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A comparative analysis of métiers and catch profiles for some French demersal and pelagic fleets ArchiMer
Marchal, Paul.
A quantitative comparison between metiers and resulting catch profiles was carried out for seven French demersal and pelagic fleets operating in the North Sea, the eastern Channel, and the Bay of Biscay. Typologies for four metiers have been attempted, based on different factors (gear, mesh size, fishing ground, and/or a priori target species), data sources (logbooks or harbour enquiries), and aggregation levels. Catch profiles were selected through cluster analysis. The linkage between metiers and catch profiles was quantified using uncertainty coefficients, which depended on the metier typology being used and the fleet under consideration, but were not subject to substantial inter- or intra-annual fluctuations. Future catch profiles and metiers were...
Tipo: Text Palavras-chave: Uncertainty coefficients; Metiers; Fleets; Fishing intention; Catch profiles.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4075.pdf
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A comparative review of fisheries management experiences in the European Union and in other countries worldwide: Iceland, Australia, and New Zealand ArchiMer
Marchal, Paul; Andersen, Jesper Levring; Aranda, Martin; Fitzpatrick, Mike; Goti, Leyre; Guyader, Olivier; Haraldsson, Gunnar; Hatcher, Aaron; Hegland, Troels Jacob; Le Floc H, Pascal; Macher, Claire; Malvarosa, Loretta; Maravelias, Christos D.; Mardle, Simon; Murillas, Arantza; Nielsen, J. Rasmus; Sabatella, Rosaria; Smith, Anthony D. M.; Stokes, Kevin; Thoegersen, Thomas; Ulrich, Clara.
This study compares the details and performance of fisheries management between the EU and a selection of other countries worldwide: Iceland, New Zealand, and Australia, which are considered in many respects to be among the most advanced in the world in fisheries management. Fisheries management in the EU, Iceland, Australia, and New Zealand has developed following different paths, despite being based on similar instruments and principles. Iceland, Australia, and New Zealand have been at the forefront of developing management practices such as stakeholder involvement, legally binding management targets (Australia, New Zealand), individual transferable quotas, and discard bans (Iceland, New Zealand). The EU has since the beginning of the 21st century taken...
Tipo: Text Palavras-chave: Australia; Comparative review; European Union; Fisheries management; Iceland; New Zealand.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00312/42305/41699.pdf
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A comparative review of the fisheries resource management systems in New Zealand and in the European Union ArchiMer
Marchal, Paul; Lallemand, Philippe; Stokes, Kevin; Thebaud, Olivier.
This review aims at comparing the fisheries management systems existing in New Zealand and in the European Union. The involvement of stakeholders at all stages of the management process is generally more transparent and better established in New Zealand than in the EU. Both systems aim at achieving an adequate balance between sustainability and utilisation and consider the precautionary approach as a founding principle. The social objectives are probably more explicit in the EU management system. In New Zealand, B-MSY is a legal management target for all stocks in the quota management system (QMS), but management strategies were poorly explicit until most recently. In the EU, there have not been any legal management targets or strategies until 1999. Since...
Tipo: Text Palavras-chave: Fisheries; Total allowable catches; Rights based management; Quota; Atlantic Ocean; Pacific Ocean.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11167/7534.pdf
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A dynamic model of the Bay of Biscay pelagic fleet simulating fishing trip choice: the response to the closure of the European anchovy (Engraulis encrasicolus) fishery in 2005 ArchiMer
Vermard, Youen; Marchal, Paul; Mahevas, Stephanie; Thebaud, Olivier.
The scope of this paper is to describe, evaluate, and forecast fishing trip choices of the Bay of Biscay pelagic fleet using random utility modeling (RUM). First, alternative fishing trip choices of this fleet were identified using multivariate statistical methods based on species landings weighted by value and defined as distinct fishing activity or fisheries (termed metiers). A RUM was specified, which included trip components as attributes during the period 20012004 ( a lagged percentage of the value per unit of effort of the main species caught, total value per unit of effort, and inertia in terms of changes from one metier to another). For the main metiers, the proportion of correct effort allocation is 90% during the calibration period of 2001-2004....
