Consulta: subjectFacets:"Recrutement"
Registros recuperados: 42
Data/hora: 11/06/2024 01:13:26

Influence du climat sur le recrutement et sur la production d'huîtres cultivées (Crassostrea angulata et Crassostrea gigas) dans le bassin de Marennes-Oléron (France)
Provedor de dados: 5
Autores: Heral, Maurice; Deslous-paoli, Jean-marc; Prou, Jean.
Recruitment, marketed yield and cultivated biomasses of oysters Crassostrea angulata and Crassostrea gigas are compared to climatic indices for the period 1885-1984. Temperature plays a role up on the date of spawning but explains only partially the failure of recruitment, which has less influence on the marketed yield than on the total biomass Contrary to the sensitivity of wild molluscan stocks to climatic conditions, yield and biomass of these cultivated stocks are not hightly correlated to the annual and seasonal indices of rainfall and air temperature.
Tipo: Text
Palavras-chave: Marennes Oleron Bay; Climatic conditions; Recrutment; Crassostrea gigas; Crassostrea angulata; Oysters; Marennes Oléron; Facteurs climatiques; Recrutement; Crassostrea gigas; Crassostrea angulata; Huîtres.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/acte-2972.pdf

Biologie et écotoxicologie des véligères de Crassostrea Gigas (Thunberg) dans le bassin d'Arcachon
Provedor de dados: 5
Autores: His, Edouard.
This study analyses the larval recruitment and biology in Crassostrea Gigas, in the Arcachon Bay. Three types of observations were conducted: - a study of the reproduction anomalies in C. gigas between 1976 and 1981. - observations of the particulate nutrition of the veligeres. - ecotoxicologic experiments (organostannic action on oyster reproduction, mostly). The reproduction anomalies in C. gigas could not be attributed to either the genitors' quality or the water quality in the Arcachon Bay, but to a perturbation of the veligeres' trophic regime; the hypothesis of an alteration of the nanoplancton in the Bay, during the summer period, and linked to the action of the organotins is highly considered. The assumption of responsibility of the particulate...
Tipo: Text
Palavras-chave: Organostanniques; Ecotoxicologie; Nutrition; Anomalies de la reproduction; Bassin d'Arcachon; Crassostrea gigas; Véligères; Recrutement.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/these-3347.pdf

Modélisation de la distribution d’espèces benthiques par l’utilisation d’une plateforme multi-agents
Provedor de dados: 5
Autores: Razafimahefa, Ntsoa Rakoto.
In a context of climate change, understanding the response of species to changes in the environment and the implications for their geographic distribution is paramount. Species distribution models (SDM), through the formulation of relationships between the organism and its environment, provide a tool to explore species response to different types of environmental stresses. This study presents the development and a first application of a mechanistic and generic SDM, using a multi-agent modelling platform: NetLogo. The model allows to simulate the spatialized population dynamic of a bentho-pelagic species, in response to environmental variations. The model developed is an individual-based (IBM) mechanistic model, which incorporates a DEB (Dynamic Energy...
Tipo: Text
Palavras-chave: Modèle de distribution d’espèce; Mytilus edulis; Dynamic Energy Budget; Connectivité; Recrutement; Compétition spatiale; Scénario de changement climatique; Species distribution model; Mytilus edulis; Dynamic Energy Budget; Connectivity; Recruitment space-limited recruitment; Climate change scenario.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00405/51631/52187.pdf

Effets climatiques sur les écosystèmes marins. Exemple du recrutement des Crustacés Cirripèdes sur la côte ouest du Cotentin
Provedor de dados: 5
Autores: Dreves, Luc.
A nuclear power plant is set up at Flamanville (Channel; West coast of the Cotentin). For monitoring studies, one species (or a group of species) has been chosen in each major unit for a reference population dynamics study. Hard bottoms are covered by several species of barnacles. These species present different temperature affinities, and have reached here an equilibrium stage. The recruitment period of Balanus balanoides, the main species, has been determined. A relationship is established between the wintry temperature and the numerical importance of its spring recruitment.
Tipo: Text
Palavras-chave: Centrale nucléaire; Flamanville; Surveillance; Crustacés cirripèdes; Balanus balanoides; Recrutement; Flamanville; Monitoring; Nuclear power plant; Balanus balanoides; Barnacles; Recruitment.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00396/50759/51472.pdf

Diversité génétique et dynamique du recrutement chez l'huître plate Ostrea edulis L. (2003)
Provedor de dados: 5
Autores: Lapegue, Sylvie; Taris, Nicolas; Boudry, Pierre; Langlade, Aime; Bonhomme, Francois.
Le milieu marin est un milieu difficile à appréhender car composé d'un ensemble d'organismes et d'écosystèmes caractérisés par des conditions de fonctionnement tout à fait originales et souvent difficiles d'accès. Ces spécificités peuvent être attribuées à la structure spatiale du milieu marin, qui à bien des égards, diffère du milieu terrestre. En effet si les notions de barrières géographiques sont une réalité concrète pour les organismes terrestres, elles restent rarement identifiées en milieu marin (PALUMBI 1994). Dans un tel environnement, les organismes présentent des cycles de vie souvent mal connus, notamment ceux qui associent phase benthique et phase planctonique. L'étude de la structure génétique des populations, dans un espace aussi ouvert aux...
Tipo: Text
Palavras-chave: Diversité génétique; Génétique; Recrutement; Génotypage; Variabilité génétique; Huître plate; Ostrea edulis.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00044/15478/12857.pdf

