian scallop) to environmental conditions was studied in the upwelling-influenced Bay of Paracas (Peru). Scallops growth and reproduction were monitored weekly over a 7-month period under two conditions (culture depths): on the bottom and 2 m above (suspended culture). At the same time, a high-frequency environmental monitoring was realized at the aforementioned depths. The results indicate that environmental conditions in the Bay are highly variable, especially during the summer: temperature fluctuations up to 8∘C were recorded in less than one day while oxic conditions ranged from oversaturation to anoxia. Milky-turquoise waters discoloration events (sulphide presence suspected) were simultaneously observed... |
| Tipo: Text |
Palavras-chave: Argopecten purpuratus; High frequency monitoring; Coastal upwelling; Hypoxic/anoxic conditions; Growth; Reproduction; Aquaculture; Milky-turquoise water/aguas Blancas. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00504/61547/65430.pdf |
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| Mahony, Kate E.; Lynch, Sharon A.; Egerton, Sian; Laffan, Rebecca E.; Correia, Simão; De Montaudouin, Xavier; Mesmer‐dudons, Nathalie; Freitas, Rosa; Culloty, Sarah C.. |
| Reproduction and parasites have significant impacts on marine animal populations globally. This study aimed to investigate the associative effects of host reproduction and a host–parasite interplay on a marine bivalve, along a geographic gradient of latitude. Cockles Cerastoderma edule were sampled from five European sites (54°N to 40°N), between April 2018 and October 2019. A histological survey provided data on trematode (metacercaria and sporocyst life stages), prevalence, and cockle stage of gametogenesis to assess the influence of a latitudinal gradient on both interplays. Sex ratios at the northernmost sites were skewed toward females, and spawning size was reduced at the lower latitudes. Trematode infection did not follow a latitudinal gradient.... |
| Tipo: Text |
Palavras-chave: Boom and bust; Cockles; Fisheries; Latitude; Parasite–host interactions; Reproduction; Shellfish; Spatial variation; Trematodes. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00691/80352/83454.pdf |
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| Soletchnik, Patrick. |
| The Marennes-Oléron Bay on the Atlantic coast is a major oyster culture centre in France. 40 000 tonnes of cupped oysters are produced there each year. The two taxa C. angulata and C. gigas have been cultured in turn over the last century. Since 1950, larvae have been captured between June and September in the southern part of the Bay, near the mouth of the Seudre River, the traditional oyster spat capture zone. This historical database shows that the frequency of larvae capture is defined by three to four peaks in larvae emission in C. angulata and only two peaks for C. gigas during a single season. Seventeen years of data on C. angulata between 1950 and 1969 and 27 years for C. gigas between 1972 and 2000 demonstrate that the beginning of the spawning... |
| Tipo: Text |
Palavras-chave: Crassostrea angulata; Crassostrea gigas; Marennes Oléron bassin; Pertuis Charentais; Environnement; Huître creuse; Reproduction. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2008/rapport-4126.pdf |
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| Lambert, Louis. |
| Les mollusques et en particulier les huîtres ont de tout temps joué un rôle considérable dans l’alimentation humaine. Divers auteurs latins, d'autres, plus nombreux, du moyen âge, ont dit les mérites de nos huîtres indigènes qui paraient les tables les mieux servies. Pour les habitants de nos rivages les coquillages ont toujours été nourriture courante, mais la difficulté la longueur des transports ne permettaient pas de les expédier bien loin des côtes. L'exploitation des gisements naturels était la principale industrie, de nombreux auteurs disent la seule, mais à tort, car, dès le XIIIe siècle, la culture de la moule était pratiquée sur nos côtes du Centre Ouest ; un peu partout, les pêcheurs savaient installer des parcs sur les terrains baignés par la... |
| Tipo: Text |
Palavras-chave: Ostréiculture; Huître; Anatomie; Reproduction; Historique; Etablissement Ostréicole; Contrôle sanitaire. |
| Ano: 1936 |
URL: http://archimer.ifremer.fr/doc/00003/11463/8023.pdf |
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| Nikolic, Natacha; Puech, Alexis; Chouvelon, Tiphaine; Munschy, Catherine; Bodin, Nathalie; Brach-papa, Christophe; Potier, Michel; West, Wendy; Knoery, Joel; Zudaire, Iker; Dhurmeea, Zahirah; Degroote, Maxime; Cedras, Maria; Evano, Hugues; Bourjea, Jerome. |
| The GERMON project had several aims i) to understand the populations’ structure between albacore tuna southwest of the Indian Ocean and southeast Atlantic, ii) to determine the origin of juveniles observed in South Africa iii) to improve the understanding of the biology field (Size/Size and Size/Weight; reproduction and feeding area; trophic linkages) and iv) to initiate work on chemical analyzes and adaptation of the albacore species to its environment. These aims have been held and the results allow a better understanding of the management albacore. A general summary of results is presented in Part 9. |
| Tipo: Text |
Palavras-chave: Germon; Thunnus alalunga; Génétique; Stock; Structure; Connectivité; Chimie; Reproduction; Alimentation; Habitat; Albacore; Thunnus alalunga; Genetic; Stock; Structure; Connectivity; Chemical; Reproduction; Feeding behavior; Habitat. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00293/40461/39152.pdf |
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| Registros recuperados: 672 | |
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