Consulta: creatorFacets:"Morandeau, Fabien"
Registros recuperados: 35
Data/hora: 02/06/2024 07:29:09

Etude et mise au point d'un chalut muni d'une grille sélective à langoustine (Campagne selmerl 2, juin 2002 )
Provedor de dados: 5
Autores: Morandeau, Fabien; Meillat, Marc.
Poursuite des  essais de mise au point d'une grille sélective à langoustine des mois avril  et mai 2002. Des chaluts jumeaux sont utilisés afin de comparer le dispositif à tester. La zone couverte concerne la pêcherie langoustine et merlu dans le sud ouest des îles Glénan et l'ouest de l'île de Groix. La période  est le mois de juin, époque favorable pour les espèces mentionnées ci-dessus. Deux nouvelles grilles bizeautées ont été réalisée par le laboratoire matériaux et structure  du centre IFREMER  de Brest . Les premiers résultats sont négatifs en ce qui concerne le «tri» de la langoustine effectué par la petite grille souple bizeautée .
Tipo: Text
Palavras-chave: Breizline; Codend; Nephrops grid; Grid; Selectivity; Fishing; Chaussettes; Polyéthylène; Breizline; Cul de chalut; Grille à langoustines; Grille; Sélectivité; Pêche.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/rapport-6758.pdf

Preliminary results of a trawl fitted with a selective grid for the fishery of benthic species from Celtic Sea and Bay of Biscay
Provedor de dados: 5
Autores: 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

Compléments à la réponse à la saisine 2008-1014 sur les pressions potentielles des engins de pêche sur les habitats et espèces listés dans les Directives Habitats (92/43/EEC) et Oiseaux (2009/147/CE), pour les sennes danoises et écossaises ainsi qu’envers les récifs côtiers et les récifs circalittoraux.
Provedor de dados: 5
Autores: 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
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41147/41077.pdf

LOUPE- Observation de l'habitat et des communautés associées dans le contexte des pêcheries du Gouf de Capbreton
Provedor de dados: 5
Autores: 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
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00154/26568/24699.pdf

Saisine concernant l'effort de pêche des navires espagnols dans les eaux sous souveraineté ou juridiction française du golfe du Lion et l'atteinte du rendement maximum durable sur le merlu et le rouget
Provedor de dados: 5
Autores: 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
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00255/36590/35150.pdf

What can be expected of a T90 extension piece to improve selectivity in bottom trawl multispecific fisheries in the Bay of Biscay?
Provedor de dados: 5
Autores: 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

OBSERVHAL96, campagne d'observations à finalité halieutique
Provedor de dados: 5
Autores: 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

Analyse des informations disponibles sur le dispositif « Raised Fishing Line »
Provedor de dados: 5
Autores: 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
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00615/72695/71699.pdf

Reducing discards of demersal species using a 100 mm square mesh cylinder: Size selectivity and catch comparison analysis
Provedor de dados: 5
Autores: 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
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00600/71236/73595.pdf

Etude préliminaire pour la mise au point et le développement d'un chalut muni d'une grille sélective à langoustine
Provedor de dados: 5
Autores: 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

Essais de casiers à langoustines dans la fosse de Capbreton
Provedor de dados: 5
Autores: 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
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-3470.pdf

HYDROTAMIS. Evaluation et amélioration de la qualité des captures de civelles de l’UGA Loire, côtiers vendéens et Sèvre niortaise
Provedor de dados: 5
Autores: Pengrech, Alexis; Morandeau, Fabien; Vincent, Benoit.
La qualité des captures de civelles occupe une importance croissante pour optimiser les projets de repeuplement en France et en Europe et pour mieux valoriser la production. Aussi le Comité régional des pêches maritimes et des élevages marins des Pays de la Loire (COREPEM) a initié une étude visant à améliorer la qualité des captures de civelles de l’UGA LCV, première unité de gestion nationale en nombre de licenciés et en volume de production. Pour réaliser cette étude, le COREPEM s’est appuyé sur l’Ifremer (Laboratoire de Technologie Halieutique de Lorient), le Syndicat mixte pour le développement de la pêche et de l’aquaculture en Pays de la Loire (SMIDAP) et l’Association des pêcheurs professionnels de Loire-Atlantique (AADPPMFEDLA). Ce projet se...
Tipo: Text
Palavras-chave: Civelle; UGA LCV; Région Pays de la Loire; Estuaires; Pêcheurs professionnels; Amélioration de la qualité des captures; Tamis à civelles; Hydrodynamisme.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00292/40296/38734.pdf