Modelling and numerical simulations of larval migration of the sole (Solea solea (L.)) of the Bay of Biscay. Part 1: modelling
Provedor de dados: 5
Autores: Ramzi, Azeddine; Arino, Ovide; Koutsikopoulos, Constantine; Boussouar, Ahmed; Lazure, Pascal.
A spatio-temporal model describing the dynamics of a population of sole is presented. The model is an extension to a 2D-space structure of a 1D model published by the three first authors. Spatial migration is modelled by an advection-diffusion second order operator with constant coefficients. The physical domain is represented by a half-plane with the coast as its boundary. A formula for estimating the proportion of eggs reaching the juvenile stage, depending upon climatic, transport, growth and mortality processes, is derived. Numerical results are deferred to elsewhere.
Tipo: Text
Palavras-chave: Recruitment; Diffusion and advection processes; Population dynamics; Recrutement; Processus de diffusion et d'advection; Dynamique de population.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2001/publication-531.pdf

Déterminisme du recrutement de la sole. Phase pélagique - Résultats des campagnes 1985
Provedor de dados: 5
Autores: Arbault, Suzanne; Camus, Patrick; Hersart De La Villemarque, Jacqueline; Koutsikopoulos, Constantin.
In order to analyse the recruitment process of a commercial fish, the common sole has been selected for making researches into the mecanisms which have an effect upon the distribution of the young fish stages and upon the plenty of the recruitment. In 1985, during three surveys for eggs and larvae off the estuary of the river Loire in march and april, severa! points have been studied : - physical and chemical data of the sea - distribution of eggs and larvae - vertical distribution of larvae in a little scale - some results on nutrition of larvae.
Tipo: Text
Palavras-chave: Sole; Oeufs; Larves; Recrutement; Sole; Eggs; Larvae; Recrutment.
Ano: 1986
URL: https://archimer.ifremer.fr/doc/00503/61493/65304.pdf

Etude bio-économique de l'exploitation des ressources sous diverses hypothèses de gestion
Provedor de dados: 5
Autores: Biseau, Alain; Ould El Kettab, Mustapha.
The model developed is a multi-species, multi-fleet and multi-sector model that consists of a dynamic allocation of the fishing effort. It can therefore measure the amplitude of the effort's generated outputs by strict, implemented and honoured regulatory measures. The management measures likely to be simulated give an account of the main trends of the regulations in effect in Community waters. Their effects on both the resource and the fleets are evaluated. Each stock, confined or not to a sector, has its own dynamic described by a model structured by ages: recruitment is assumed to be constant. Biological interactions (intra- and inter-species contact) as well as the problems of exchanges between sectors are not taken into account. In order to treat the...
Tipo: Text
Palavras-chave: Dynamique des stocks; Eaux communautaires; Recrutement; Activité des flottilles; Mesures reglementaires; Gestion de la ressource; Modèle biologique.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/rapport-2578.pdf

Reproduction and growth of the deep-sea brittlestar ophiura-ljungmani (lyman)
Provedor de dados: 5
Autores: Tyler, Pa; Gage, Jd.
Reproductive biology and population dynamics of Ophiura Ijungmani were studied by measuring disk diameters and by examining oocyte size-frequencies and fecundity from a sequential seasonal series of large samples from a 2900 m deep Permanent Station in the Rockall Trough (Northeast Atlantic). Egg size (max. 90 !lm) and fecundity (up to 57000 eggs per individual) suggests indirect planktotrophic development, while a clear annual cycle in gametogenesis, with probably synchronous spawning in JanuaryFebruary, confirms a marked seasonality that is also seen as an annual, summertime set of postlarvae on to the bottom. Analysis of size structure of the population indicates annually discrete year classes with a maximum longevitv of around 10 years. lndividuals...
Tipo: Text
Palavras-chave: Ovocytes; Fécondité; Structure de la répartition des classes de tailles; Recrutement; Capacité de survie; Oocytes; Fecundity; Population structure; Recruitment; Survivorship.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00323/43424/43087.pdf

Description, évolution et importance des différentes techniques de captage en rivière Seudre (bassin de Marennes-Oléron) : incidence sur la production d'huîtres creuses C. gigas
Provedor de dados: 5
Autores: Berthome, Jean-paul; Razet, Daniel; Garnier, Jacqueline.
Dealing with the study of the oyster stocks in Marennes Oleron basin, a method is set up to study oystr origin. Various collectors, factory-made or hand-made (about 90% of the whole) are described. Technical evolution, bound to the importance of potential catching in three concerned districts depands on the catching ability of the different types of collectors. The catching, achieved in the Seudre river, represents nearly 1 400 million units, wich is a theorical potentail quantity of 30 000 tons of adults oysters
Tipo: Text
Palavras-chave: Larvae; Recrutment; Crassostrea gigas; Oysters; Oyster stock; Technique captage; Recrutement; Crassostrea gigas; Huîtres; Evaluation stocks.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/acte-2935.pdf