Tipo: Text Palavras-chave: Management; Métier; Fishing effort; Fisher's behavior; RUM.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6096.pdf
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Adaptive responses of tropical tuna purse-seiners under temporal regulations ArchiMer
Torres-irineo, Edgar; Dreyfus-leon, Michel; Gaertner, Daniel; Salas, Silvia; Marchal, Paul.
The failure to achieve fisheries management objectives has been broadly discussed in international meetings. Measuring the effects of fishery regulations is difficult due to the lack of detailed information. The yellowfin tuna fishery in the eastern Pacific Ocean offers an opportunity to evaluate the fishers’ responses to temporal regulations. We used data from observers on-board Mexican purse-seine fleet, which is the main fleet fishing on dolphin-associated tuna schools. In 2002, the Inter-American Tropical Tuna Commission implemented a closed season to reduce fishing effort for this fishery. For the period 1992–2008, we analysed three fishery indicators using generalized estimating equations to evaluate the fishers’ response to the closure. We found...
Tipo: Text Palavras-chave: Closed season; Eastern tropical Pacific; Fisher behaviour; Purse-seine fishing; Tropical tuna.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00360/47088/48565.pdf
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Alimentation de la sole et de la plie en Manche ArchiMer
Cresson, Pierre; Timmerman, Charles-andre; Couvreur, Clemence; Denamiel, Margaux; Lepretre, Marie-anais; Marchal, Paul.
This document summaries major results about the diet of sole Solea solea and plaice Pleuronectes platessa in the English Channel, collected in the framework of the VARITROPH project. Both species have a similar diet, based on crustaceans, but plaice exhibit a larger diversity of secundary species (bivalves, annelids and echinoderms) than sole (annelids only). Diversity of the preys for plaice is explained by differences between size classes. Diet of small individuals is less diverse than the diet of large individuals. Trophic similarity between sole and plaice is also exhibited when comparing ontogenic changes of trophic levels, that are pretty similar for both species, and consistent with a diet based on small invertebrates.
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Ano: 2021 URL: https://archimer.ifremer.fr/doc/00675/78718/80904.pdf
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Alimentation du maquereau en Manche ArchiMer
Cresson, Pierre; Timmerman, Charles-andre; Cordier, Remy; Couvreur, Clemence; Denamiel, Margaux; Engler, Alexandra; Lebon, Fabien; Lepretre, Marie-anais; Marchal, Paul.
This document summaries major information about the diet of mackerel Scomber scombrus in the English Channel, collected during the VARITROPH project. Mackerel consume quite exclusively copepods, with low effect of size on both diet and trophic level.
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Ano: 2021 URL: https://archimer.ifremer.fr/doc/00675/78716/80902.pdf
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Alimentation du merlan en Manche ArchiMer
Cresson, Pierre; Timmerman, Charles-andre; Denamiel, Margaux; Millet, Lucie; Marchal, Paul.
This document summaries the major findings about the diet of whiting Merlangius merlangus in the English Channel, in the framework of the VARITROPH project. Whiting diet is based on several main preys, with an ontogenic variation. Individuals lower than 30 cm mostly fed on crustaceans, while diet of larger individuals is based on cephalopods and fishes. As a result, trophic level show 2 phases, one increasing at the early life stages, and a constant trophic level for individuals larger than 30 cm.
Tipo: Text
Ano: 2021 URL: https://archimer.ifremer.fr/doc/00675/78717/80903.pdf
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An investigation of human vs. technology-induced variation in catchability for a selection of European fishing fleets ArchiMer
Mahevas, Stephanie; Vermard, Youen; Hutton, Trevor; Iriondo, Ane; Jadaud, Angelique; Maravelias, Christos D.; Punzon, Antonio; Sacchi, Jacques; Tidd, Alex; Tsitsika, Efthymia; Marchal, Paul; Goascoz, Nicolas; Mortreux, Serge; Roos, David.
The impact of the fishing effort exerted by a vessel on a population depends on catchability, which depends on population accessibility and fishing power. The work investigated whether the variation in fishing power could be the result of the technical characteristics of a vessel and/or its gear or whether it is a reflection of inter-vessel differences not accounted for by the technical attributes. These inter-vessel differences could be indicative of a skipper/crew experience effect. To improve understanding of the relationships, landings per unit effort (lpue) from logbooks and technical information on vessels and gears (collected during interviews) were used to identify variables that explained variations in fishing power. The analysis was undertaken by...
