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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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A Bayesian two-stage biomass model for stock assessment of data-limited species: An application to cuttlefish ( Sepia officinalis ) in the English Channel ArchiMer
Alemany, Juliette; Rivot, Etienne; Foucher, Eric; Vigneau, Joel; Robin, Jean-paul.
Cuttlefish is a key commercial species in the English Channel fishery in terms of landings and value. Age-based assessment methods are limited by time-consuming age determination with statoliths and the lack of stock assessment models tailored to this data-limited species. A two-stage biomass model is developed in the Bayesian state-space modelling framework that allows inferences to be made on the stock biomass at the start, middle and end of each fishing seasons between 1992 and 2014, while accounting for both process and measurement errors and to assimilate various sources of information. A method that uses ancillary length-frequency data is developed to provide an informative prior distribution for the biomass growth rate parameter g (E = 0.89) and its...
Tipo: Text Palavras-chave: English Channel; Cuttlefish; Sepia officinalis; Bayesian state-space model; Data-limited stock; Two-stage biomass model.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00376/48766/49289.pdf
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A hierarchical Bayesian model for embedding larval drift and habitat models in integrated life cycles for exploited fish ArchiMer
Rochette, Sebastien; Le Pape, Olivier; Vigneau, Joel; Rivot, Etienne.
This paper proposes a hierarchical Bayesian framework for modeling the life cycle of marine exploited fish with a spatial perspective. The application was developed for a nursery-dependent fish species, the common sole (Solea solea), on the Eastern Channel population (Western Europe). The approach combined processes of different natures and various sources of observations within an integrated framework for life-cycle modeling: (1) outputs of an individual-based model for larval drift and survival that provided yearly estimates of the dispersion and mortality of eggs and larvae, from spawning grounds to settlement in several coastal nurseries; (2) a habitat suitability model, based on juvenile trawl surveys coupled with a geographic information system, to...
Tipo: Text Palavras-chave: Eastern Channel (Western Europe); Habitat suitability model; Hierarchical Bayesian model; Hydrodynamic models; Integrated model; Larval drift; Life cycle; Nursery; Recruitment; Sole; Solea solea; Spatially structured.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00161/27243/25454.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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Aménagement des pêches régionales (Baie de Seine) - Rapport d'activité 1990 ArchiMer
Morin, Jocelyne; Legrand, Veronique; Fiant, Liliane; Duval, P.; Giret, Marc; Lemoine, M.; Miossec, Dominique; Tetard, Alain; Vigneau, Joel.
Dans le cadre contractuel du Plan Etat-Région de Basse-Normandie, plusieurs actions d'intérêt régional ont été menées de 1984 à 1988 sur : - la pêcherie de praires et bivalves du Cotentin ouest, - les pêcheries côtières de homard, seiche, buccin de la côte du Cotentin ouest, - l'exploitation des gisements de moule du Cotentin est, - la gestion des ressources en coquilles Saint-Jacques de baie de Seine. Ces travaux ont contribué à la définition et à la mise en place de règles d'exploitation et à mieux cerner certaines ressources potentielles telles que les bivalves autres que ceux classiquement exploités. Le programme proposé pour la période 1989-1993 a eu pour objectif majeur d'accompagner la Région dans son effort de gestion de sa pêche et de ses...
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Ano: 1991 URL: http://archimer.ifremer.fr/doc/00076/18682/16312.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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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 d’information sur la coquille Saint-Jacques en baie de Seine et l’éventualité de la mise en place d’une zone de restriction spéciale ArchiMer
Foucher, Eric; Biseau, Alain; Berthou, Patrick; Fifas, Spyros; Forest, Andre; Vigneau, Joel.
La coquille Saint-Jacques en Manche Est, dont la plupart des gisements (baie de Seine étendue, Greenwich, Vergoyer, Bassurelles…) sont vraisemblablement inter-connectés, est aujourd’hui exploitée par des flottilles de plusieurs états membres de l’UE, selon des systèmes de réglementation différents. Le système d’exploitation français, historiquement basé sur une pêche intense concentrée en période automnale et hivernale, s’oppose radicalement au système anglo-saxon, plus ouvert, reposant davantage sur une exploitation tout au long de l’année, en particulier en été pour alimenter le marché français en noix fraîches, au moment où les français ne pêchent pas. De nombreuses discussions entre représentants professionnels des différents pays (lors des groupes de...