Influence des facteurs climatiques sur la production conchylicole du bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Heral, Maurice; Prou, Jean; Deslous-paoli, Jean-marc.
The authors are comparing the recruitment, the commercialised production, the cultivated biomasses of oysters Crassostrea gigas and Crassostrea angulata  with the statistics of the meteorology (1885-1984). The temperature plays a role up on the date of spawning but partialy explains the lack of recruitment, which has less impact on the commercialised production than on the total biomass. The annual and seasonal characteristics of the precipitations and water temperatures do not show tight correlations with the variations of the production and of the biomass, for these cultivated populations in opposition with the sensitivity of the natural molluscan populations towards the climatic factors.
Tipo: Text
Palavras-chave: Meteorology; Recruitment; Biomass; Production; Crassostrea angulata; Crassostrea gigas; Météorlogie; Recrutement; Biomasse; Production; Crassostrea gigas; Crassostrea angulata.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-2968.pdf

Les différents systèmes de collecteurs de naissain
Provedor de dados: 5
Autores: Boury, Maurice.
Le naissain est récolté sur des matériaux très variés : pierres, coquilles, bois, tuiles non chaulées, tuiles chaulées. De plus, le même matériel peut être disposé de façons différentes. Exemple : coquilles étalées sur le fond et coquilles assemblées en chapelets et suspendues dans l'eau.
Tipo: Text
Palavras-chave: Huître; Reproduction; Naissain; Collecteur; Recrutement.
Ano: 1929
URL: http://archimer.ifremer.fr/doc/00005/11586/8212.pdf

Simulation of a coastal jet retention process using a barotropic model
Provedor de dados: 5
Autores: Penven, Pierrick; Roy, Claude; Colin De Verdiere, Alain; Largier, John.
In the southern Benguela, sardine and anchovy spawn on the Western Agulhas Bank. Eggs and larvae are transported to the West coast nursery ground by a! coastal current. Once the larvae reach the West coast, retention within the favorable coastal domain is key to larvae survival and recruitment. The Cape Columbine-St Helena Bay area is the main nursery ground along the West Coast. In this area, the interaction between upwelling and topography results in the formation of an upwelling plume. The plume, and the associated circulation patterns, is thought to be the mechanism providing retention within the coastal domain. The dynamics of the plume are studied using a set of:numerical experiments. It is shown that an equatorward wind forcing produces a cyclonic...
Tipo: Text
Palavras-chave: Benguela; Effets de cap; Modélisation; Rétention; Recrutement; Benguela; Cape effects; Modeling; Retention; Recruitment.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00323/43385/42826.pdf

Les bouchots à Mytilus edulis Linnaeus dans l'écosystème estuarien du bassin de Marennes-Oléron (France): aspects biologique et bioénergétique
Provedor de dados: 5
Autores: Boromthanarat, Somsak.
L'étude des moules de bouchots, Mytilus edulis L. a été réalisée pour caractériser les phénomènes biologiques et leur importance énergétique dans le bassin de Marennes-Oléron. Le suivi hydrobiologique a montré que la nourriture disponible pour les moules est plus abondante du printemps au début de l'été. Il a été possible de mettre en évidence une compétition spatiale extrêmement forte, au niveau intraspécïfique. Les moules cultivées à partir du transfert des naissains collectés sur cordes poussent plus rapidement que celles provenant d'une fixation directe du naissain sur les bouchots. La période de ponte est étalée entre février et  mai d'où l'existence de recrutement en juin. On peut proposer comme période de pêche, une saison allant de juin à novembre,...
Tipo: Text
Palavras-chave: Mytiliculture; Mytilus edulis; Production; Recrutement; Composition biochimique; Indice de qualité; Bilan énergétique.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00441/55215/56689.pdf

Renewal and accumulation of a Lanice conchilega (Pallas) population in the bale des Veys, western Bay of Seine
Provedor de dados: 5
Autores: Ropert, Michel; Dauvin, Jean-claude.
Since the mid-1980s, an increase in abundance of the annelid polychaete Lanice conchilega (Pallas) (Annelida: Polychacta, Terebellidae) has been observed in the Bay des Veys (western Bay of Seine). The first particularity of this population is that it is strictly limited to the eastern side of the bay, in an oyster aquaculture area. Its proliferation (over 7 000 ind.m(-2)) has had a significant impact on the local aquaculture. Several studies have been carried out since 1993; monthly monitoring of population densities and size structure has demonstrated the lack of significant juvenile recruitment between 1993 and 1996. In terms of geographical occupation, maps of population spatial distributions were drawn in 1995 and 1998. They showed an increase in...
Tipo: Text
Palavras-chave: Adult transport; Renewal; Accumulation; Lanice conchilega; Polychaeta; Transports adultes; Recrutement; Prolifération; Lanice conchilega; Polychète.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-538.pdf

Déterminisme du recrutement. Séminaire de Nantes, 2-4 juillet 1984
Provedor de dados: 5
Autores: Ifremer.
The causality of recruitment is of paramount importance for the progress of the control of marine living resources, but its study remains technically complax.The aim of the Nantes panel was to evaluate the state of advancement of three running programs on exploited species (sole, scallops and oysters), and to set out the basis of a wider national program of interest for both basic and targeted research.
Tipo: Text
Palavras-chave: Recrutement; Variabilité; Déterminisme; Sole; Coquille St Jacques; Huître; Recruitment; Variability; Causality; Sole; Scallop; Oyster.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00136/24713/22766.pdf