Tipo: Text Palavras-chave: Catchability; Fishing power; GAM; GLM; Skipper skill; Technical characteristics.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00049/16043/15172.pdf
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Area-based management and fishing efficiency ArchiMer
Marchal, Paul; Ulrich, Clara; Pastoors, M.
The scope of this study is to investigate the extent to which area-based management may have influenced the fishing efficiency of the Danish and Dutch demersal fleets harvesting cod, plaice and sole in the North Sea. Special consideration is given to the 'plaice box', a restricted area where fishing is prohibited to towed-gear fleets of horsepower exceeding 300 hp. An index of fishing power is calculated as the log-ratio between the catch per unit effort (CPUE) of any vessel and some survey abundance index. Annual trends in fishing are calculated as the year-effect derived from a general linear model (GLM) analysis of the index of fishing power. The fishing efficiency of Danish gill-netters and, to some extent, Danish seiners, has overall increased inside...
Tipo: Text Palavras-chave: Fishing efficiency; Plaice box; Fisheries management; North Sea; Demersal fisheries.
Ano: 2002 URL: https://archimer.ifremer.fr/doc/00589/70118/68112.pdf
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Bio-economic management strategy evaluation of deepwater stocks using the FLBEIA model ArchiMer
Garcia, Dorleta; Urtizberea, Agurtzane; Diez, Guzman; Gil, Juan; Marchal, Paul.
Deepwater fish are characterized by long lifespans, late maturity and low productivity. This implies slow recovery from low biomass levels and it is, therefore, important to manage these stocks correctly to avoid overfishing. However, these stocks are generally data poor, which it makes difficult to apply quantitative assessment models on which to base their management. The management strategy evaluation (MSE) approach consists in evaluating the performance of management strategies by simulation before their implementation. In the evaluation, the main sources of uncertainty in a fishery system and its management process should be taken into account in order to find robust management strategies. Thus, the MSE approach is relevant to the management of...
Tipo: Text Palavras-chave: Bio-economic modelling; Deep-sea fisheries; Harvest control rules; Management strategy evaluation; Norway; Bay of Biscay; Gibraltar; Atlantic Ocean.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00176/28760/27231.pdf
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Campagne BERYX 10 de pêche à la palangre de fond sur trois monts sous-marins du sud-est de la zone économique de Nouvelle-Calédonie. (N.O."Alis", 18 au 27 Août 1992) IRD
Lehodey, Patrick; Marchal, Paul; Gallois, Francis; Nauges, Carole.
BERYX 10 fut la dixième campagne d'une série consacrée à l'étude des ressources halieutiques des monts sous-marins situés au sud-est de la Nouvelle-Calédonie. 8 pêches furent réalisées sur les monts B, K et D avec une palangre de fond du même type que celle qui fut mise en oeuvre par le palangrier "Humboldt". Un total de 6000 hameçons fut mis à l'eau. La diversité des prises (16 espèces) fut du même ordre que celle des campagne précédentes de pêche à la palangre de fond. Le rendement moyen en #Beryx$ fut 11.9 kg / 100 hameçons. Les autres espèces bien représentées furent #Rexe ante furcata$, #Etmopterus lucifer$ et #Squalus$ cf. #megalops$. Les prises firent l'objet de mensurations et de prélèvements (gonades et estomacs). 41 traits de filet à plancton...
Tipo: Text Palavras-chave: OCEANOGRAPHIE DES PECHES; RESSOURCES HALIEUTIQUES; POISSON MARIN; PECHE EXPERIMENTALE; GUYOT; ENGIN PECHE; PALANGRE DE FOND; CHALUT PELAGIQUE; ZONE ECONOMIQUE EXCLUSIVE; PECHE PROFONDE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:37733
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Campagne BERYX 4 de pêche à la palangre de fond et aux casiers dans le sud-est de la Nouvelle-Calédonie (N.O. "Alis", 20-23 janvier 1992) IRD
Grandperrin, René; Lehodey, Patrick; Marchal, Paul.