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Ano: 2010 URL: http://archimer.ifremer.fr/doc/00024/13492/10500.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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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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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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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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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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Report of the working group on research needs (SGRN-08-02) : evaluation of 2007 national data collection programs undertaken under Commission Regulation (EC) NO 1639/2001. 30 June - 5 July, 2008, Ispra, Italy ArchiMer
Vigneau, Joel; Zableckis, Sarunas; Dorner, Hendrik; Scientific, Technical and Economic Committee for Fisheries (STECF)..
SGRN-08-02 was held on 30 June to 5 July 2008 in Ispra (Italy). The meeting focussed on the evaluation of 2007 national data collection programs undertaken under Commission Regulation (EC) no 1639/2001. The evaluation of the UK collection program was undertaken during the STECF November 2008 plenary meeting (Addendum to this report). STECF reviewed the report of the SGRN- 08-02 Working Group during its plenary meeting on 3-7 November 2008.
Tipo: Text Palavras-chave: Fishery research; Fisheries policy; Catch of fish; Sea fish; Fishery management; Organisation of research; Data collection; Research report.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00160/27082/25246.pdf
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Review of Guidelines for the National Programs and Technical Reports under the Data Collection Framework. Report of the subgroup on research needs (SGECA/SGRN 09-03), 19-21 october 2009, Ispra ArchiMer
Vigneau, Joel; Raid, Tiit; European Commission, Joint Research Centre, Scientific, Technical and Economic Committee for Fisheries (STECF).
Articles 6(1) and 7(2) of Council Regulation (EC) No 199/2008 state that the evaluation ofboth NP proposals and TRs should be carried out by STECF. Therefore, the guidelines andtemplates should also facilitate SGRN’s evaluation of Member States’ compliance with theDCF. SGRN received a mandate to review these guidelines and templates in its July 2009meeting (SGRN-09-02), and proposed a new structure for both NP proposals and TRs, and atotally revised version of the Standard Tables. The RCMs subsequently provided an in-depthreview of the revised tables. The purpose of the SGRN/ECA-09-03 meeting (Ispra, 19-21October 2009) to review of NP and TR guidelines was to finalise the templates andguidelines, starting from the work done in SGRN in July 2009 and the...
Tipo: Text Palavras-chave: Fishing regulations; Common fisheries policy; Fishery research; Industrial data processing; Research report.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00160/27085/25247.pdf
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Situation en 2011 des ressources exploitées par les flottilles françaises ArchiMer
Biseau, Alain; Bellail, Robert; Bertignac, Michel; Biais, Gerard; Bigot, Jean-louis; Bouche, Ludovic; Bourjea, Jerome; Caro, Anthony; De Casamajor, Marie-noelle; Caill-milly, Nathalie; Drogou, Mickael; Duhamel, Erwan; Fifas, Spyros; Foucher, Eric; Fromentin, Jean-marc; Jadaud, Angelique; Lampert, Luis; Laurans, Martial; Lissardy, Muriel; Lorance, Pascal; Mahe, Jean-claude; Mahe, Kelig; Masse, Jacques; Morandeau, Gilles; Pawlowski, Lionel; Poisson, Francois; Reynal, Lionel; Roos, David; Verin, Yves; Vermard, Youen; Vigneau, Joel.
Ce document présente l'état des principaux stocks exploités par les flottes françaises en termes de mortalité par pêche et de biomasse de reproducteurs. La situation fin 2010 (début 2011) par rapport aux points de référence (de précaution et Fmsy) est indiqué lorsque les indicateurs sont estimés et que les références sont définies. Les grandes tendances en matière d'évolution des mortalités et biomasses sont également indiquées.
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Ano: 2011 URL: http://archimer.ifremer.fr/doc/00035/14656/11956.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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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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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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Strengthening the collaboration between scientists and fishing industry in view of improving scientific advice. Working document addressing the issues to be tackled in the WKDDRAC3 meeting. ArchiMer
Vigneau, Joel; Van Beek, Frans; Lordan, Colm; Lorance, Pascal; Armstrong, Mike; Dalskov, Jørgen; Ullrich, Clara; Moreau, Kelle; Santurtun, Marina; Schon, Peter Jan.
The Third Data Deficiency Coordination Workshop with the RACs (WKDDRAC3), was planned to be chaired by Joël Vigneau (France) and Barrie Deas (UK), at ICES in Copenhagen, Denmark, on 16 January 2013 to: a) Evaluate the progress done after WKDDRAC2 b) Identify the main data issue of the northwest and southwest water stocks and agree on actions to improve data deficiencies; c) Data preparation for ICES stock benchmark meetings;
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00116/22756/25248.pdf
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