Eléments concernant l'huître plate, Ostrea edulis
Provedor de dados: 5
Autores: Martin, Anne-genevieve.
La production française d'huîtres plates (Ostrea edulis) est assurée en majeure partie par les centres bretons. Le captage de cette espèce se fait essentiellement en Bretagne dans la baie de Quiberon et les rivières attenantes. Le laboratoire conchylicole ISTPM de La Trinité S/Mer consacre donc une partie de ses programmes, d'une part à l'étude de la reproduction de l'huître plate afin de déterminer la période favorable à la pose des collecteurs, d'autre part à l'évaluation du recrutement sur ces collecteurs.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Reproduction; Captage; Recrutement.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/00016/12704/9626.pdf

Écologie de la reproduction de l’huître Crassostrea gigas en lagune méditerranéenne
Provedor de dados: 5
Autores: Lagarde, Franck.
The Mediterranean lagoons host many anthropogenic uses including shellfish aquaculture since the beginning of the 20th century. Imported in 1970, the cupped oyster, Crassostrea gigas, has adapted perfectly and has allowed an important development of oyster’s industry until 2008, the year of occurence of spat outbreak related to the emergence of an Ostreid Herpes-virus μvar. The scarcity of spat and the speculation on this product changed regionally cultural practices and the supply of juveniles, with in particular the wish of developing a local activity of spat collection. However the cycle of reproduction of the species and the recruitment of juveniles were poorly known in lagoon environments. In this context, the objective of this thesis is to...
Tipo: Text
Palavras-chave: Huître; Écologie larvaire; Ressource trophique; Connectivité; Recrutement; Lagune côtière; Oyster; Larval ecology; Trophic resource; Connectivity; Recruitment; Coastal lagoon.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00472/58347/60901.pdf

Observer, Analyser et Gérer la variabilité de la reproduction et du recrutement de l’huître creuse en France : Le Réseau Velyger. Rapport scientifique annuel du réseau national Velyger, convention DPMA-Ifremer 2016
Provedor de dados: 5
Autores: 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

Stries journalières dans les otolithes d'anchois (Engraulis encrasicolus) d'âge 1 an et lien avec l'environnement
Provedor de dados: 5
Autores: Julien, Timothee.
Mieux comprendre les fluctuations des stocks chez les espèces marines exploitées, telles que l’anchois  (Engraulis  encrasicolus),  est  une  problématique  importante  en  halieutique.  Les premiers  stades  de  vie  des  poissons  sont  reconnus  comme  des  périodes  critiques.  Les mécanismes intervenant dans le succès du recrutement sont méconnus aujourd’hui. Le but de cette  étude  est  de  définir  une  période  de  naissance  des  individus  recrutés  à  la  population d’anchois  du  golfe  de  Gascogne.  La  lecture  des  incréments  journaliers  sur  des  otolithes d’individus  d’âge  1  est  une  approche  novatrice.  Les  otolithes  sont  issus  d’anchois échantillonnés lors de la campagne PELGAS 2004. Les résultats indiquent que la taille des...
Tipo: Text
Palavras-chave: Otolithes; Anchois; Incréments journalier; Recrutement; Croissance.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00393/50406/51121.pdf

Analyse des petits pelagiques, sardine et anchois, dans le golfe de Gascogne
Provedor de dados: 5
Autores: Coiffec, Gaelle; Duhamel, Erwan; Biseau, Alain; Danzart, Marc.
Since 1993 the yearly amounts of sardine landings for the Bay of Biscay fishing ports have experienced a constant increase (10,000 tonnes in 1993); on that account sardine is the first species landed in the fishing ports of the Bay of Biscay (15,000 tonnes in 2003). It is sold 0.54 € / kg (constant price over ten years) which means a 8,100 k€ turnover in 2003 and the 12th rank in value landed in the fishing ports of Bay of Biscay. Though anchovy landings have decreased over the last ten years, especially since 2001, this species occupies the 3rd rank of the highest landings (7,300 tonnes) of the Atlantic shoreline in 2003.The decrease of anchovy landings over the last ten years may account for the high increase of its constant sale price of 1.5 € / kg from...
Tipo: Text
Palavras-chave: Purse seiner; Midwater pair  trawler; Sardine; Anchovy; Pelagic; Bay of Biscay; Recrutement; Senneur; Chalutier pelagique; Bolincheur; Sardine; Anchois; Pelagique; Golge de Gascogne.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2287.pdf

Otoliths imprinting of sole (Solea solea) from the Bay of Biscay: a tool to discriminate individuals from nursery origins?
Provedor de dados: 5
Autores: De Pontual, Helene; Lagardere, Francoise; Troadec, Herve; Batel, Alain; Desaunay, Yves; Koutsikopoulos, Constantin.
Sole nurseries are located in the main bays and estuaries of the Bay of Biscay, where juveniles from the same stock. concentrate and constitute temporarily isolated groups. This context being favourable for elemental analyses of juvenile otoliths this study has been initiated with the aim of obtaining environmental imprints of the main nurseries of origin of juveniles recruiting to the adult stock, and of evaluating the relative contribution of these nurseries to the stock. The objectives were to compare (i) the otolith elemental imprints obtained by sampling juveniles in the Loire and the Gironde nurseries, and (ii) two multi-element analysis techniques: laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and solution-based ICPMS...
Tipo: Text
Palavras-chave: Recruitment; Juvenile; Estuarine nursery; ICPMS; Trace elements; Otolith; Recrutement; Juvénile; Nourricerie estuarienne; ICPMS; Eléments traces; Otolithe.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-537.pdf

