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| Registros recuperados: 35 | |
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| Robert, Marianne; Cortay, Aurore; Morfin, Marie; Simon, Julien; Morandeau, Fabien; Deneubourg, Jean Louis; Vincent, Benoit. |
| Knowledge about fish behavior is crucial to be able to influence the capture process and catch species composition. The rapid expansion of the use of underwater cameras has facilitated unprecedented opportunities for studying the behavior of species interacting with fishing gears in their natural environment. This technological advance would greatly benefit from the parallel development of dedicated methodologies accounting for right-censored observations and variable observation periods between individuals related to instrumental, environmental and behavioral events. In this paper we proposed a methodological framework, based on a parametric Weibull mixture model, to describe the process of escapement attempts through time, test effects of covariates and... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00663/77553/79457.pdf |
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| Leonardi, Sophie; Rubin, Alex; Meillat, Marc; Coppin, Franck; Delpech, Jean-paul; Morandeau, Fabien; Larnaud, Pascal. |
| Ce rapport fait la synthèse des travaux réalisés en 2008 et en 2009 au cours du programme Selecmer. Celui-ci, réalisé à l'initiative des professionnels de la pêche en partenariat avec l'Ifremer, avait pour objectif de travailler à améliorer la sélectivité du chalut de fond qu'ils utilisent afin de diminuer les rejets des individus hors-tailles1, en particulier pour le merlan, tout en limitant les pertes commerciales immédiates. Une première phase a consisté à tester l'efficacité de fenêtres à mailles carrées. La deuxième phase a eu pour objectif de développer une grille sélective. Des essais en bassin et des campagnes vidéo en mer ont permis d'apporter des ajustements aux dispositifs sélectifs. L'ensemble des essais de sélectivité à bord des navires de... |
| Tipo: Text |
Palavras-chave: Professional fishermen; Square mehs; Flume tank; Selective grid; North Sea; Channel; Bottom trawl; Selectivity; Fishing; Professionnels; Mailles carrées; Campagnes à la mer; Bassin d'essais; Grille sélective; Mer du Nord; Manche; Chalut de fond; Sélectivité; Pêche. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/rapport-6776.pdf |
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| Mehault, Sonia; Morandeau, Fabien; Goascoz, Nicolas. |
| Dans le cadre de la mise en place de mesures de gestion visant à préserver le stock de cabillaud de mer Celtique, la DPMA a sollicité l’expertise de l’Ifremer pour analyser les informations disponibles sur le dispositif sélectif prévu par l’article 13 « Remedial measures for cod and whiting in the Celtic Sea » : le « Raised Fishing Line » (RFL). Ce dispositif aurait pour but d’éviter les captures de cabillaud et s’adresserait aux flottilles chalutières ciblant plus de 20% d’églefin dans la zone de protection de la mer Celtique. A notre connaissance, ce dispositif RFL est décrit dans deux rapports rédigés en 2017 et 2019 par la Ireland’s Seafood Development Agency (BIM) et dans une publication scientifique de 2010 parue dans le journal « Fisheries Research... |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00615/72695/71699.pdf |
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| Morandeau, Fabien. |
| Influence of the nature of the twine on the codend selectivity: Reminder: During the “SELECT 12” campaign in April 1996, we demonstrated that the nature of the material used for the manufacture of the trawl codend has an influence on the selectivity. Results showed that the use of single twine made of polyamide in the codend was more selective on hake and Nephrops than single twine made of polyethylene. Nevertheless single twine made of polyamide codend loses “flexibility” with use and therefore a study should be done to investigate its impact on selectivity (fishermen do not often use this equipment: however this 150 mesh net is particularly selective and it would be premature to discard it). Influence of the diameter of the twine and the mesh number on... |
| Tipo: Text |
Palavras-chave: Sélectivité des culs de chalut. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00347/45786/45760.pdf |
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| Biseau, Alain; Le Mao, Patrick; Sartoretto, Stephane; Tourolle, Julie; Menot, Lenaick; Fabri, Marie-claire; Larnaud, Pascal; Drogou, Mickael; Morandeau, Fabien; Vacherot, Jean-philippe; Vermard, Youen. |
| Tipo: Text |
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| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00300/41147/41077.pdf |
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| Loaec, Henri; Morandeau, Fabien; Meillat, Marc; Davies, Peter. |
| There are different approaches to selectivity, including increasing cod-end mesh size, square mesh panels and rigid grids. Selectivity grids have traditionally been produced to be as rigid as possible to maintain spacing but this can result in heavy, expensive grids, handling problems and brittleness. This paper presents an alternative approach using flexible polyurethane polymers to produce lightweight inexpensive grids with much improved damage tolerance and ease of handling, which also possess interesting selectivity characteristics. The material selection, design and development tests are described first, then preliminary sea trial results are presented. A flexible grid with a 20 mm spacing between bars performed successfully and enabled a reduction in... |
| Tipo: Text |
Palavras-chave: Damage resistance; Polyurethane; Nephrops; Grid; Size selection; By catch; Selectivity. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1690.pdf |
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| Morandeau, Gilles; Morandeau, Fabien; Duclercq, Benoit. |
