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| Registros recuperados: 26 | |
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| Bacher, Cedric; Deslous-paoli, Jean-marc; Heral, Maurice; Prou, Jean. |
| The expansion of shellfish culture businesses (oysters, mussels, clams...) gives way to a competition for the use of limited food resources, especially in the Marennes-Oléron basin where water circulation is slow. Increasing the amount of cultivated molluscs leads, from a biological point of view, to:- a drop in growth performances- a rise in chronic mortalities, higher and higher, due to a weakness in the physiological state with a lack of stocks which would have compensated the habitat seasonal shortages (end of winter, etc...)- a greater weakness to diseases, linked to a deficient physiological state and a density rise which increases the proximity rate and thus, parasite propagation speed.For these primary reasons, and for the future of oyster culture,... |
| Tipo: Text |
Palavras-chave: Modélisation; Estimation; Echantillonnage; Mollusques; Marennes Oléron; Evaluation stocks. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1986/rapport-3841.PDF |
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| Pelletier, Dominique; Beucher, Helene; Chevalier, Robert; Laurec, Alain; Alperi, J.; Pereda, P.; Guichet, Roger; Dupouy, Herve; Peronnet, Isabelle. |
| The aim of the project "rationalization of biological sampling for stock assessment of marine fisheries in the bay of Biscay" is to perform statistical methods and computer programs allowing to test prognoses and diagnoses based on estimates of fishing mortalities, recruitments, yields per recruit, and the "gain-loss" function. The project gathers the laboratories of the community working on the Bay of Biscay fisheries, namely - Santander in Spain (1. E. 0) - La Rochelle and Lorient in France (IFREMER). A descriptive study has been carried out. The prepared documents contain a description of the procedures used to collect the information, by each of the laboratories involved, on: - landings - biological samplings. More comprehensive data have been gathered... |
| Tipo: Text |
Palavras-chave: Capture; Marine biology; Fisheries; Megrim; Monk; Hake; Data collection; TAC; Bay of Biscay; Stock assessement; Sampling; Statistics; Capture; Biologie marine; Halieutique; Cardine; Baudroie; Merlu; Collecte de données; TAC; Golfe de Gascogne; Evaluation des stocks; Echantillonnage; Statistiques. |
| Ano: 1991 |
URL: http://archimer.ifremer.fr/doc/1991/rapport-3621.pdf |
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| Mazurie, Joseph. |
| Les stratégies d'échantillonnage mises en oeuvre à l 'IFREMER dans le domaine du contrôle de la qualité des produits et du milieu conchylicoles, le long du littoral et dans les installations à terre sont analysées . En outre, les plans d'échantillonnage pour la gestion des cheptels, l'estimation des stocks, de la production biologique, des ventes et des transferts inter-bassins et de l'état zoosanitaire, sont discutés . |
| Tipo: Text |
Palavras-chave: Echantillonnage; Conchyliculture. |
| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00424/53538/54394.pdf |
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| Gangnery, Aline. |
| In Thau Iagoon (Mediterranean Sea), shellfish are cultured in suspension. Molluscs are reared on ropes that are suspended on frames. Principal species concerned by breeding are Crassostrea gigas, Mytilus galloprovincialis and, in a less extent, Ostrea edulis. A new sampling method was developped to assess the total stock of cultured shellfish and was tested in July 1998 and April 1999. The total stock was found to be 19500 tons (± 1120 SE) in 1998 and 14100 tons (± 830 SE) in 1999, thus exhibiting temporal variations. Temporal differences in the total stock are mainly attributable to the breeding cycle but also to sorne exceptionnal events which occurred in Thau lageon in 1997 and 1998 (water anoxia, bacteriological crisis, bloom of toxic algae). In the... |
| Tipo: Text |
Palavras-chave: Etang de Thau; Bivalves; Echantillonnage; Dynamique; Modèle; Epibiontes. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00443/55478/57008.pdf |
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| Le Moine, Olivier; Geairon, Philippe; Razet, Daniel. |
