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Registros recuperados: 17
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Caractérisation et modélisation des processus de bioaccumulation des PCB chez le merlu (Merluccius merluccius) du golfe du Lion ArchiMer
Bodiguel, Xavier.
Understanding bioaccumulation mechanisms of persistent organic pollutants (POPs) is a major issue for environmental risk assessment. In this work, polychlorinated biphenyls (PCBs), a model contaminant family, has been studied in the European hake (Merluccius merluccius), a high trophic level species from the Gulf of Lions. High concentrations of PCBs were measured in hake from this area compared to those encountered in the population of the Bay of Biscay. PCB biomagnification was highlighted along its food web from marine phytoplankton, suggesting a strong influence of diet on contamination levels. The role of other biological processes was also apprehended in order to understand the high variability of observed levels. Thus, growth, sex, and also the...
Tipo: Text Palavras-chave: DEB theory; Bioenergetic model; Gulf of Lions; Biomagnification; Food web; Hake; Bioaccumulation; Polychlorinated biphenyls; Organic contaminants; Théorie DEB; Modèle bioenergétique; Golfe du Lion; Bioamplification; Réseau trophique; Merlu; Bioaccumulation; Polychlorobiphényles; Contaminants organiques.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-6490.pdf
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Contribution à l'évaluation et à l'évolution de la puissance de pêche des fileyeurs français ArchiMer
Morizur, Yvon; Carn, Nolwenn.
En l'absence de données fines sur l'effort de pêche des fileyeurs, on prend couramment la journée de pêche comme unité d'effort. C'est le niveau disponible pour tous les bateaux. Lorsque l'on prend la journée de pêche comme unité d'effort dans le fileyage, l'on se réfère à une unité de temps qui comporte des opérations de levage et parfois de filage et de levage, et la puissance de pêche dépendra principalement des quantités de filets levés, la durée d'immersion étant un facteur peu variable dans une même pêcherie. Cette étude vise à étudier l'influence de ce facteur sur la puissance de pêche et à étudier le lien avec des paramètres physiques connus. Les analyses effectuées montrent que, pour les années 1996-97, les quantités de filets sont dépendantes de...
Tipo: Text Palavras-chave: Hake; Sole; Anglerfish; Spider crab; Length of nets; Evolution; Fishing power; Fishing effort; Fixed nets; Merlu; Baudroie; Sole; Araignée; Evolution; Puissance de pêche; Longueur des filets; Effort de pêche; Filets fixes.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/rapport-1243.pdf
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Développement d'une plateforme d'évaluation de plans de gestion spatialisés : application à la pêcherie mixte démersale du golfe de Gascogne ArchiMer
Vigier, Audric.
North-East Atlantic fisheries management goes towards a regionalisation, accounting for mixed fisheries technical interaction. Hence, understanding and assessing the spatio-temporal dynamics of exploited species and the fleets exploiting them is needed. This study aims to provide a tool to assess the effects of several management scenarii in the Bay of Biscay. lt fouses on North-east Atlantic northern hake stock (Merluccius merluccius) and the mixed demersal hake - sole (Solea solea) - Norway lobster (Nephrops norvegicus) Bay of Biscay fisheries.A Management Strategy Evaluation (MSE) framework has been developed, pairing a spatial northern hake stock assessment model, and an operating model (lSlS-Fish) simulating the Bay of Biscay mixed demersal...
Tipo: Text Palavras-chave: Merlu; Golfe de Gascogne; Evaluation de stratégies de gestion; Hake; Bay of Biscay; Management strategy evaluation; ISIS-Fish; Stock synthesis.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00498/60972/64380.pdf
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Développement et ajustement d'un modèle de dynamique des populations structuré en longueur et spatialisé appliqué au stock Nord de merlu (Merluccius merluccius) ArchiMer
Drouineau, Hilaire.
The biology of European hake has been largely studied, however some specific processes of its biology, especially growth and migration, are still poorly known. Those uncertainties have consequences on the quality of the stock assessments and on the stock management by limiting the possibility to assess the effect of spatial management measures. Therefore, we develop an integrated length-structured and spatialised model of population dynamics aiming at improving the estimation of unknown parameters of the population dynamic. The model relies on a state model describing the dynamics of the population and the fishing activity, and on an observation model describing the observation processes and providing a likelihood function. A review of the literature...
