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Evaluation de l’impact de la drague à moules sur la sole commune et son renouvellement dans les zones de nourricerie ArchiMer
Vigneau, Joel; Biseau, Alain; Cochard, Marie-laure; Vermard, Youen.
Expression de la demande : La demande d’avis de la part de la Direction Interrégionale de la mer Manche Est – mer du Nord (DIRM-MMN) datant du 25 février 2015 et référencée 25/2015 est présentée en annexe. La demande fait référence à un arrêté d’interdiction faite à une liste d’engins traînants de fond dans les zones de nourricerie en Baie de Seine afin de favoriser la reconstitution des stocks de sole. La liste des engins prohibés (annexe III de l’arrêté) inclut les dragues remorquées par bateau, code DRB selon la nomenclature FAO. Le comité régional des pêches de Basse-Normandie (CRPBN) s’inquiète de cette interdiction, arguant du fait que la zone protégée en baie de Seine occidentale englobe une partie des gisements mouliers de Grandcamp et Ravenoville,...
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Ano: 2015 URL: https://archimer.ifremer.fr/doc/00255/36625/79503.pdf
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Les campagnes d'évaluation du stock de coquilles Saint-Jacques en Manche orientale : méthodologie et estimation des indices d'abondance ArchiMer
Vigneau, Joel; Fifas, Spyros; Foucher, Eric.
The methodology used for obtaining absolute abundance indices for Eastern Channel scallop is described in this paper. For the survey (COMOR), stratified multi-stage random sampling is used. The number of sampled units is computed based on variance estimates from the last survey. Knowledge of gear (Brittany dredge with a diving plate) selectivity and efficiency parameters is required for estimating total exploitable biomass and absolute abundance indices by age and strata. Details of the mathematical development of all estimators are given. A non parametric bootstrap provides confidence intervals for all estimates.
Tipo: Text Palavras-chave: Eastern Channel; Bay of Seine; Dredge; Pecten maximus; Scallop; Survey; Assessment; Manche orientale; Baie de Seine; Drague; Pecten maximus; Coquille Saint Jacques; Campagne; Evaluation.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/rapport-6550.pdf
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A Bayesian two-stage biomass model applied to the English Channel stock of cuttlefish (Sepia officinalis) ArchiMer
Alemany, Juliette; Rivot, Etienne; Foucher, Eric; Vigneau, Joel; Robin, Jean-paul.
Among the English Channel fishery, the importance of cuttlefish stock has increased, following the cephalopods global landings and market trend. An adapted stock assessment model is needed in order to give good management advice with accurate uncertainties. Age based methods in this species are hampered by time consuming age determination with statoliths. A model requiring few data and adapted to the species life-history is therefore proposed. An assessment of this stock was conducted in June 2015 by fitting a two-stage biomass model on a 22 years’ time-series (1992-2014). The use of a Bayesian framework is particularly adapted for decision making, allowing the propagation of uncertainty in the model. It also permits the use of different sources of...
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00379/49066/49514.pdf
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Raising procedures for discards : Sampling theory ArchiMer
Vigneau, Joel.
The "best" raising procedure for discards in fishery science is a method everyone talks about but nobody has ever seen it. The specific workshop on discards (Anon. 2003) proposes formulas that are too simplistic as they do not take into account the within trip variance. The literature is full of attempts and results but they are always specific to particular case studies (Stratoudakis et al, 2001, Cotter et al, 2001) or based on inconsistent hypothesis as demonstrated by Rochet and Trenkel (2005). When some generalities are finally found (Borges et al., 2005), the formulas developed do not correspond to multistage sampling because of the unavailability of essential parameters and because the aim of the study is "not to identify optimum raising procedures"....
Tipo: Text Palavras-chave: Multistage sampling; Raising procedure; Discards.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-2699.pdf
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Stock assessment models for short-lived species in data-limited situations. Case study of the English Channel stock of cuttlefish. ArchiMer
Alemany, Juliette; Foucher, Eric; Rivot, Etienne; Vigneau, Joel; Robin, Jean-paul.