Expertise et étude bibliographique des dispositifs ou mesures techniques permettant de diminuer les captures de cabillaud des chalutiers ciblant les espèces démersales en mer Celtique
Provedor de dados: 5
Autores: Mehault, Sonia; Morandeau, Fabien; Goascoz, Nicolas; Larnaud, Pascal; Biseau, Alain.
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72582/71556.pdf

A methodological framework for characterizing fish swimming and escapement behaviors in trawls
Provedor de dados: 5
Autores: 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
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00663/77553/79457.pdf

Essais de dispositifs sélectifs par les flottilles chalutières du golfe de Gascogne. Programme REDRESSE
Provedor de dados: 5
Autores: 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

Survie des rejets de langoustine après chalutage.
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00299/41018/40122.pdf

Lorient Flume tank
Provedor de dados: 5
Autores: 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
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00436/54803/56299.pdf

Projet CELSELEC. Amélioration de la sélectivité des chalutiers hauturiers en mer Celtique
Provedor de dados: 5
Autores: 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

Compte-rendu de la campagne de pêche expérimentale de l'espadon à la palangre dans la région de l'Atlantique nord par les navires de l'Ile d'Yeu "De Coubertin" et "La Gabrielle"
Provedor de dados: 5
Autores: George, Jean-paul; Morandeau, Fabien.
Cette campagne de pêche expérimentale a permis de tester la palangre pélagique en vue d'une possible diversification de la flottille artisanale de la côte atlantique.
Tipo: Text
Palavras-chave: Technologie pêche; Palangre; Espadon.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00071/18266/15829.pdf

Toward elimination of unwanted catches using a 100 mm T90 extension and codend in demersal mixed fisheries
Provedor de dados: 5
Autores: Robert, Marianne; Morandeau, Fabien; Scavinner, Marion; Fiche, Marion; Patterson, Heather M.
Most European fishing fleets will need to drastically reduce their unwanted catches to comply with new rules of the common fisheries policy. A more practical way to avoid increasing on-board sorting time and issues linked to storage capacity is to prevent unwanted catches in the first place. We assessed the selectivity properties of an experimental fishing gear that combined a 100 mm T90 cylinder with 130 meshes in the extension and a 100 mm T90 codend of 33 meshes (experimental gear) compared to a 100 mm diamond mesh extension and codend (control gear) during commercial trips using twin trawls. Analysis of the relative size composition of catches indicated a significantly higher escapement of small fish of several target species (e.g. Lepidorhombus...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75312/75804.pdf

Survival of discarded Nephrops norvegicus after trawling in the Bay of Biscay
Provedor de dados: 5
Autores: 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

Rapport d’étude final du projet REJEMCELEC - Réduction des Rejets en Manche et mer Celtique par la Sélectivité des engins de pêche
Provedor de dados: 5
Autores: 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
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00483/59493/62412.pdf

The low impact of fish traps on the seabed makes it an eco-friendly fishing technique
Provedor de dados: 5
Autores: 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
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75526/76409.pdf

Evaluation de l’impact du chalut à maquereau sur la sole commune et son renouvellement dans les zones de nourricerie
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00255/36628/79501.pdf

Using a trait-based approach to understand the efficiency of a selective device in a multispecific fishery
Provedor de dados: 5
Autores: Mouchet, Maud; Poirson, Manon; Morandeau, Fabien; Vogel, Camille; Méhault, Sonia; Kopp, Dorothee.
Improving the selectivity of a fishing gear is one technical management measure to significantly reduce by-catch of non-commercial species or undersized individuals. The efficiency of selective device is mainly estimated by comparing species composition, the biomass and length spectrum of caught individuals and escapees while the functional traits of species are rarely accounted for. Using an innovative technical device to reduce catches of undersized individuals in a multispecific bottom trawl fishery in the Bay of Biscay, namely a T90 mesh cylinder, we measured functional traits on both caught and escaped individuals of 18 species. Using a Principal Component Analysis and K-means partitioning, we clustered species into 6 groups illustrating 6 different...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62330/66588.pdf