Manque de naissain de moules pendant trois années consécutives dans les bouchots du Pertuis Breton. Observations préliminaires sur l'influence de la température et de l'ensoleillement
Provedor de dados: 5
Autores: Dardignac, Marie-jose; Prou, Jean.
Arnong the last ye3Is, three years are pointed out by paar mussei's recruitment in the Pertuis Breton. This lack leJds ta a Strong decrease of lhe cultivateà biamass. The influences of temperature and sunshine were studied. The lemperature daes nal seem ta be a very important faclor. On the other hand, awing ta the technicals used in the Pertuis Breton an important sunshine correlated with a spring tide during seed settlement on ropes appears ta be a maj or factor in spatfall suceess. This hypothesis is strenghened by the fact that, during the period of study no recruitment failure were observed on the off- shore long lines.
Tipo: Text
Palavras-chave: Reproduction; Moules; Recrutement; Captage; Pertuis Breton; Département Charente-Maritime.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00141/25189/23295.pdf

Campagnes expérimentales de chalutage en mer du Nord et Manche Orientale. Volume I. Les campagnes I.B.T.S. 1997 &amp; 1998
Provedor de dados: 5
Autores: Verin, Yves; Dufour, Jean-louis.
Since 1976, France participates to the International Bottom Trawl Survey (IBTS), coordinated by the International Council for Exploration of the Sea (ICES). The main objective of the survey which is carried out on board of a research vessel, is to obtain annual forecasts of recruitment for the various commercial fish species of the North Sea. These estimates are used by ICES Working Groups to assess these various stocks and to propose management measures for the following year. In addition, the data collected during these surveys concern biological and abundance analysis of main commercial fish species exploited by European countries in the North Sea. The results of studies are published in scientific papers and have improved knowledge in this field....
Tipo: Text
Palavras-chave: Mer du Nord. CIEM; Recrutement; Stocks de poissons; Indices d'abondance; Chalutage; Campagne d'échantillonnage; Mer du Nord; [CES; Recruitment; Fish stocks; Abundance indices; Trawling; Survey.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/00306/41760/40973.pdf

Observer, Analyser et Gérer la variabilité de la reproduction et du recrutement de l’huître creuse en France : Le Réseau Velyger. Rapport annuel 2014
Provedor de dados: 5
Autores: 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

Comparaison de deux méthodes de prélèvement pour le dénombrement des larves de Crassostrea gigas en zone conchylicole
Provedor de dados: 5
Autores: 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

Absence de captage de Crassostrea gigas dans le bassin de Marennes-Oléron en 1981 : causes et conséquences
Provedor de dados: 5
Autores: Berthome, Jean-paul; Deslous-paoli, Jean-marc; Heral, Maurice; Razet, Daniel; Garnier, Jacqueline.
The want of C. gigas spat-catching in the Marennes-oleron basin in 1981 can be due to various different reasons which are analysed here. Physico -chemical and trophic factors that can induce variations in the quality of gametogenesis, are successively in comparison with the year 1979 when reproduction was good. The biochemical evolution and a study of gonads slow a lack in maturation in 1981 even during the summer period. Late maturation of gonads bring about physiological consequences which induced mortality of cultivated oysters at the end of winter. A feeble recruit and a decrease of the cultivated stock have economic consequences which here sketched up.
Tipo: Text
Palavras-chave: Larvae; Recrutment; Spat; Crassostrea gigas; Oysters; Larves; Recrutement; Captage; Crassostrea gigas; Huîtres.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-2948.PDF

Développement et utilisation des marqueurs génétiques hypervariables chez les espèces marines. Rapport de synthèse 1995-1998
Provedor de dados: 5
Autores: Bonhomme, Francois; Gerard, Andre.
L'objectif scientifique de l'Unité de Recherche Marine n0 16 est de partager les savoir faire conceptuels et méthodologiques des deux équipes, pour faire aboutir des programmes appliqués ou fondamentaux dans le domaine de la génétique des organismes marins. Ces programmes concernent plus particulièrement le développement et l'utilisation des marqueurs génétiques fournis par les techniques de biologie moléculaire dans les programmes suivants: Chez les huîtres des genres Ostrea et Crassostrea : Le modèle prioritaire de l'URM sera les huîtres Crassostrea et Ostrea. Pour des raisons historiques, les recherches sur Ostrea sont plus avancées et donneront des résultats plus rapidement. 1-Sélection assistée par marqueurs chez Ostrea edulis et Crassostrea gigas...
Tipo: Text
Palavras-chave: Génétique; Marqueur génétique; Biologie moléculaire; Sélection génétique; Ressource génétique; Recrutement; Bivalvia; Crassostrea; Ostrea; Pisces; Dicentrarchus labrax; Génotypage.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00043/15459/12834.pdf