Beryx 4 se déroula dans le sud-est de la Nouvelle-Calédonie, au sud de l'île des Pins. Les objectifs de cette courte campagne étaient : recherche de #Beryx$ spp. dans cette zone à l'aide d'une palangre de fond, capture aux casiers de #Nautilus macromphalus$, essais de la sonde CTD. La ligne fut la même que celle qui fut utilisée lors des précédentes campagnes Beryx; 3 poses de 750 hameçons chacune furent réalisées à des profondeurs de 300, 400 et 600 m; aucun #Beryx$ ne fut capturé et les prises commerciales furent nulles à 400 et 600 m; les prises à 300 m comprenaient quelques #Lutjanidae$ (#Etelis$ spp. et #Pristipomoides$ spp.); l'ensemble de la campagne permit la récolte de 15 espèces différentes. 30 casiers parallélipipédiques furent mis à l'eau (10...
Tipo: Text Palavras-chave: PECHE EXPERIMENTALE; PALANGRE; CASIER; RESSOURCES HALIEUTIQUES; POISSON MARIN; CAMPAGNE OCEANOGRAPHIQUE; COMPOSITION DES PRISES.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:35592
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Campagne BERYX 5 de pêche à la palangre de fond sur deux monts sous-marins du sud-est de la zone économique de Nouvelle Calédonie (N.O. "Alis", 28 janvier - 6 février 1992) IRD
Lehodey, Patrick; Marchal, Paul; Mou-Tham, Gérard; Panche, Jean-Yves.
BERYX 5 fut la cinquième campagne d'une série consacrée à l'étude des ressources halieutiques des monts sous-marins situés au sud-est de la Nouvelle Calédonie. 8 pêches furent réalisées sur les monts B et K avec une palangre de fond du même type que celle qui fut mise en oeuvre par le palangrier "Humboldt". Un total de 8000 hameçons fut mis à l'eau. La diversité des prises (15 espèces) fut du même ordre que celle des campagnes précédentes de pêche à la palangre de fond. Les rendements en #Beryx$ furent excellents sur le mont B. Les autres espèces bien représentées furent #Rexea antefurcata$ et #Centrophorus sp.$. Les prises firent l'objet de mensurations et de prélèvements (gonades et estomacs). La bathymétrie réalisée sur le mont K a mis en évidence une...
Tipo: Text Palavras-chave: OCEANOGRAPHIE DES PECHES; POISSON MARIN; ZONE DE PECHE; GUYOT; ZONE ECONOMIQUE EXCLUSIVE; PECHE EXPERIMENTALE; TECHNIQUE DE PECHE; PALANGRE; ANALYSE QUANTITATIVE.
Ano: 1992 URL: http://www.documentation.ird.fr/hor/fdi:36660
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Catch-quota balancing in mixed-fisheries: a bio-economic modelling approach applied to the New Zealand hoki (Macruronus novaezelandiae) fishery ArchiMer
Marchal, Paul; Francis, Chris; Lallemand, Philippe; Lehuta, Sigrid; Mahevas, Stephanie; Stokes, Kevin; Vermard, Youen.
Managing adequately the exploitation of commercial species subject to technical interactions is a key step towards the ecosystem approach to fisheries. We evaluate here, using a bio-economic modelling approach building on the ISIS-Fish simulation platform, the relative impact of total allowable commercial catches (TACC) and of taxes applicable to over-quota landings (deemed value) on the sustainability of a selection of species exploited by the New Zealand hoki (Macruronus novaezelandiae) fishery. We investigate some aspects of the hoki mixed fisheries, consisting of four fleets and nineteen metiers, by considering the technical interactions between hoki and Southern hake (Merluccius australis). The dynamics of effort allocation were modelled using gravity...
Tipo: Text Palavras-chave: Fleet dynamics; New Zealand hoki fishery; Deemed value; Fisheries management.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11168/7521.pdf
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Channel and North Sea ray stock assessment in a data limited framework ArchiMer
Amelot, Morgane; Bastleer, Jurgen; Foucher, Eric; Girardin, Raphael; Marchal, Paul; Poos, Jan Jaap; Sys, Klaas.