| La connaissance des stocks en élevage est un élément important de gestion de la ressource. L'appréciation de l'adéquation entre la disponibilité trophique du milieu et la biomasse d'animaux filtreurs rend ces évaluations indispensables. Dans le cadre de la gestion des écosystèmes conchylicoles côtiers, le stock en place est un élément clé, ainsi que sa variabilité spatiale; les performances de croissance et de mortalité (rendements biologiques), sont également des données nécessaires à une gestion rationnelle. Le Laboratoire Conchylicole de Poitou-Charentes de L'IFREMER, effectue un suivi de ces différentes variables. Les données de croissance pour les huîtres ainsi que la variabilité temporelle des réserves des huîtres sont suivies à travers le réseau... |
| Tipo: Text |
Palavras-chave: Mytilicutlure; Estimation stock; Taux occupation; Tonnage; Echantillonnage; Pertuis Charentais. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/00095/20612/18247.pdf |
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| Le Moine, Olivier; Geairon, Philippe; Razet, Daniel. |
| La connaissance des stocks commercialisables est un atout dans la gestion de la campagne de commercialisation. L'Organisation des Producteurs d'huîtres de Marennes Oléron, consciente des avantages que serait cette connaissance de manière précoce, a donc demandé à l'IFREMER, lors de la contractualisation profession - IFREMER 2001, de mettre au point une technique qui permettrait d'acquérir ces données de façon aussi simple et précise que possible. Les évaluations de stocks conchylicoles sont une des missions que les laboratoires côtiers de l'IFREMER accomplissent de manière périodique, tous les cinq ans à Marennes Oléron. L'année 2001 est celle de l'échantillonnage exhaustif à Marennes Oléron, opérée par le Laboratoire Conchylicole de Poitou-Charentes. Il... |
| Tipo: Text |
Palavras-chave: Stocks conchylicoles; Echantillonnage; Typologie; Evaluation; Marennes Oléron bassin; Charente-Maritime. |
| Ano: 2002 |
URL: http://archimer.ifremer.fr/doc/00031/14242/11517.pdf |
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| Bertrand, Jacques; Biais, Gerard; Taquet, Marc. |
| The follow-up of the activity of the boats practising offshore fishing in the North-West of the La Réunion Cbaies of the Possession and Paul Saint) was carried out over one year(April 86 - March 87) thanks to the application of a strategy of sampling allowing the collection of the following statistics: total effort and by machine, captures total and by species.The study allowed a first approach of the space-time distribution of the activity of the fleet. It reveals the very high participation of the yachtmen in the halieutic exploitation of the studied sector. It also highlights the importance of tunas in the captures, which in weight are largely majority. |
| Tipo: Text |
Palavras-chave: La Réunion; Echantillonnage; Petite pêche; La Réunion; Sampling; Small fishing. |
| Ano: 1987 |
URL: https://archimer.ifremer.fr/doc/1987/rapport-1584.pdf |
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| Jeanneret, Hélène; Kopp, Joel; Joly, Jean-pierre; Moriceau, Jacques; Legagneur, Eric. |
| Une approche socio-économique a permis de classer en 5 catégories les exploitations conchylicoles de la côte est du Cotentin. Parallèlement, une stratégie d'échantillonnage a été mise au point dans cette zone. Dans chacune des 20 strates, la densité des poches et la composition du stock (naissain , 18 mois, ... ) ont été évaluées, ce qui a permis d'estimer à 12 900 tonnes le stock d'huîtres en élevage en 1989 et 1990. |
| Tipo: Text |
Palavras-chave: Ostréiculture; Stocks; Crassostrea gigas; Est Cotentin; Exploitations conchylicoles; Echantillonnage. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00092/20361/18022.pdf |
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| Bodoy, Alain; Morin, Jocelyne. |
| We analysed a few aspects of oyster culture in New Caledonia. Oyster culture there is not very important, one farm producing 30 tonnes of Japanese oysters per year and the other one, 3 tonnes of rock oysters. Mangrove oyster deposits are traditionally exploited, and this exploitation lead to a decrease of the densities and biomasses observed in the most exploited estuaries. On the four monitored sites, the maximum size observed is comprised between 7.2 to 10 cm, for a mode comprised between 3.6 and 4.8 cm. Densities go from 31 to 251 oysters and biomasses, from 0.751 to 2.553 kg/m2. Regulations focus on the minimum collection size (6 cm) and a fishing prohibition period of 8 months. Based on our observations, we suggest that these dispositions be... |
| Tipo: Text |
Palavras-chave: Aménagement des Pêches; Stocks; Echantillonnage; Huître; Mangrove. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/acte-6527.pdf |
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| Registros recuperados: 26 | |
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