Recherche de gisements de captage naturel de Crassostrea gigas en lagune de Thau.Répartition spatiotemporelle du naissain, aspects culturaux et économiques.
Provedor de dados: 5
Autores: Lagarde, Franck; Perignon, Adeline; Gervasoni, Erika; Mortreux, Serge; Meddah, Slem; Leurion, Axel; Le Gall, Patrik; Guillou, Jean-louis; Boj, Marie; Fuhrmann, Marine; Richard, Marion; Ubertini, Martin; Fiandrino, Annie; Roque D'Orbcastel, Emmanuelle; Pouvreau, Stephane.
Le travail est axé sur la volonté de la filière conchylicole méditerranéenne pour s'approvisionner en naissains d'huîtres creuses sauvages d’origine lagunaire. L'observatoire du captage naturel, mis en place entre 2012 et 2014, a permis de découvrir des gisements de naissains collectés naturellement dans la lagune de Thau selon un protocole défini à l’échelle expérimentale. Bien que très hétérogènes spatialement et temporellement, les densités de naissains sur les collecteurs révèlent des catégories de captage allant de "moyen i. e. 20 à 200 naissains par coupelle" à "excellent i. e. 200 à 2000 naissains par coupelle " sur certaines stations expérimentales. Les expériences de captage naturel à échelle semi-industrielle (avec filière de coupelles en lagune)...
Tipo: Text
Palavras-chave: Captage naturel; Crassostrea gigas; Recrutement; Conchyliculture méditerranéenne; Lagune.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00260/37103/35632.pdf

Colonisation d'un récif frangeant de l'île de La Réunion par les larves de poissons coralliens
Provedor de dados: 5
Autores: Durville, P; Bosc, P; Galzin, R; Conand, C.
The colonization of a fringing reef of Reunion Island by fish larvae takes place essentially from August to February with two peaks, in August-September, when the water temperatures are coldest, and in February when they are at a maximum. The number of fishes, as well as the number of sampled species, present similar values over two consecutive years with, nevertheless, a strong variation in the species involved. In Reunion Island, the number of post-larvae which colonise the reef is one hundred to four hundred times lower than on larger and more structured reefs. This phenomenon could be explained by the geographical characteristics of the island. The stock control of the adult fish in Reunion could largely be the result of the arrival of post-larvae on...
Tipo: Text
Palavras-chave: Colonisation larvaire; Recrutement; Poisson corallien; Récif frangeant; Île de La Réunion; Larval colonization; Recruitment; Coral fish; Fringing reef; Reunion Island.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/00322/43326/42928.pdf

Les baudroies ou lottes, espèces majeures de la pêche française: situation et perspectives
Provedor de dados: 5
Autores: Dupouy, Herve; Andro, M; Avrilla, J.l.; Fifas, Spyros; Kergoat, Bernard; Morizur, Yvon; Mtimet, M; Pennober, J.p; Rivoalen, Jean-jacques.
Tipo: Text
Palavras-chave: North East Atlantic; France; Trade analysis; Commercial species; Angler; Monk; SEM; Débarquement; Recrutement; Engins de pêche; Lophius budegassa; Lotta lotta; Lophius piscatorius; Baudroie; Lotte.
Ano: 1993
URL: https://archimer.ifremer.fr/doc/1993/rapport-2187.pdf

Evaluation du recrutement d'huîtres plates (Ostrea edulis) collectées sur tuiles dans le quartier d'Auray (Bretagne)
Provedor de dados: 5
Autores: Martin, Anne-genevieve; Grizel, Henri; Langlade, Aime.
La région d'Auray avec la Baie de Quiberon et les rivières attenantes, est le seul centre de captage de l'huître plate en Bretagne. Celui-ci s'effectue sur des parcs situés en zone intertidale à partir de tuiles chaulées. La présente étude a permis de dénombrer les collecteurs posés durant la campagne de reproduction 1979 et d'évaluer le poids de naissain récolté. Celui-ci est de 516,36 +/- 45,36 tonnes pour un total de 19 383 000 tuiles. Les données obtenues seront utilisées ultérieurement pour analyser les performances du captage en fonction de la date et du mode de pose des collecteurs.
Tipo: Text
Palavras-chave: Huître plate; Ostrea edulis; Recrutement; Naissain; Collecteur; Auray; Baie Quiberon; Bretagne.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00009/11987/8691.pdf

Observer, Analyser et Gérer la variabilité de la reproduction et du recrutement de l’huître creuse en France : Le Réseau Velyger. Rapport annuel 2015
Provedor de dados: 5
Autores: 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 dizaine 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; Recrutement; Captage; Larves; Cycle de reproduction; Changement climatique; Pacific oyster; Spat; Recruitment; Seed collecting; Larvae; Reproductive cycle; Climate change.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00334/44533/44240.pdf

