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Registros recuperados: 8
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Approche de l'activité de prédation de l'huître creuse Crassostrea gigas par les bigorneaux perceurs Ocenebra erinacea et Ocenebra inornata. Régulation des populations de perceurs Ocenebra erinacea et Ocenebra inornata : survie vis-à-vis des températures négatives et action du brûlage sur des pontes naturelles ArchiMer
Robert, Stephane; Grangere, Karine; Amiot, Jean-baptiste; Le Moine, Olivier; Soletchnik, Patrick; Guilpain, Patrice; Seugnet, Jean-luc; Geairon, Philippe; Goulletquer, Philippe; Razet, Daniel; Faury, Nicole; Garcia-meunier, Pascale; Martel, C..
Parmi les problèmes qui handicapent la production du bassin, la surexploitation du milieu trophique est souvent mise en référence (Bacher 1989, Héral, 1991) de la même façon des mortalités importantes sont régulièrement enregistrées principalement en période estivale Lodato M.I., 1997, Goulettquer, 1998, Soletchnick, 1998, 2000. Depuis la fin des années 1990 la prédation par bigorneaux perceurs est un problème important régulièrement signalé par les professionnels, au point que la section régionale a organisé un ramassage collectif des perceurs en avril 2001 . Ce problème n' est pas nouveau, dans les années 30, la prédation par Ocenebra erinacea était enregistrée pour ses ravages sur les bancs d'élevage de La Rochelle, Bourgneuf ou Arcachon (Robert S., et...
Tipo: Text Palavras-chave: Bigorneaux perceurs; Ocenebra erinacea; Ocenebra inornata; Huître creuse; Crassostrea gigas; Prédation.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00077/18791/16367.pdf
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Effets directs et indirects de la pêche sur des groupes trophiques de poissons démersaux, définis par une approche écomorphologique ArchiMer
Reecht, Yves.
Functional groups dynamics in marine communities help understanding how perturbations impact the functioning of an ecosystem. It is notably expected that functional groups respond differently to fishing pressure owing to their direct exposure to fishing and interactions between groups (indirect effects). A method was developed, based on an ecomorphological approach focusing on predation functions, to define size- and taxonomy-driven functional groups in demersal fish communities from the Celtic Sea and the North Sea. Eleven functional traits were used to define 12 functional groups in Celtic Sea (based on measurements on 930 individuals from 33 species) and seven groups in North Sea (710 individuals from 22 species). In the Celtic Sea, the functional...
Tipo: Text Palavras-chave: Fonctions trophiques; Prédation; Écomorphologie; Groupes fonctionnels; Effets de la pêche; Approche écosystémique; Poissons; Communautés démersales; Trophic functions; Predation; Ecomorphology; Functional groups; Fishing effects; Ecosystem approach; Fish; Demersal communities.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00006/11687/8359.pdf
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Élevage de la palourde japonaise Ruditapes philippinarum dans le bassin d'Arcachon. Bilan des dix dernières années et perspectives de développement ArchiMer
Robert, Rene; Deltreil, Jean-pierre.
Farming of the Japanese clam Ruditapes philippinarum took place for the first time in 1980 in the Arcachon basin. After an experimentation period of about ten years, a farming strategy, taking into consideration the distinctive features found in the bay, was able to emerge. For example, in order to fight against clam predators, crabs such as Carcinus maenas, and balistes such as Balistes capriscus, vertical protection coupled with prior ground gravelling, and laying of nets over the beds during the summer months, have become necessary. The best raising technique seems to rest on early spring planting of middle size spats (T5), after checking that no brown rings are visible. If clam growth seems to be better in oceanic zones, it looks similar in other areas...
Tipo: Text Palavras-chave: Basin of Arcachon; Culture methods; Growth; Predation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum; Bassin d'Arcachon; Stratégie d'élevage; Croissance; Prédation; Balistes capriscus; Carcinus maenas; Ruditapes philippinarum.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/rapport-1652.pdf
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Etude expérimentale de la prédation de la palourde japonaise, Ruditapes philippinarum, par la dorade royale, Sparus aurata, et le baliste, Balistes capriscus ArchiMer
Robert, René; Parra, René.
Depuis 1988, d'importantes mortalités de palourdes japonaises Ruditapes philippinarum ont été enregistrées, sur de nombreux élevages, dans le bassin d'Arcachon. Pour expliquer celles-ci, l'hypothèse d'une prédation par la dorade royale Sparus aurata et par le baliste Balistes capriscus était avancée. Afin de la vérifier, une étude expérimentale de la prédation de la palourde par ces deux poissons a été réalisée en laboratoire. Si les relations taille prédateurs-taille proies sont plus marquées chez le baliste, les deux espèces sont particulièrement voraces, puisqu'elles s'avéraient capables de consommer, en 24 h, 500 petits naissains et 350 jeunes palourdes de 25 mm de longueur, 50 % à 70 % des proies étant consommés au cours des 6 premières heures....