Among the English Channel fishery, the importance of cuttlefish stock has increased, following the cephalopods global landings and market trend. The stock is currently managed at regional scale but not by European regulations, although it is a shared species targeted by French and British fishing fleets at several stages of its life-cycle and across much of its distributional range. An assessment of this stock was conducted in June 2014 by fitting a two-stage biomass model on a 22 years’ time-series (1992-2013). As the assumptions of the model are based on a simplified life-cycle, it would be appropriate to compare the results with outputs from other models in order to obtain reliable biomass estimations. The final aim is to produce reliable management...
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00377/48773/49171.pdf
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Protocole de collecte de données sur le stock de concombre de mer (Curcumaria frondosa) à St-Pierre et Miquelon ArchiMer
Vigneau, Joel; Goraguer, Herle; Foucher, Eric; Simon, Julien.
Tipo: Text
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00680/79220/81726.pdf
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St-Pierre et Miquelon : Perspectives pour une exploitation durable des ressources halieutiques ArchiMer
Vigneau, Joel; Goraguer, Herle; Biseau, Alain; Mahe, Jean-claude; Laurans, Martial; Foucher, Eric.
Ce document présente un bilan des pêcheries de Saint-Pierre et Miquelon et l'état des connaissances sur les principales ressources exploitées par les navires de l'archipel. La distribution géographique de ces ressources (sédentaires dans la ZEE française, à l'échelle du 3Ps, ou plus largement distribuée) implique que les évaluations scientifiques et la gestion s'effectuent au niveau national, dans le cadre d'une collaboration franco-canadienne ou au niveau international (NAFO, ICCAT).
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00125/23636/21488.pdf
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Stock assessment of the English Channel stock of cuttlefish with a two-stage biomass model ArchiMer
Alemany, Juliette; Foucher, Eric; Rivot, Etienne; Vigneau, Joel; Robin, Jean-paul.
Among the English Channel fishery, the importance of cuttlefish stock has increased, following the cephalopods global landings and market trend. The stock is currently managed at regional scale but not by European regulations, although it is a shared species targeted by French and British fishing fleets at several stages of its life-cycle and across much of its distributional range. An assessment of this stock was conducted in June 2014 by fitting a two-stage biomass model on a 22 years’ time-series (1992-2013). We present the last update of cuttlefish stock assessment using the same model on years 1992-2014. As the outputs of the model are sensitive to a fix growth parameter, we explore possibilities to improve the model. The use of a Bayesian framework...
Tipo: Text Palavras-chave: Stock assessment; Short-lived species; Data-limited; Cuttlefish; Sepia officinalis; English Channel; Two-stage biomass model; Bayesian methods.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00377/48774/49172.pdf
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Obsvente. Protocole d’échantillonnage biologique de la pêche maritime française dans les criées ArchiMer
Rostiaux, Emilie; Vastel, Alice; Vigneau, Joel.
L'action Echantillonnages biologiques des captures a pour objet de réaliser des échantillonnages en taille des débarquements des navires de pêche professionnels dans les principaux points de débarquement en France métropolitaine, selon le programme national avalisé par les services de la Commission européenne et dans le cadre plus général de l’action dédiée et dénommée Observation des ventes (acronyme ObsVente). L’objectif est de produire des structures en taille des débarquements des principales espèces commerciales pour les besoins des évaluations de stocks par les Organisations Régionales de Gestion des Pêches (ORGP) et autres instances scientifiques internationales compétentes (comme le CIEM), conformément aux obligations internationales de la...
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Ano: 2016 URL: http://archimer.ifremer.fr/doc/00355/46590/46402.pdf
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The French experience in sampling discards at sea in the European waters ArchiMer
Tetard, Alain; Gaudou, Olivier; Lespagnol, Patrick; Peronnet, Isabelle; Rochet, Marie-joelle; Vigneau, Joel.