The influence of variability in larval dispersal on the dynamics of a marine metapopulation in the eastern Channel
Provedor de dados: 5
Autores: Ellien, Celine; Thiebaut, Éric; Barnay, Anne-sophie; Dauvin, Jean-claude; Gentil, Franck; Salomon, Jean-claude.
In the English Channel, the polychaete Pectinaria in koreni forms isolated populations confined in bays and estuaries. To determine the influence of larval dispersal variability on the observed stock fluctuations of the three major Pectinaria koreni populations reported along the French coasts of the eastern Channel, larval dispersal was simulated using a 2D hydrodynamical lagrangian model integrating both the tidal residual and the wind-driven circulation. Year-to-year fluctuations of adult stocks were established from benthic surveys carried out between 1973 and 1998. Larval dispersal patterns vary between populations according to the relative importance of tidal advection and eddy diffusion so that local larval retention is maximal where tidal advection...
Tipo: Text
Palavras-chave: Pectinaria koreni; Metapopulation; Modelling; Recruitment; Larval dispersal; Pectinaria koreni; Métapopulation; Modélisation; Recrutement; Dispersion larvaire.
Ano: 2000
URL: https://archimer.ifremer.fr/doc/2000/publication-535.pdf

Modelling and numerical simulations of larval migration of the sole (Solea solea (L.)) of the Bay of Biscay. Part 2: numerical simulations
Provedor de dados: 5
Autores: Ramzi, Azeddine; Arino, Ovide; Koutsikopoulos, Constantine; Boussouar, Ahmed; Lazure, Pascal.
This paper is the second part of a work on the modelling of larval migration and growth fur the sole of the Bay of Biscay (Solea solea (L.)). The goal of the paper is twofold: first of all, it aims at presenting a numerical application of the formulae (concerning the recruitment rate) elaborated in the first paper. Results show a high sensitivity with respect to some parameters. Then, a comparison is made with a numerical model using a 3D circulation model provided by Ifremer.
Tipo: Text
Palavras-chave: Recruitment; Diffusion and advection processes; Population dynamics; Recrutement; Avection; Processus de diffusion; Dynamique de population.
Ano: 2001
URL: https://archimer.ifremer.fr/doc/2001/publication-532.pdf

Un modèle empirique du recrutement pour le stock de coquilles Saint Jacques, Pecten maximus (L.) en baie de Saint-Brieuc (Manche, France)
Provedor de dados: 5
Autores: Fifas, Spyros; Dao, Jean-claude; Boucher, Jean.
This paper proposes an empirical model for the recruitment of the scallop stock, Pecten maximus (L.), in Saint-Brieuc Bay (English Channel, France). This stock shows important fluctuations in recruitment. The use of traditional models for fish population dynamics based upon an equilibrium state were inadéquate. This model includes three independent variables: spawning biomass, effects of fishing effort on the unexploited year classes, and temperature. Correlations between these expressions of independent parameters and recruitment are systematically analysed. The choice of the final model relies on minimization of the total variance unexplained portion. Introduction of fishing pattern into the model is realized by testing fishing effort effects upon two...
Tipo: Text
Palavras-chave: Recrutement; Modèle empirique; Pecten maximus; Température; Biomasse féconde; Effort de pêche; Recruitment; Empirical model; Pecten maximus; Temperature; Spawning biomass; Fishing effort.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00189/30069/28557.pdf

Déterminisme du recrutement larvaire de l’huître creuse (Crassostrea gigas) dans la lagune de Thau.
Provedor de dados: 5
Autores: Lagarde, Franck; Fiandrino, Annie; Richard, Marion; Bernard, Ismael; Mortreux, Serge; Ubertini, Martin; Chiantella, Claude; Boj, Marie; Meddah, Slem; Leurion, Axel; Soriano, Solenn; Fuhrmann, Marine; Le Gall, Patrik; Chiera, Caroline; Berteaux, Tom; Guillou, Jean-louis; Roque D'Orbcastel, Emmanuelle; Perignon, Adeline; Bonnet, Delphine; Roques, Cecile; Bec, Beatrice; Cochet, Helene; Gervasoni, Erika; Miron, Gilles; Pouvreau, Stephane.
Since spat mortality events that were firstly detected in 2008, Mediterranean shellfish industry seeks to exploit the Pacific oyster spat from lagoon natural recruitment. The CRCM, Cepralmar and Ifremer developed accordingly a research project named PRONAMED Phase 1 and 2 - 2010-2014, in order to define the economic potential of spatfall and improve knowledge of the reproductive cycle of Crassostrea gigas in this specific environmental context. The results of the past three year‘s study (2012, 2013, 2014) showed that broodstock have the ability to provide larvae after sexual maturation and spawning. A coincidence was noted between moon phase (new and full moon) and spawnings with an amplifying effect of storms on the intensity of spawning (Ubertini et al....
Tipo: Text
Palavras-chave: Lagune; Recrutement; Naissain; Huître creuse; Ecologie larvaire; Cycle de reproduction; Captage naturel.; Lagoon; Recruitment; Spat; Pacific oysters; Larval ecology; Reproduction Cycle; Natural spat collection.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00279/39054/37620.pdf

Reproduction de l'huître creuse (Crassostra gigas) dans le Bassin de Marennes Oléron. La pêche expérimentale de larves d'huîtres, indicateurs de ponte et de recrutuement. Analyse spatio-temporelle et relation avec l'environnement
Provedor de dados: 5
Autores: Soletchnik, Patrick.
This study is based on catched larvae data base produced since C. gigas was first imported into the Charentais Sounds (late 1960s, early 1970s). The method for catching larvae using a towed net remained unchanged between 1950 and 1998. Four sites have been sampled in the Bay since 1970, two situated in the Seudre estuary and two in the middle of the Bay. Two other sites from near the mouth of the Charente River have been sampled since 1982. For each sample, oyster larvae were counted in four size classes, from the young larva (1-4 days) to near metamorphosis (16-20 days). Each year, 100 to 150 captures were carried out at all sample sites between June and September. Captures from July and August represent 99% of the total. The main variables were: capture...
Tipo: Text
Palavras-chave: Crassostrea gigas; Marennes Oléron Bassin; Pertuis Charentais; Analyse spatio temporelle; Recrutement; Saison; Larve; Ponte; Huîtrs; Reproduction.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2008/rapport-4125.pdf