Tipo: Text Palavras-chave: Parameters estimation; Migration; Growth; Sensitivity analysis; Likelihood; Spatialised model; Stock assessment; Length structured model; Hake; Estimation de paramètres; Migration; Croissance; Analyse de sensibilité; Maximum de vraisemblance; Modèle spatialisé; Évaluation des stocks; Modèle structuré en longueur; Merlu.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-3710.pdf
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Etude d'une gestion optimale des pecheries de langoustines et de poissons demersaux en mer Celtique ArchiMer
Laurec, Alain; Charuau, Anatole; Perodou, Jean-bernard; Nedelec, Daniel; Biseau, Alain; Durand, Jean-louis; Rivoalen, Jean-jacques; Dupouy, Herve; Le Louarn, G.; Leroux, L..
The general study, scheduled from 1984 to 1986, aims at providing a judgement about the fisheries in the Celtic Sea. This area has been chosen because it is frequented by EEC vessels with, for the time being, a large majority of French vessels. Activities there are easier to monitor than anywhere else as coastal fisheries are little developed in the area. The final product will consist of a certain number of hypotheses about the planning strategies that could be implemented in the Celtic Sea. The main idea is, firstly, to conduct analytical studies, stock by stock, in order then, to synthesize them into a model integrating the interactions between fleets in relation to their target species. A bio-economical model, deriving from the latter, will enable the...
Tipo: Text Palavras-chave: Monk; Cuckoo ray; Blue whiting; Cod; Hake; Ling; Common dab; Data bases; Fishing statistics; French fisheries; Demersal fish; Nephrops; Celtic Sea; Baudroies; Raie fleurie; Julienne; Cardine; Morue; Merlu; Merlan; Base de données; Rejets; Statistiques de pêche; Pêcheries françaises; Poissons demersaux; Langoustine; Mer Celtique.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/rapport-3671.pdf
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Etude d'une gestion optimale des pecheries de langoustines et de poissons demersaux en mer Celtique (phase 1) ArchiMer
Biseau, Alain; Noel, Philippe; Ottenheimer De Gail, G.; Rivoalen, Jean-jacques.
This study of the demersal and benthic fisheries in the Celtic Sea is the logical continuation of the works conducted on the scampi fisheries since 1978. The program of the first phase of the study consists of 1 - A description of fisheries in the Celtic Sea. 2 – An assessment of the rejection of the marketable species in each fishery, with a special mention for fish fisheries. 3 – The constitution a computerized database including international fishing statistics since 1980. 4 – The sampling of the unloading of seven main species or groups of species: - cod and whiting, already sampled (length and age) regularly since 1978 in order to provide data to the CIEM workgroup. "Irish Sea – Bristol Channel", - scampi, sampled since 1980 in the scope of the CIEM...
Tipo: Text Palavras-chave: Cartography; Ray; Monk; Common dab; Hake; Demersal fish; Nephrops; Celtic Sea; Cartographie; Rejets; Raie; Baudroie; Cardine; Merlu; Poissons demersaux; Langoustines; Mer Celtique.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/rapport-3672.pdf
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Etude préliminaire pour la mise au point et le développement d'un chalut muni d'une grille sélective à langoustine ArchiMer
Morandeau, Fabien.
This study is part of the trawl selectivity program carried out on behalf of the local fisheries committee of Le Guilvinec. It aims to study the possibility of saving young scampis through the use of trawls equipped with "sorting grids". The covered area focuses on scampi and hake fisheries. The chosen period stretches from September to November 2000. Two vessels went out to sea as a first contribution to the study: the "hippocampe" and the "Gwen Vidic", both from Le Guilvinec.
Tipo: Text Palavras-chave: Galathée; Merlu; Rejet langoustine; Grille langoustine.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/rapport-3888.pdf
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Impacts de l’émergence d’un top-prédateur dans un ecosystème exploité : le merlu et le lieu noir de mer du Nord. Quelles interactions ? Quelles conséquences ? ArchiMer
Cormon, Xochitl.
North Sea saithe (Pollachius virens) has high economic value for European fisheries. In recent years, North Sea saithe abundance has decreased, while abundance of hake (Merluccius merluccius), which was rarely fished in the North Sea, has increased dramatically in the area. This work investigates the nature of the ecological interactions between saithe and hake in the North Sea, in order to understand if recent hake emergence in this area could explain, at least partially, the recent decline of the saithe stock. The results obtained during this research suggested competitive interactions between saithe and hake predators in the area. In addition, this investigation revealed potential negative effects of hake on the resident saithe stock. Therefore, hake...