This study covered a one year period using onboard observers (117 days at sea). The aim was to sample "métiers" known for their discarding side effects: fixed netting, inshore and offshore trawling. The objectives were (i) the collection of information on the demographic structure of the catches for the main exploited species and (ii) the identification of factors explaining discards, in order to find relevant management measures
Tipo: Text Palavras-chave: Celtic Sea; French trawlers; Sampling; Observers; Discard; Metiers; Mer Celtique; Chalutiers français; Échantillonnage; Observateurs; Rejets; Metiers.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-6129.pdf
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Diagnostic sur l’holothurie (Cucumaria frondosa) de la ZEE de St-Pierre et Miquelon et recommandations de gestion pour 2019 ArchiMer
Foucher, Eric; Vigneau, Joel; Goraguer, Herle.
This scientific report describes the sea cucumber (Cucumaria frondosa) fishery in Saint-Pierre and Miquelon (France). A synthesis of knowledge on the biology and life cycle of this species is presented, as well as a history of the fishery. Using the data collected during the SPM2017-Hal scientific survey conducted in August 2017, as well as data from the professional fishery, both in Saint-Pierre and in Canada, an assessment of the sea cucumber stock and a diagnosis of the state of this stock are carried out. Management objectives for this stock, with a view to its sustainability, are proposed.  
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00681/79333/81845.pdf
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Detecting sampling outliers and sampling heterogeneity when catch-at-length is estimated using the ratio estimator ArchiMer
Vigneau, Joel; Mahevas, Stephanie.
Measuring fish on board fishing vessels or at fish markets to collect data for stock assessment purposes is one of the most straightforward actions carried out by fisheries scientists worldwide. However, such samples are not straightforward to handle and analyse because of their vector-type structure. A generic tool that allows investigation in any multinomial-like sampling scheme is provided, as long as the scheme is built on a ratio estimator, which is the case for most length sampling in the fisheries sector. The use of this tool is discussed using data obtained from two different sampling designs, one consisting of commercial market samples by category and the other on fishing activity or metier. The identification of outliers, misallocated samples, or...
Tipo: Text Palavras-chave: Stratification; Sampling design; Market sampling; Length structure.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2731.pdf
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Eléments de base pour l’élaboration d’un protocole scientifique de suivi de l’abondance sur le long terme du stock de raie brunette Raja undulatade Manche. ArchiMer
Gadenne, Helene; Vigneau, Joel; Tetard, Alain.
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Ano: 2015 URL: https://archimer.ifremer.fr/doc/00299/41027/40142.pdf
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French data processing for assessment working groups ArchiMer
Vigneau, Joel; Girardin, Raphael.
During the flatfish benchmark held in ICES in 2020 (WKFlatNSCS), questions arose on the modifications made recently on two key fields of fisheries data processed by France for providing data to stock assessment groups. These two fields are: • the gap filling method in Age Length Keys • the effort aggregates in support of discards raising procedure Updates of procedures, improvements of R scripts and coding are done permanently, and some of the modifications made in 2019 at the demand of WGNSSK experts had unraveled issues that went undetected until data submission of sol.27.7d full time series for WKFlatNSCS benchmark. These issues may have also impacted the Celtic Sea benchmark (WKCELTIC) and to a lesser extent the WKDEM earlier in the year.  The document...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00613/72482/71448.pdf
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Evaluation de l’impact du chalut à maquereau sur la sole commune et son renouvellement dans les zones de nourricerie ArchiMer
Vigneau, Joel; Biseau, Alain; Cochard, Marie-laure; Morandeau, Fabien; Scavinner, Marion.
Expression de la demande : La demande d’avis de la part de la Direction Interrégionale de la mer Manche Est – mer du Nord datant du 25 février 2015 et référencée 27/2015 est présentée en annexe. La demande fait référence à un arrêté1 d’interdiction faite à une liste d’engins traînants de fond dans les zones de nourricerie en Baie de Seine afin de favoriser la reconstitution des stocks de sole. La liste des engins prohibés (annexe III de l’arrêté) inclut le chalut de fond, codé OTB selon la nomenclature FAO, code utilisé pour les chaluts dits semi-pélagiques à maquereau, qui se trouvent de facto interdits dans les zones considérées. Le comité régional des pêches de Basse-Normandie (CRPBN) s’inquiète de cette interdiction, arguant du fait que ce chalut ne...
