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| Registros recuperados: 35 | |
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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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| Gatti, Paul; Méhault, Sonia; Morandeau, Fabien; Morfin, Marie; Robert, Marianne. |
| We assessed the impact of an additional 100 mm square mesh cylinder (SMC) on the selective property of the demersal whitefish trawl in the Celtic Sea. Sea trials were conducted on board a French trawler using twin trawl rigging. We tested the effects of the position of the SMC (in front of and behind the mandatory 100 mm square mesh panel) and of the insertion of a dispersive float. Selectivity analysis revealed the 50% retention length () to be greater than the Minimum Conservation Reference Sizes regardless of species (haddock, whiting or megrim) or rigging configuration. Results did not reveal a clear effect of the SMC position. However, the insertion of the float led to a decrease in selection ranges suggesting enhanced contact probabilities with the... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00600/71236/73595.pdf |
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| Jadaud, Angelique; Rouyer, Tristan; Mellon, Capucine; Biseau, Alain; Morandeau, Fabien; Berthou, Patrick. |
| Rappel de la demande (saisine 14-7383) : - sur les données et la qualification de l’état des stocks de merlu et de rouget du golfe du Lion : · Une présentation critique des données scientifiques les plus récentes actuellement disponibles sur la mortalité par pêche et la biomasse du merlu et du rouget et de leur qualité · Une présentation critique des estimations de points de référence limite qui peuvent être faites pour les stocks de merlu et de rouget : biomasse limite (Blim) et biomasse minimum de précaution (Bpa), mortalité par pêche limite (Flim) et mortalité par pêche maximale de précaution (Fpa) et qui pourraient être reprises dans un plan de gestion. - sur les mesures de gestion complémentaires envisageables pour les pêcheries démersales du golfe du... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00255/36590/35150.pdf |
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| Kopp, Dorothee; Coupeau, Yann; Vincent, Benoit; Morandeau, Fabien; Méhault, Sonia; Simon, Julien. |
| Besides understanding the effects of fishing on harvested fish stocks, effects on non-target species, habitats and seafloor integrity also need to be considered. Static fishing gears have often been mentioned as a lower impact fishing alternative to towed gears, although studies examining their actual impact on the seafloor are scarce. In this study, we aimed to describe fish trap movements on the seafloor related to soaking time and trap retrieval. Impacts on the seafloor of lightweight rectangular traps and heavier circular traps were compared. We used 3D video cameras to estimate sweeping motion on the seabed and penetration into the sediment during soaking time. The area and distance swept by each type of trap during retrieval was determined by a... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00643/75526/76409.pdf |
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| Kopp, Dorothee; Morandeau, Fabien; Mouchet, Maud; Vogel, Camille; Mehault, Sonia. |
| In the Bay of Biscay, the selective properties of otter trawls have mainly been studied with regard to single species. However, for bottom trawl multispecific fisheries targeting fish, it remains challenging to find a selective device capable of limiting catches of small individuals of several species without commercial losses. The present study focuses on an innovative technical solution to reduce catches of undersized individuals in a multispecies bottom trawl fishery in the Bay of Biscay. We tested a cylinder made of 100-mm diamond meshes turned at 90°, namely T90 inserted in the extension piece. We present the selectivity results obtained for six commercial species. This device allows the escape of small Solea solea, Trachurus trachurus and... |
| Tipo: Text |
Palavras-chave: Gear technology; Covered codend; Turned mesh; Escape; Discard ban. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00439/55026/56487.pdf |
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| Lamothe, Julien; Larnaud, Pascal; Fiche, Marion; Robert, Marianne; Morandeau, Fabien; Vacherot, Jean-philippe; Scavinner, Marion; Simon, Julien. |
| In the context of the new European Common Fisheries Policy and in particular the Landing Obligation, this report synthesizes the trials which were carried out between 2014 and 2016 on French bottom trawlers operating in the Celtic Sea and Western Channel, to decrease their discards. All the detail of the experiments and their results are attached in the voluminous appendices. After a state of the art and various workshops organized in partnership between fishermen, equipment manufacturers and scientists, 3 basic devices were selected for the trials, according to the main fisheries: - 100 mm square meshes cylinder - SMC - (in addition to the mandatory 100mm and 120 mm square mesh panels - SMP) with or without scaring floats ; - Extension + codend in... |
| Tipo: Text |
Palavras-chave: Sélectivité; Mer Celtique; Cylindre à mailles carrées; T90; Grille à baudroie; Rejets; Églefin; Merlan; Sanglier; Selectivity; Celtic Sea; Square mesh cylinder; T90; Monkfish grid; Discards; Haddock; Whiting; Boarfish. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00403/51488/52084.pdf |
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| Latrouite, Daniel; Antoine, Loic; Cosson, Nathalie; Danel, Patrick; Desaunay, Yves; Dupouy, Herve; Galgani, Francois; Lorance, Pascal; Morandeau, Fabien; Morizur, Yvon; Rivoalen, Jean-jacques; Sacchi, Jacques; Troadec, Herve. |
