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| Registros recuperados: 113 | |
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| Toupoint, Nicolas; Gilmore-solomon, Lisandre; Bourque, Francois; Myrand, Bruno; Pernet, Fabrice; Olivier, Frederic; Tremblay, Rejean. |
| We considered Cushing's match/mismatch theory in a heterotrophic environment and hypothesized that settlement and recruitment success in blue mussel are higher when the food supply is rich in polyunsaturated and essential fatty acids (PUFA/EFA). To test this hypothesis, we monitored larval development as well as fatty acid composition in trophic resources during two successive reproductive seasons. The decoupling we found between the presence of competent larvae in the water column and settlement rates strongly suggests that metamorphosis is delayed until conditions are suitable. In both years, the major mussel settlement peak was synchronized with a phytoplanktonic pulse rich in EFA, consisting of a large autotrophic bloom in 2007 and a short but... |
| Tipo: Text |
Palavras-chave: Fatty acids; Larval supply; Match/mismatch; Mytilus edulis; Picoeukaryotes; Recruitment; Settlement rate; Trophic settlement trigger. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00098/20923/19676.pdf |
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| Dickey-collas, Mark; Payne, Mark R.; Trenkel, Verena M.; Nash, Richard D. M.. |
| The use of modelling approaches in marine science, and in particular fisheries science, is explored. We highlight that the choice of model used for an analysis should account for the question being posed or the context of the management problem. We examine a model-classification scheme based on Richard Levins' 1966 work suggesting that models can only achieve two of three desirable model attributes: realism, precision, and generality. Model creation, therefore, requires trading-off of one of these attributes in favour of the other two: however, this is often in conflict with the desires of end-users (i.e. mangers or policy developers). The combination of attributes leads to models that are considered to have empirical, mechanistic, or analytical... |
| Tipo: Text |
Palavras-chave: Climate; Fisheries; GAM; Management; Prediction; Projection; Recruitment; Time-series analysis. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00222/33371/32179.pdf |
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| Paulet, Yves-marie; Bekhadra, Farida; Devauchelle, Nicole; Donval, Anne; Dorange, Germaine. |
| This work is part of the program, "recruitment determinism in scallops" initiated in 1992 by the "Contrat de Baie". The aim of this research was to explain interannual abundance fluctuations observed for Pecten maximus, in the Bay of Brest. To this end an analytical approach to the life cycle of the species was undertaken to determine its critical phases. A phase may be considered as "critical" if the mortality rate at its level varies from one year to the other. Using data from 1989 to 1994, a precise time-table of the "physiological year" of the scallop in the Bay of Brest was determined. Fecundity and gamete production kinetics were estimated from the annual variation in the weight indices of the gonad. In the laboratory, egg quality was estimated... |
| Tipo: Text |
Palavras-chave: Pecten maximus; Recruitment; Reproductive cycle; Digestion. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00044/15495/12861.pdf |
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| Pouvreau, Stephane. |
| La conchyliculture, et principalement l’élevage de l’huître creuse, Crassostrea gigas, constitue la principale activité aquacole française. Cette activité repose, en grande partie, sur le recrutement naturel de l’espèce qui assure 60 à 70% des besoins en jeunes huîtres (naissain) : cette activité de collecte s’appelle le captage. Les deux principaux centres de captage en France sont les bassins d’Arcachon et de Marennes-Oléron. Or, depuis une quinzaine d'années, sur le bassin d'Arcachon, le captage devient très variable: à des années de captage nul (par exemple 2002, 2005, 2007) ou faible (2009, 2010, 2011) succèdent des années excellentes voire pléthoriques (2003, 2006, 2008, 2012, 2014). A Marennes-Oléron, cette variabilité existe, mais s’avère beaucoup... |
| Tipo: Text |
Palavras-chave: Huître creuse; Naissain; Cycle de reproduction; Captage; Recrutement; Changement climatique; Larves; Pacific oyster; Spat; Recruitment; Seed collecting; Larvae; Reproductive cycle; Climate change. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00433/54427/55776.pdf |
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| Prou, Jean; Dardignac, Marie-jose. |
| Since 1979, the IFREMER Laboratory follows mussel recruitement in the Pertuis Breton. Gametogenesis generally begins in September or October and ends in Décember. Spawning may begin in Februrary and continues up ta the end of April, but it usually occurs in the second fortnigh of March. The most important settlement generaly runs after the middle of May up to the middle of June. Duririg the study period, four years are noticeable by lack of settlement : 1982, 1989, 1990 and 1991. This failure thraughout these three last years resulted in a breakdown of the cultivated biomass. The present paper outlines a preliminary analysis on the influence of temperature and sunshine. |
| Tipo: Text |
Palavras-chave: Mussels; Recruitment; Temperature; Sunshine; Pertuis Breton. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/00039/15064/12387.pdf |
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| Allain, Gwenhael; Petitgas, Pierre; Lazure, Pascal. |
| Variability in anchovy recruitment in Biscay is temptatively explained using variables from the stock and from the environment during the ichtyoplankton phase. Anchovy recruitment depends on many different processes : weight of adults and proportion of multiple spawners (age 2), river discharges, upwelling events at the coast and at the shelf break. Meteorological variables (wind, rain, tempe rature ) are forcing effects on the sea but they are not the effective processes that govern the production in the sea. So they do not relate directly to the survival of larvae and to recruitment. In Biscay, many different physical processes are active and used by anchovy which spawns in different physical systems (river plumes, open ocean enrichment systems).... |
| Tipo: Text |