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Ano: 2015 URL: https://archimer.ifremer.fr/doc/00255/36628/79501.pdf
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A new statistic for sampling design investigation : an application to length-structured landings sampling ArchiMer
Vigneau, Joel; Mahevas, Stephanie.
Measuring fish on a market or on board a vessel is the most common action taken by biologists all around the world to gather data for stock assessment. The samples coming from this kind of survey are of vector type and are not straightforward to analyse and compare. This paper proposes a generic tool that enables to investigate in any multinomial like sampling scheme. The use of this tool will be discussed based on examples from two different sampling designs. One is a sampling of commercial market categories and the other is a métier based sampling. The research of outliers, misallocated samples or potential bias, the stratification and the analysis of within and between strata variance will be discussed with the objective of constructing the best...
Tipo: Text Palavras-chave: Stratification; Sampling design; Length structure; Market sampling.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/acte-2698.pdf
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Evaluation du stock de coquilles Saint-Jacques de la Manche-Est - Campagne COMOR XXIV N.O. Thalia ArchiMer
Vigneau, Joel; Lemoine, Michel.
Tous les ans depuis 1976, le laboratoire "RESSOURCES HALIEUTIQUES" de PORT-EN-BESSIN effectue une campagne d'évaluation sur les coquilles Saint-Jacques en Manche-Est; Les objectifs en sont une évaluation des stocks avec estimation de la biomasse exploitable, de la qualité du recrutement (prochaine génération à entrer dans les captures) et du pré-recrutement (dernière génération née, non encore accessible aux engins par la taille), et des paramètres de croissance. Toutes ces données servent de support aux décisions de la "commission coquilles" du Comité Régional des Pêches et des Cultures Marines de Basse-Normandie, avant l'ouverture de la saison de pêche. Ce type de campagne a été initialement mis au point par G. de KERGARIOU. En 1990, lors de la campagne...
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Ano: 1994 URL: http://archimer.ifremer.fr/doc/00076/18752/16323.pdf
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Eléments de base pour le renforcement des observations OBSMER du stock de raie brunette (Raja undulata) de Manche. ArchiMer
Gadenne, Helene; Vigneau, Joel; Tetard, Alain; Cornou, Anne-sophie.
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Ano: 2015 URL: https://archimer.ifremer.fr/doc/00299/41028/40145.pdf
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Note sur l'exploitation et la gestion du stock de concombre de mer (Cucumaria frondosa) à St-Pierre et Miquelon ArchiMer
Vigneau, Joel; Biseau, Alain; Goraguer, Herle.
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Ano: 2017 URL: https://archimer.ifremer.fr/doc/00386/49739/50255.pdf
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BESTCLIM. Buccin Espèce SenTinelle pour le CLIMat ArchiMer
Hegron – Mace, Laurence; Legrand, Véronique; Kellner, Kristell; Grangere, Karine; Cochard, Marie-laure; Vigneau, Joel; Daures, Fabienne.
La Baie de Granville représente la première région française et européenne de pêche du buccin. Même si cette ressource génère une activité économique importante à l’échelle de la Normandie avec un volume de 8 800 tonnes, 16.82 millions € en 2014 (source SIH), elle reste néanmoins vulnérable. BESTCLIM a pour objectif de 1) Développer la connaissance du cycle de vie du buccin, 2) Evaluer l’activité de la pêcherie et l’état du stock de buccin en Ouest Cotentin avec des méthodes appropriées, 3) Caractériser les aspects socio-économiques de la pêcherie. L’élévation de la température de l’eau impacte la reproduction du buccin en retardant le déclenchement de la gamétogenèse des mâles. Elle a pour effet de réduire de manière importante l’émission de pontes par...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00422/53394/54435.pdf
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