Tipo: Text Palavras-chave: Compétition; Lieu noir; Merlu; Simple réseau trophique; Émergence d’un prédateur; Mer du nord; Exploitative competition; Saithe; Hake; Simple foodweb; Up-coming predator; North sea.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00345/45638/45268.pdf
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La pêche du merlu à La Rochelle. Analyse des statistiques de 1966 ArchiMer
Meriel-bussy, Pol.
Le déclin de la pêche du merlu dans l'Atlantique nord-est alarme tous les pays dont les bateaux fréquentent les régions 2 et 3 du NEAFC. Une connaissance précise des quantités de poissons débarqués et des efforts de pêche dans les différents secteurs devient de plus en plus nécessaire. Nous avons donc été amené à poursuivre, en la développant, l'étude des statistiques du port de La Rochelle. Ce sont les premiers résultats de ce travail, obtenus à partir des données de 1966, que nous présentons ici.
Tipo: Text Palavras-chave: Pêche; Merlu; Statistiques.
Ano: 1967 URL: http://archimer.ifremer.fr/doc/00142/25326/23403.pdf
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La pêche du merlu au filet maillant sur les côtes françaises de l'Atlantique et plus particulièrement à La Rochelle ArchiMer
Quero, Jean-claude; Meriel-bussy, Pol.
Au cours de l'année 1966, la pêche du merlu au filet maillant se développe sur les côtes françaises de l'Atlantique. Les premiers mois, ses rendements bien supérieurs à ceux du chalut lui attirent un grand nombre d'artisans dans presque tous les ports du Golfe de Gascogne. Son développement est rapide, mais très vite, les apports diminuent en qualité et en quantité. Ce type de pêche subit alors une désaffection aussi brusque que l'a été son extension. Treize mois après son introduction, cette technique est presque entièrement abandonnée. Nous avons pensé qu'il serait intéressant d'en retracer l'historique, d'étudier la composition de ses captures et l'évolution de ses rendements.
Tipo: Text Palavras-chave: Pêche; Merlu; Filet maillant; Capture.
Ano: 1967 URL: http://archimer.ifremer.fr/doc/00142/25327/23404.pdf
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Le merlu du golfe de Gascogne et de la mer Celtique : Croissance, Répartition spatiale et bathymétrique, Ecologie alimentaire et Assemblages ArchiMer
Kacher, Mohamed.
In the Bay of Biscay and Celtic Sea waters, hake is considered as genetically homogeneous and form a unique stock with identical meristic characteristics. The vertebral mean vary from 50,68 (vertebrae) during the first year of life to 51,11 (vertebrae) for adults. 0-group Merluccius display a rapid growth with significant interannual variability (0.71 mm.day-1 in 2001 versus 0.74 mm.day-1 in 2002). The spawning period occurs in April and the average length on the firth January following the hatching is of 17.3 cm (first seasonal check / increment on the sagittal otolith is located about 0.143 cm from the nucleus). At the end of the first year of life the average length is about 24 cm. The longevity of the species is important and growth parameters (L =...
Tipo: Text Palavras-chave: Celtic sea; Bay of biscay; Ecologie; Juvéniles; Otolith; Growth; Assemblages; Hake; Mer celtique; Golfe de Gascogne; Ecologie; Juvéniles; Otolithe; Croissance; Assemblages; Merlu.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-1247.pdf
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Le merlu europeen (Merluccius merluccius L.). Bilan des connaissances biologiques. Evolution de l'exploitation. Evaluations des stocks et mesures de gestion ArchiMer
Guichet, Roger.
European hake is one of the most important commercial species of the North East Atlantic. Its biology is quite well known in spite of age reading problems. This report provides a review of the state of knowledge based on updated data, specially for parameters used in the working groups in charge of stocks assessments. The fisheries for hake are essentially sequential. In recent years fishing mortalities have been moderate and the over exploitation of the stocks is due to the excessive catches of young fish and to the fishing pattern of some fleets. The result of this inappropriate exploitation pattern is dangerous with a decrease of the spawning stock biomass and recrutrnent for the two stocks.