Modélisation biophysique pour la prévision du recrutement
Provedor de dados: 5
Autores: Allain, Gwenhael.
Exploited fish populations are dependent on recruitment (i.e. size of the new year class) to sustain their abundance. Recruitment variations are related to hydroclimatic variations and may accentuate the detrimental effects of fishing. Recruitment prediction requires accurate fisheries oceanographic tools, which are expected to be more reliable than large-scale correlation analyses between fish abundance and climate variables.  Recruitment is the result of the integration over a season and large oceanic areas of processes affecting larval survival, which are dependent on small-scale mechanisms. Hydrodynamic models are a tool to perform this integration. This thesis aims at exploring and modelling physical-biological interaction mechanisms in order to...
Tipo: Text
Palavras-chave: Anchovy; Upwelling; Turbulence; Retention; Fisheries management; Population dynamics; Stock environment interaction; Stock recruitment relation; Scale integration; Individual based models; Survival; Growth; Otolith; Physical biological interactions; Prediction; Recruitment; Turbulence; Rétention; Méso échelle; Intégration des échelles; Modèle de survie; Modèle de ponte; Modèles individu centrés; Modèles de corrélation; Modèles stochastiques; Juvéniles; Larves; Otolithe; Modèle de croissance; Interactions physique biologie; Prévision; Recrutement.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/these-5.pdf

Les pêcheries françaises du chalutage à bar : analyse de séries temporelles 1999-2007
Provedor de dados: 5
Autores: Morizur, Yvon; Meunier, M; Huet, Jerome; Martin, S.
A displacement of the fishing effort of the French pelagic trawlers from anchovy to the seabass fisheries is observed. A such situation on a non-quota managed species requires to analyse carefully the evolution in the status of seabass stocks. The evolution of fishing effort, the production and the landings per unit of effort were studied from 2000 to 2007 for the bottom trawling and for the pair pelagic trawling in the ICES sub-areas VIII and VII. The fishing effort was assessed by using a threshold on the landings by month in order to select the most effective fishing effort as representing 75 % of the effort concerned with seabass landings. Length compositions and age-length keys were used to calculate the cpue-at-age series. A total mortality value was...
Tipo: Text
Palavras-chave: Fishing mortality; Recruitment; Abundance index; Fishing effort; Trawling; Seabass; Dicentrarchus labrax; Mortalité par pêche; Recrutement; Indice d'abondance; Effort de pêche; Chalutage; Bar commun; Dicentrarchus labrax.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/rapport-7303.pdf

Reproduction et recrutement de Mytilus edulis L. cultivée sur les bouchots du bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Boromtharanat, S; Deslous-paoli, Jean-marc; Heral, Maurice.
Observations on the gonads of 50 mm mussels, made during 1983 and 1984, showed that the onsert of gametogenesis occured during September and that the gonads reached maturity in December. Spawning took place from early February to April at temperatures from 10 to 12°C. The flesh had a high water content at the beginning of the spawning period. The pelagic live of the larvae lasts about 30 days with settlement occurring in June when some 90 and 100 spats settle on 1 cpm of rope per day. The intensity of recruitment was 56.10(4) and 722.10(4) larvaes on rope corresponding to a square meter during 1983, and between 28.10(4) and 81.10(4) during 1984.
Tipo: Text
Palavras-chave: Crawl; Recruitment; Reproduction; Mytilus edulis; Bouchot; Recrutement; Reproduction; Mytilus edulis.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/publication-2865.pdf

Dynamique de la population de Sandre  Stizostedion Lucioperca
Provedor de dados: 20
Autores: Toujani, R.; Kraiem, M.M.
L’étude de la dynamique de population du sandre Stizostedion lucioperca dans la retenue du barrage de Sidi Salem (nord de la Tunisie) a été réalisée durant deux saisons : avril 1996 - mars 1998 . Elle a porté sur un échantillon de 1325 individus capturés par les pêcheurs professionnels. Cette étude a montré que: - La taille moyenne individuelle des sandres captures est inférieure à 30 cm pour une proportion supérieure à 75 % . - La taille de recrutement dans la pêcherie estimée à 18 cm est très inférieure à la taille de première maturité sexuelle de l’ espèce qui est de 24 cm. - La taille et la masse individuelles moyennes des sandres capturés se sont améliorées durant la saison 1997 par rapport à celle de 1996. - Le taux de mortalité par pêche des groupes...
Tipo: Journal Contribution
Palavras-chave: Taille; Mortalité; Length-weight relationships; Recrutement; Masse; Recruitment; Stizostedion lucioperca; Mortality; Freshwater fish; Population dynamics; Pike perch; Http://aims.fao.org/aos/agrovoc/c_5877.
Ano: 2002
URL: http://hdl.handle.net/1834/221