Palavras-chave: Bio-physical coupling; Recruitment; Anchovy; Hdrodynamics; Step by step regression. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00391/50190/50814.pdf |
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| Pouvreau, Stephane; Petton, Sebastien; Queau, Isabelle; Haurie, Axel; Le Souchu, Pierrick; Alunno-bruscia, Marianne; Palvadeau, Hubert; Auby, Isabelle; Maurer, Daniele; D'Amico, Florence; Passoni, Sarah; Barbier, Claire; Tournaire, Marie-pierre; Rigouin, Loic; Rumebe, Myriam; Fleury, Elodie; Fouillaron, Pierre; Bouget, Jean-francois; Pepin, Jean-francois; Robert, Stephane; Grizon, James; Seugnet, Jean-luc; Chabirand, Jean-michel; Le Moine, Olivier; Guesdon, Stephane; Lagarde, Franck; Mortreux, Serge; Le Gall, Patrik; Messiaen, Gregory; Roque D'Orbcastel, Emmanuelle; Quemener, Loic; Repecaud, Michel; Mille, Dominique; Geay, Amelie; Bouquet, Anne-lise. |
| La conchyliculture, et principalement l’élevage de l’huître creuse, Crassostrea gigas, constitue la principale activité aquacole française. Cette activité repose, en grande partie, sur le recrutement naturel de l’espèce qui assure 70% des besoins en jeunes huîtres (naissain) : cette activité de collecte s’appelle le captage. Les deux principaux centres de captage en France sont les bassins d’Arcachon et de Marennes-Oléron. Or, depuis une dizaine d'années, sur le bassin d'Arcachon, le captage devient très variable: à des années de captage nul (par exemple les années 2002, 2005, 2007) ou faible (2009, 2010, 2011) succèdent des années excellentes voire pléthoriques (les années 2003, 2006, 2008, 2012, 2013). A Marennes-Oléron, cette variabilité existe, mais... |
| Tipo: Text |
Palavras-chave: Huître creuse; Naissain; Recrutement; Captage; Larves; Cycle de reproduction; Changement climatique; Pacific oyster; Spat; Recruitment; Spat collecting; Larvae; Reproductive cycle; Climate change. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00279/38990/37561.pdf |
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| Lapegue, Sylvie; Taris, Nicolas; Lallias, Delphine; Bonhomme, Francois; Boudry, Pierre. |
| The European flat oyster (Ostrea edulis L.) is a marine bivalve whose natural geographical distribution ranges along the European Atlantic coast from Norway to Morocco, in addition to the Mediterranean and Black Sea. The latest results obtained on the genetic differentiation between these populations have led us to persue studies at a finer scale, in order to estimate the effective number of breeders and the temporal dynamics of reproduction and, more specially, recruitment. Several experiments were performed to document (1) the variance in allele frequencies during a natural settlement period, (2) the paternal contribution to fertilization by analyzing larvae sampled at the brooding stage within individual females, (3) the variance of individual... |
| Tipo: Text |
Palavras-chave: Recruitment; Microsatellite markers; Ostrea edulis; European flat oyster; Genetic. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/acte-3485.pdf |
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| Rochette, S.; Rivot, Etienne; Morin, Jocelyne; Mackinson, S.; Riou, Philippe; Le Pape, Olivier. |
| Estuaries and coastal waters are essential nursery habitats for many marine species, and especially for flatfishes. Thus, investigating how anthropogenic disturbances affect the quality of these habitats is of major importance to understand their consequences on the population renewal of marine species. The aim of the present study was to analyse the effects of estuarine habitat degradation on the population of the common sole in the Eastern Channel, a key species in the fish community and fisheries in this area. We especially focused on the drastic drop in the surface area and on the low water quality of the Seine estuary, the main river of the Eastern Channel. A geographic Information System (GIS) was used to develop quantitative maps of sole nursery... |
| Tipo: Text |
Palavras-chave: Solea solea; Nursery; Habitat Mapping; Anthropogenic Disturbance; Seine Estuary; Recruitment. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00008/11921/9799.pdf |
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| Bauer, Robert Klaus; Stepputtis, Daniel; Graewe, Ulf; Zimmermann, Christopher; Hammer, Cornelius. |
| The investigation of larval dispersal and retention, their variability and dependence on wind conditions, has become a major topic in fisheries research owing to potential effects on stock recruitment and stock structuring. The present study quantifies the wind-induced variability of larval retention of herring in a highly productive coastal lagoon of the Western Baltic Sea. This lagoon, the Greifswalder Bodden, represents the main spawning area of Western Baltic Spring-Spawning Herring, a stock that has recently undergone a continuous decline in recruitment. The study tests whether this decline was related to changes in larval retention, more precisely to changes in wind conditions, the main forcing of the lagoon's circulation. To answer this, a model... |
| Tipo: Text |
Palavras-chave: Atmospheric forcing; Baltic Sea; Biophysical modelling; Greifswalder Bodden; Herring; Larval retention; Recruitment; Spring spawners. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00151/26224/24408.pdf |
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| Desprez, M; Ducrotoy, J; Elkaim, B. |
| In this paper, the results collected since 1978 on the cockle (Cerastoderma edule) in the Bay of Somme have been recapitulated. A synthesis is brought up about causes of the bivalve population collapse which was portended as early as 1982 from the animal cinetics study. In order to back up the discussion, the main results dealing with the biology and ecology of the species are recalled in illustrated form. A review of the international literature leads to a comment upon the diagrams. A comparison with data from European estuaries tends to take climatic and oceanic disturbances into account as well as local pollution such as eutrophication which is probable on the littoral of Picardy. |
| Tipo: Text |
Palavras-chave: Clam fisheries; Stock assessment; Recruitment; Population dynamics; Marine mollusks. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/publication-1783.pdf |
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| Registros recuperados: 113 | |
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