Rajidae stocks (Raja clavata, Raja brachyura, Raja montagui, Raja microocellata, Leucoraja naevus and Raja undulata) in the English Channel and North Sea (ICES divisions 3a, 4 and 7d) are actually managed as a complex (“skates and rays”) and subject to a single TAC. TAC advices from the ICES are based on scientific survey indices trends from each species. Rajidae catches are mainly bycatch from flatfish fisheries such are sole (Solea solea) and plaice (Pleuronectes platessa) fisheries. Furthermore, because of their top predator position as well as their life history, Rajidae are species sensitive to overfishing. These different factors have led to a revision in stock assessment methods. ICES classified Rajidae as category 3 data limited stocks. The lack of...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00620/73220/72433.pdf
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Combining fleet dynamics and population dynamics for a volatile fishery: the example of the anchovy fishery of the Bay of Biscay ArchiMer
Vermard, Youen; Lehuta, Sigrid; Mahevas, Stephanie; Thebaud, Olivier; Marchal, Paul; Gascuel, Didier.
It is increasingly recognized that fisher‟s behavior should be taken into account to understand and predict fishery dynamics, in particular in response to management. ISIS-Fish is a spatially and seasonally explicit modeling framework especially designed to couple populations and fleets dynamics and explore the impact of various management measures on mixed fisheries. It has already been set up using a static fishing effort allocation (corresponding to an average historical pattern) between the various métiers to simulate the pelagic fishery in the Bay of Biscay. We present here the integration of a fleet dynamics model. This model is derived from a Random Utility Model simulating métiers choice using as explanatory variables the past value per unit...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00107/21858/19449.pdf
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Defining a pelagic typology of the eastern English Channel ArchiMer
Delavenne, Juliette; Marchal, Paul; Vaz, Sandrine.
Classifying marine habitats is a growing research field and is of increasing interest to spatial planners and managers. Most studies have predominantly focused on the seabed to determine benthic habitat types, and only limited attention has been paid to the water column. Classification projects aim at identifying candidate management units for the application of various regional or national regulations such as the European Water Framework Directive. Here, we propose a seasonal classification of the water column in the eastern English Channel, which we validated with biological data. For the three tested compartments, phytoplankton, zooplankton and pelagic fishes, the validation results were satisfactory, with recall values (i.e. percentage of observations...
Tipo: Text Palavras-chave: Eastern English Channel; Pelagic typology; Clustering analysis; Seasonality.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00125/23655/22689.pdf
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Developing a multispecific stocks MSE framework : English Channel and North Sea Rajidae complex ArchiMer
Amelot, Morgane; Batsleer, Jurgen; Foucher, Eric; Girardin, Raphael; Marchal, Paul; Poos, Jan Jaap; Sys, Klaas.
Six Rajidae stocks (Raja clavata, Raja brachyura, Raja montagui, Raja microocellata, Leucoraja naevus and Raja undulata) are currently exploited in the English Channel and North Sea area (ICES divisions 3a, 4 and 7d) and subject to a TAC regulation. This TAC is set based on monospecific approaches (abundance indices) when mangement is complex based. However, stock status disparities exist between these species. In this context a multispecific MSE (Management Strategy evaluation) framework has been developped based on DLMTool package from R. The main objective was to estimate the complex management impact at the different steps of stocks management (data collect, assessment, management measures implementation). The species species assessement and ...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00652/76423/77495.pdf
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Dynamique de la mortalité par pêche et impact sur la gestion des ressources halieutiques ArchiMer
Marchal, Paul.
Ce mémoire présente une contribution à la recherche sur la dynamique de la mortalité par pêche (F) et son impact sur la gestion des ressources halieutiques. La première étape de cette démarche a été de réduire la complexité des systèmes halieutiques étudiés, en regroupant les bateaux et leurs activités en flottilles et métiers respectivement. Plusieurs méthodes existent pour définir les métiers, certaines basées sur les variables d’entrée (engin, zone de pêche, espèces cibles), d’autres sur les variables de sortie (profils de capture). Une comparaison de ces méthodes pour les flottilles françaises indique que les meilleures correspondances sont obtenues pour les flottilles les plus sélectives (e.g., chalutiers pélagiques, fileyeurs). Une fois les...
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00031/14251/11535.pdf
Registros recuperados: 64
Primeira ... 1234 ... Última
 

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