Tipo: Text Palavras-chave: Sparus aurata; Balistes capriscus; Ruditapes philippinarum; Palourde; Prédation; Comportement alimentaire; Sparus aurata; Balistes capriscus; Ruditapes philippinarum; Manila clam; Predation; Feeding behaviour.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00015/12601/9479.pdf
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Evidence of heavy predation by Noctiluca scintillans on Acartia clausi (Copepoda) eggs off the central Cantabrian coast (NW Spain) ArchiMer
Quevedo, M; Gonzalez-quiros, R; Anadon, R.
A large proliferation of Noctiluca scintillans (Dinophyceae: Noctilucidea) was observed in neritic waters off the central Cantabrian coast during late April 1995. Eggs of Acartia clausi (Crustacea: Copepoda) were the most conspicuous prey within vacuoles of Noctiluca. Noctiluca ingested 73 % of the total stock of A. clausi eggs. This intense predation on copepod eggs could potentially affect the recruitment of nauplii. The potential impact on the stock of Acartia clausi eggs and on the daily egg production of the population is discussed. There is a negative correlation between the average number of ingested eggs by a single Noctiluca cell and the abundance of Noctiluca. This fact, coupled with the lack of significant correlation between the former variable...
Tipo: Text Palavras-chave: Noctiluca; Acartia; Œufs de copépode; Prédation; Golfe de Gascogne; Noctiluca; Acartia; Copepod eggs; Predation; Bay of Biscay.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43633/43232.pdf
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Les risques conchylicoles en Baie de Quiberon. Deuxième partie : le risque de prédation sur l’huître creuse Crassostrea gigas. Rapport final du projet Risco 2010-2013 ArchiMer
Mazurie, Joseph; Stanisiere, Jean-yves; Bouget, Jean-francois; Langlade, Aime; Leclerc, Emilie; Quinsat, Kevin; Herve, Gilles; Augustin, Jean-marie; Ehrhold, Axel; Sinquin, Jean-marc; Meidi-deviarni, Ika; Goubert, Evelyne; Cochet, Helene; Dreano, Alain.
This study (“Risco”), implicating both industry, socio-economic experts and biologists, was funded by the Regional Council of Brittany, for 3 years (2010-2012), to investigate about the causes of oysters (Crassostrea gigas) mortalities in the bay of Quiberon (South Brittany, France). The protocol including both a sonar and video visualization of the bottom, and a monthly survey of 15 experimental oyster structures, allowed to assess the risk due to predation. A clear spatial distribution of the predatory effect was evidenced, with starfish (Asterias rubens and Marthasterias glacialis) predominating in the North-East sector, and boring snails (Ocenebra erinacea and Pterophora inornata) in the South-Center area.. The main mortalities from these predators...
Tipo: Text Palavras-chave: Baie de Quiberon; Huître; Crassostrea gigas; Risque; Mortalité; Prédation; Étoiles de mer; Bigorneaux perceurs; Risco; Bay of Quiberon; Oyster; Crassostrea gigas; Risk; Mortality; Predation; Starfish; Oyster drills; Risco.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00180/29130/27534.pdf
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Performances d'élevage de la moule (Mytilus edulis) en Manche/Atlantique. Recensement et interprétation. 1 : Synthèse et rapport ArchiMer
Rodriguez, Julien.
The objective of this study is to explain the decrease in mussel production, along the French coasts of Atlantic and the English Channel, through existing data and additional inquiries. This decrease in 2010 and 2011 had two components : a growth deficit and losses of mussels, due to detachment and mortality. Both inter-annual and geographic differences in rearing yields seem to be linked to phytoplankton abundance and turbidity. In 2011, severe droughts have impacted the level of rivers effluents to marine, limiting nutrients inputs. In 2010, frequent winds from east seem to have maintained the phytoplankton blooms away from the coasts. Detachment and mortalities of mussels might be due to physiological stress or weakening linked to poor environmental...
Tipo: Text Palavras-chave: Mytiliculture; Bouchots; Moule; Mytilus edulis; Performances d’élevage; Bassins conchylicoles; Croissance; Décrochage; Mortalité; Byssus; Prédation; Réseaux; Sécheresse; Régimes de vents; Mussel farming; Bouchot; Mytilus edulis; Growth; Mortality; Byssus; Detachment; Meteorological conditions.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00142/25341/23422.pdf
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Prédation par les limicoles de la macrofaune intertidale en baie de Saint-Brieuc. Projet EUPHORBE. ArchiMer
Annezo, Jean-pierre; Hamon, Dominique.
The object of this report is to provide an estimation, on an annual basis, of the macrozoobenthic biomass consumed by the major wading birds staying in the bay of Saint-Brieuc (Brittany, Western Channel). Historical information was first reviewed and then updated throughout the winter 1987-88, by field observations (counts of birds, birds activities ... ). Six species account for most of the predation on macrofauna, and are thus studied with more detail. A specific survey is devoted to oystercatcher (Haematopus ostralegus), because of its feeding on an exploited stock of the edible cockle (Cerastoderma edule).
Tipo: Text Palavras-chave: Limicoles; Prédation; Macrofaune benthique; Baie de St Brieuc; Waders; Predation; Macrozoobenthos; Bay of St Brieuc.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/00107/21824/19412.pdf
Registros recuperados: 8
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