Tipo: Text Palavras-chave: Merlu; Nord Est Atlantique; Biologie; Exploitation; Gestion; Hake; North East Atlantic; Biology; Fisheries; Management.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00422/53327/54169.pdf
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Les pêcheries mixtes de langoustine et merlu du Golfe de Gascogne, modélisation bio-économique et simulation des procédures de gestion ArchiMer
Charuau, Anatole.
Fishing crayfish on the gulf's mudflats is a traditional business practised by 450 boats of 12 to 18 metres in length and employs 2,500 sailors. In the north of the gulf, this activity is exclusive, in the south, immature hake are also caught, because the crayfish areas coincide, in part, with the nurseries of the northern stock of this species. Management of these fisheries, called mixed, of crayfish and hake is one of the greatest problems of the Gulf of Gascony. All assessments tend to show the responsibility of the crayfish boats in the future of the hake stock. The solution is likely to pass through a generalised increase of the 80 mm meshing that would lead, eventually, the hake stock yield to its maximum, but would eliminate a great many trades...
Tipo: Text Palavras-chave: Mixed fisheries; Bio economical modelisation; Bay of Biscay; Simulation; Prawn; Hake; Fishing fleet strategy; Fishing assessment; Pecherie mixre; Golfe de Gascogne; Modele bio economique; Simulation; Langoustine; Merlu; Stratégie des flottilles; Gestion des pêcheries.
Ano: 1988 URL: http://archimer.ifremer.fr/doc/1988/rapport-2569.pdf
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Observations françaises sur les nurseries du merlu du golfe de Gascogne au nord-ouest de l'Irlande. Essai de synthèse ArchiMer
Guichet, Roger.
Depuis 1965, 19 campagnes de la Thalassa ont été consacrées en totalité ou en partie à l'étude des nurseries du merlu. Plusieurs de ces campagnes ont fait l'objet de notes au CIEM. Dans ce papier nous nous proposons de tenter une synthèse des observations concernant la répartition des premiers groupes d'âge du merlu et, si possible, de calculer l'importance relative des différentes nurseries
Tipo: Text Palavras-chave: Campagne de la Thalassa; Merlu; Nurserie; Répartion géographique.
Ano: 1977 URL: http://archimer.ifremer.fr/doc/00143/25385/23523.pdf
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Pêcheries bigoudenes. Bilan des connaissances Activités de pêche, Ressources, Gestion ArchiMer
Biseau, Alain; Maguer, Cedric; Sanz Aparicio, Céline.
Located at the far south-west of Brittany, the pays bigouden is the first of the French maritime regions in terms of landed value and the second one in weights. The bigouden fishing practices are characterised by a large diversity of target species and métiers. Studying the fishing practises leads to a description of the various métiers and fishing strategies together with their trends over the last ten years. Identification of métiers is based on multifactors analysis. Using a classification method based on thresholds of species landings then allows a more objective analysis and leads to a more quantitative characterisation of the trawl métiers, which represent more than 80% of the total fishing activity of this region. Two métiers are based on Nephrops...
Tipo: Text Palavras-chave: Sole; Cardine; Baudroie; Merlan; Morue; Merlu; Langoustine; Reglementation; Gestion; Évaluation de stock; Métiers; Pays Bigouden; Sole; Medrim; Lophius; Monk; Blue whiting; Gadus; Cod; Hake; Nephrops; Prawn; Regulation; Fishing management; Stock assessment; Metiers; South West Brittany.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/rapport-2505.pdf
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Rationalisation de l'échantillonnage biologique pour l'évaluation des stocks des pêcheries marines en golfe de Gascogne ArchiMer
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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Une technique pour faciliter la lecture des otolithes des merlus (Merluccius merluccius) de grande taille ArchiMer
Quero, Jean-claude; Labastie, Jacques.
Les estimations de la croissance du merlu sont fondées sur la lecture des otolithes (sagitta). Toutefois, chez ce poisson, le dénombrement des anneaux annuels est plus difficile que chez la plupart des autres Gadiformes, car ils sont dédoublés, peu marqués, voir invisibles.
Tipo: Text Palavras-chave: Otolithes; Merlu; Merluccius merluccius; Estimation croissance.
Ano: 1973 URL: http://archimer.ifremer.fr/doc/00143/25389/23538.pdf
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