| Scampi (Nephrops norvegicus) is traditionally fished with bottom trawls on muddy grounds. Some trawlers from Bayonne fish it from May to August in the south of the Bay of Biscay. The Capbreton area is partly forbidden to trawling and net fishing (see appendix 1) In spring and summer, it is frequented by a fleet of about fifteen vessels, among which are some lining vessels, fishing hake, and a few pot vessels, targeting crabs. Some of these vessels could be interested in using scampi traps in this area in order to be more versatile and, to a certain extent, to diminish their economical vulnerability through a diversification of the revenues generated by another high market value species. Ifremer offered to assess a new tool: scampi trap, on the Basque and... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/rapport-3470.pdf |
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| Mehault, Sonia; Larnaud, Pascal; Rimaud, Thomas; Cuillandre, Jean-pierre; Morandeau, Fabien; Simon, Julien; Vacherot, Jean-philippe. |
| The landing obligation implemented under the Common Fisheries Policy promoted the development of fishing gear selective devices. The REDRESSE project conducted in the Bay of Biscay was the opportunity for trawl fleets targeting cephalopods, Nephrops and demersal fish to continue to test various selective configurations to reduce their discards levels. The sea trials were carried out onboard of commercial fishing vessels and the experimental tows were sampled by an observer. Most of the selective devices were tested under the twin trawl method, with on one side the gear to be tested and on the other, the standard commercial gear. Other devices were tested with the parallel or alternate haul method. The data obtained were used to describe the catch species... |
| Tipo: Text |
Palavras-chave: Pêcherie langoustinière; Pêcherie poisons/céphalopode; Grande Vasière; Golfe de Gascogne; Sélectivité; Chalut; Rejets; Nephrops fishery; Fish/cephalopods fishery; Grande Vasière; Bay of Biscay; Trawl selectivity; Discards. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00457/56847/58681.pdf |
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| 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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| 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... |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00255/36628/79501.pdf |
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| Merillet, Laurene; Kopp, Dorothee; Morandeau, Fabien; Mehault, Sonia; Rimaud, Thomas; Piton, C. |
| In the context of the reform of the Common Fishing Policy (CFP) undertaken by the European Union and implemented since 1st January 2014, the discarding of unwanted catches will gradually be forbidden. Article 15 of the CFP lays down a landing obligation for all species subject to European quotas and will come into force between 2015 and 2019 according to the species and the zones. The Regulation allows several exemptions including one for "species for which scientific proof shows high survival rates, due to the characteristics of the fishing gear, the fishing methods and the ecosystem" (EU Regulation No. 1380/2013). In particular, Nephrops were identified by the International Council for the Exploration of the Sea (ICES) as one of the species having the... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00378/48953/49357.pdf |
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| Vogel, Camille; Kopp, Dorothee; Morandeau, Fabien; Morfin, Marie; Mehault, Sonia. |
| In the English Channel and Southern Bight, French demersal trawlers target a mix of demersal species including whiting (Merlangius merlangus). The discard ban to be implemented in January 2016 motivated fishermen to look for technical measures to reduce unwanted catches of undersized individuals (<27 cm). From 2008–2014, 18 different gear configurations were tested for bycatch reduction on board fleets of vessels of 16–20 m and 20–24 m. Selective devices tested included grids, square mesh panels (SMP), square mesh cylinders (SMC), various combinations of these devices and large mesh trawls. Using the catch comparison method, our results focus on six devices that proved efficient to reduce catches of undersized whiting, equally divided between the two... |
| Tipo: Text |
Palavras-chave: Square mesh; Sorting grids; Fishing gear technology; Merlangius merlangus; Catch comparison; GLMM. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00384/49553/50079.pdf |
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| Vincent, Benoit; Simon, Julien; Vacherot, Jean-philippe; Morandeau, Fabien; Larnaud, Pascal; Kopp, Dorothee; Mehault, Sonia; Morfin, Marie; Savina-rolland, Marie; Marc, Emilie. |
| The Lorient flume tank is an hydrodynamic facility available for any qualification and observation of submerged objects in still or moving water. It is a closed loop circulating tank filled with fresh water. The fluid is moved with a 70 kW pump-motor with a velocity between 0 and 1 m/s and homogenized with a series of pressure drop systems. The overall dimensions are 24.50 m long, 7.50m wide and 3.30 m high. The part where experiments can be set up is 12m long, 2.6 m wide and 1.5 m deep. A mobile bottom belt can be synchronized with the water flow velocity and enables to simulate the seabed velocity relatively to a towed object. The overall process of the facility is controlled by a user friendly interface. |
| Tipo: Text |
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| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00436/54803/56299.pdf |
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| Morandeau, Gilles; Sanchez, Florence; Caill-milly, Nathalie; Morandeau, Fabien. |
| Le projet LOUPE a pour objectif général d’acquérir des données complémentaires relatives aux pêcheries à partir d’observations à la mer sur des navires professionnels, avec le recueil de données spatialisées de l’effort de pêche et des captures associées (commerciales et rejets). Ces données sont complétées par un questionnaire socio-économique. Le but est de fournir des indicateurs simples prenant en considération les dimensions écologiques, économiques et sociales pour éclairer les choix des gestionnaires et favoriser la mise en œuvre et l’efficacité de la gouvernance pêche dans cet espace. Le projet propose également de mettre en œuvre un système vidéo fixe et autonome (VECOC) pour réaliser des observations vidéo sous-marines et permettre ainsi... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00154/26568/24699.pdf |
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| Registros recuperados: 35 | |
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