Using acoustic telemetry to estimate post-release survival of undulate ray Raja undulata (Rajidae) in northeast Altantic
Provedor de dados: 5
Autores: Morfin, Marie; Simon, Julien; Morandeau, Fabien; Baulier, Loic; Méhault, Sonia; Kopp, Dorothee.
The landing obligation introduced in the reform of the European Union Common Fisheries Policy requires landing all catches of species under quota. However, exemptions may be granted for species for which “scientific evidence demonstrates high survival rates”. Captivity experiments are often used to determine fish survival rates, but they are difficult to perform for large species such as rays due to the limited storage capacity of tanks. Thus, little information is available on ray survival after release despite an identified potential for high survival. We used acoustic telemetry to study rays discarded from a coastal bottom trawl fishery in their natural environment and present a new ad hoc approach to derive a minimum survival rate. After capture under...
Tipo: Text
Palavras-chave: Tagging; Discard survival; Trawl fishery; Elasmobranchs; Bay of Biscay.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00503/61432/65312.pdf

Survivability of discarded Norway lobster in the bottom trawl fishery of the Bay of Biscay
Provedor de dados: 5
Autores: Merillet, Laurene; Mehault, Sonia; Rimaud, Thomas; Piton, Corentine; Morandeau, Fabien; Morfin, Marie; Kopp, Dorothee.
In the context of the landing obligation set by the new Common Fisheries Policy (CFP), Norway lobster Nephrops norvegicus was identified as a species likely to have high survival rate when discarded in the bottom trawl fishery of the Bay of Biscay. Previous studies in this area reported a survival rate between 30% and 51%, but the experiments were done on a limited monitoring period and the seasonal variations were not investigated. This study was designed to obtain a reliable value for survival rate after a 14-day monitoring period in onshore tanks allowing considering delayed mortality. The study also tested the effect on the survival rate of using a discarding chute system, a sorting device that was made mandatory on the 1st of January 2017 for Nephrops...
Tipo: Text
Palavras-chave: Nephrops norvegicus; Sorting process; Captivity; Vitality; Season; Discard survival.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00407/51864/52608.pdf

Informations sur les améliorations de la sélectivité des espèces/engins visés par les exemptions de minimis
Provedor de dados: 5
Autores: Larnaud, Pascal; Mehault, Sonia; Morandeau, Fabien.
Ce travail vise à évaluer les possibilités d’amélioration de la sélectivité pour les espèces / engins /zones visées par les exemptions de minimis (annexe 1), en fonction des données bibliographiques ou de résultats d’études.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61730/65708.pdf

Improving gear selectivity of whiting ( Merlangius merlangus ) on board French demersal trawlers in the English Channel and North Sea
Provedor de dados: 5
Autores: 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 (&lt;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

Engineering development of flexible selectivity grids for Nephrops
Provedor de dados: 5
Autores: 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

Observations ichtyologiques effectuées en 1990
Provedor de dados: 5
Autores: Quero, Jean-claude; Du Buit, M.h.; Kergoat, Bernard; Laborde, Jean-louis; Morandeau, Fabien.
The authors give data on the catches during 1990 of some rare fishes to the French harbours: Chlamydoselachus anguineus, Oxynotus paradoxus, Sarda sarda, Katsuwonus pelamis, Centrolophus niger; Cubiceps gracilis et Stromateus fiatola. They give also data on Ihe catches with a bottom trawl of 3 Xiphias gladius. Some data on Mediterranean observations by helicopter on the behaviour of Cethrinus maximus are given. NOT CONTROLLED OCR
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-3681.pdf

Validation du TED et essais d'une nouvelle grille sélective dans la pêcherie crevettière de Guyane2007
Provedor de dados: 5
Autores: Meillat, Marc; Morandeau, Fabien; Achoun, Joseph; Barthelemy, Patricia.
This work is in line with the fishing technology section of the DUHAL (Durability of Halieutic activities) action. It aims to reduce the "side" catches associated with shrimp fishing in French Guyana. Shrimp trawling is indeed considered as one of the fishing activities which generates the most waste. The campaign carried out in November/December 2006 had lead to the following conclusions [...]
Tipo: Text
Palavras-chave: Bycatch Reducing Device; Radial Escape Section; Duhal; Survey campaign; Shrimp; Selectivity; Grille Nordmore; Mailles carrées; BRD; RES; TED; Duhal; Grille; Campagne à la mer; Crevette; Sélectivité.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-6683.pdf

Evaluation du taux de survie des captures indésirées de langoustines "Nephrops norvegicus" pêchées au chalut de fond dans le golfe de Gascocgne
Provedor de dados: 5
Autores: 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
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00378/48953/49357.pdf

Campagne SELECT 13 N/O Gwen-Drez - Du 10 au 28 avril 1997
Provedor de dados: 5
Autores: 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

Amélioration de la sélectivité des chalutiers Pêcherie multispécifique – Manche - Mer du Nord (selecmer)
Provedor de dados: 5
Autores: 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