| The scientific cruise Observhal96 took place in August 4-27, 1996 with the underwater system for exploration and intervention « Cyana » and the support vessel « Suroît ». The goal of this IFREMER first use of a man opereted submersible for a fisheries study was to observe fishes and invertebrates in their environment, as well as fishing gears in operation. All the dives, 2 to 5 hours long, took place off Brittany in Atlantic. Five were shalower than 100 meters, nine between 100 and 200 meters, one at 400 meters and for deeper than 1000 meters. Six dives have been dedicated to in situ study of the impact of fishing gears : observation of the geometry of a monkfish tramel net and analysis of losses during hauling ; tracks of a bottom trawl and relative... |
| Tipo: Text |
Palavras-chave: Fish behaviour; Fishery ecology; Submarine Cyana; Dive; Underwater observation; Comportement des poissons et invertébrés; Ecologie halieutique; Submersible Cyana; Observation sous marine. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/1996/rapport-1554.pdf |
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| Lavialle, Gael; Morfin, Marie; Simon, Julien; Morandeau, Fabien; Vimard, Mathieu; Larnaud, Pascal. |
| In the context of the new European Common Fisheries Policy and in particular the Landing Obligation, the two Producers Organisations, COBRENORD and OPN launched the REJEMCELEC project in partnership with IFREMER and net suppliers. It was set in a complementary way to the CELSELEC project. The main goal is to reduce whiting, haddock and pelagic discards for single bottom trawlers fleets targeting whiting, squids, cuttlefish and monkfish within the Western Channel. A specific fleet targeting hake and John Dory in Celtic Sea during summer (around Scilly Island) was also studied in order to reduce discards of small haddock, hake and boarfish. After a state of the art, an analysis of quantitative data and various workshops organized in partnership between... |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00483/59493/62412.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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| 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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| 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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| 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... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00615/72695/71699.pdf |
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| Mehault, Sonia; Morandeau, Fabien; Kopp, Dorothee. |
| The new Common Fisheries Policy may exempt some species from the landing obligation if a high survival rate can be demonstrated among discards. This study focuses on the survival capacity of Nephrops norvegicus discarded from trawlers of the Bay of Biscay (France). Three sea trials were conducted on board 3 commercial trawlers and 15 fishing operations were sampled. The vitality of Nephrops was classed into three categories (healthy, moribund or dead) before release at sea and samples of healthy and moribund individuals were kept in captivity on Nephrops grounds for three days. A Generalised Linear Model was used to examine the variability in the proportion of healthy Nephrops discarded, which was significantly influenced by tow duration, duration of air... |
| Tipo: Text |
Palavras-chave: Vitality; Captivity; South western waters; Bottom trawl; GLM. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00346/45695/45355.pdf |
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| Mehault, Sonia; Morandeau, Fabien; Kopp, Dorothee. |
| Le taux de survie des langoustines rejetées après chalutage est estimé aujourd’hui à 51% contre 30% dans les années 70-80. Cette valeur estimée expérimentalement est donc un majorant du taux de survie réel qui est impacté par de nombreux facteurs difficilement quantifiables. La mortalité des rejets peut être réduite par l’utilisation de table de tri et de goulotte d’évacuation lors du traitement de la capture. Cependant, la survie des langoustines au-delà du moment de leur remise à l’eau est difficile à évaluer, mais il est certain que leurs chances de survie sont réduites si elles sont rejetées en dehors des secteurs où les individus pourront retrouver un habitat qui leur est favorable. |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00299/41018/40122.pdf |
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| Meillat, Marc; Dupouy, Herve; Bavouzet, Gerard; Kergoat, B.; Morandeau, Fabien; Gaudou, Olivier; Vacherot, Jean-philippe. |
| The fishery for benthic species (Monkfish, Megrim, Rays, etc ... ) represents for the surrounder countries of the Celtic Sea and the Bay of Biscaye one of the most important activities . An estimate of the discards of the main species resulting from the sorting practice onboard of the trawlers participating in this fishery was made in 1985 and 1991. it was concluded that an important quantity of juveniles of Rays, Megrim and Monkfish are discarded each year causing an important mortality. The aim of the present paper is to present the preliminary results of a selectivity grid fixed on a bottom trawl to limit as possible the discards. Three different grids were tested at sea during surveys with different results. The major problem is due to difference in... |
| Tipo: Text |
Palavras-chave: Chalut sélectif; Grille; Mer Celtique; Golfe de Gascogne; Baudroies; Sardines; Raies; Selectivity; Grid; Trawl; Celtic Sea; Bay of Biscaye; Monkfish; Megrim; Rays. |
| Ano: 1991 |
URL: https://archimer.ifremer.fr/doc/00394/50567/51258.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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| Registros recuperados: 35 | |
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