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| Registros recuperados: 55 | |
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| Morizur, Yvon; Gaudou, Olivier; Demaneche, Sebastien. |
| During the years 2008 to 2013 several observations of catches were planned on board of set netters fishing in the bay of Biscay, in the English Channel, in the North sea and in the Mediterranean area (around Corsica). All the observations were done on nets without pingers and they were pooled to provide an average bycatch rate of marine mammals by fleet. Estimates of annual bycatch by using the fishing efforts of the year 2012 were provided by fleet. Harbour porpoise Phocoena phocoena was the most common bycatch in set nets. An average annual estimate of 600 harbour porpoises was obtained for the French fleet; other species recorded in set nets were mainly common dolphin Delphinus delphis, striped dolphin Stenella coeruleoalba and the two species of seals... |
| Tipo: Text |
Palavras-chave: France; Bycatch; Marine mammals; Phocoena phocoena; Set nets; Trammel nets; Gill nets; EU regulation 812/2004. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00209/32016/30451.pdf |
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| Fritsch, Manon; Morizur, Yvon; Lambert, E; Bonhomme, Francois; Guinand, B. |
| Sea bass (Dicentrarchus labrax) fisheries are becoming increasingly abundant along eastern Atlantic coastlines, especially in the ICES sub-areas IV, VII and VIII, but they are still not being managed by the European Union TAC (Total Allowed Catches) system. Scientific information about these sea bass stocks is limited, but the fishery is currently managed or modelled based upon these data, separated into the ICES divisions. Clearly, failure to manage satisfactorily the fishery may lead to a decline in stocks. We therefore investigated the structure of Atlantic sea bass populations at eight microsatellite loci in the Bay of Biscay and the English Channel and, additionally, at five selected loci in Ireland and Scotland. Genetic data showed no significant... |
| Tipo: Text |
Palavras-chave: Population structure; Microsatellite loci; Tagging; Mark recapture; Dicentrarchus labrax. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2401.pdf |
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| Morizur, Yvon; Ogor, Andre; Lespagnol, Patrick. |
| A patent was registered in 1991 for using bar codes to make up fish measuring board. Collection of data such as the length of the captured fish and sometimes their ages are required in order to manage fishery resources. It is a time-consuming operation as this work is usually carried out throughout the year for each species. The computerization of this phase has been the subject of much research work. Electronic fish measuring boards have been developed in Scotland, Canada, and Spain but they have not spread for a number of reasons. Going beyond these developments, IFREMER designed a more efficient and new open-ended fish measuring system - the ichthyometer - which features higher flexibility by using the bar code principle |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/1994/publication-2347.pdf |
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| Peronnet, Isabelle; Rochet, Marie-joelle; Badts, Vincent; Dimeet, Joel; Dintheer, Christian; Fauconnet, Laurence; Gaudou, Olivier; Larnicol, Alain; Morizur, Yvon; Tetard, Alain. |
| En 2010 des moyens importants ont continué d’être consacrés à l’observation à la mer tant par la Direction des Pêches Maritimes et de l’Aquaculture (DPMA) que par l’Ifremer, en particulier pour le développement de l’outil informatique pour ce dernier. Les points positifs pour cette année sont la refonte du plan d’échantillonnage et des documents contractuels qui définissent les marchés d’observation, dans une perspective de contrats pluri-annuels ; cet allongement des contrats est un pas vers la stabilisation des observateurs, à même de garantir à terme une meilleure implantation sur le terrain et une meilleure collaboration avec les professionnels ; la mise en place d’une véritable collaboration entre la DPMA, les prestataires d’observation, et l’Ifremer... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00032/14325/11606.pdf |
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| Dimeet, Joel; Rochet, Marie-joelle; Badts, Vincent; Dintheer, Christian; Dube, Benoit; Fauconnet, Laurence; Gaudou, Olivier; Messannot, Cecile; Morizur, Yvon; Tetard, Alain. |
| En 2011 le programme d’observation a continué à mobiliser des ressources substantielles, et à perfectionner ses outils et produits : évolution et suivi du plan d’échantillonnage, numérisation des bordereaux de terrain, analyse des refus d’embarquements par les professionnels, et édition d’un document de restitution des observations à l’intention des professionnels. L’équipe a également poursuivi ses efforts d’accompagnement du développement de la base de données halieutique et des logiciels qui l’environnent. Il est regrettable que ces efforts ne soient pas terminés et que de nouvelles difficultés viennent toujours compliquer et retarder la livraison d’une base de données enfin opérationnelle. Les progrès dans l’utilisation des données d’observation à la... |
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| Ano: 2012 |
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| Dunn, M. R.; Rogers, S. I.; Morizur, Yvon; Tetard, Alain; Aublet, B; Le Niliot, Ph; Miossec, Dominique. |
| The objective of this study was to develop an effective biological sampling programme for fish species in the English Channel (ICES Divisions Vild and Vile) which are not subject to quota management, and to prepare these data for use in multispecies, multi-fleet models being developed by the Channel Fisheries Study Group. Length and age data were coIlected for six non-quota species, and length data for a further five species. The samples were coIlected over a period of two years from important ports on the French and UK coasts. The exploitation patterns of each species were described by allocating catches from similar catching gears, regions, seasons and target species into common units referred to as métiers. The most important métiers in terms of landed... |
| Tipo: Text |
Palavras-chave: Biological sampling; Commercial species; Exploitation; Fishery management. |
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00304/41514/40722.pdf |
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| Morizur, Yvon; Tregenza, N; Heessen, H; Beerow, S; Pouvreau, Stephane. |
| Incidental mammal catch and the composition of the fish catch were studied in pelagic trawl fisheries in the North-East Atlantic. Several seasonal European fisheries were investigated with scientific observation on the fishing vessels. A total of 379 days at sea were observed . The sampled fisheries were horsemackerel (Dutch, French), herring (Irish), mackerel (UK), pilchard (UK , French) and other French fisheries (hake, tuna, bass, black bream, anchovy). Unintentional catches of dolphins were recorded in four of the investigated fisheries (Dutch horsemackerel, French tuna, French hake and French sea bass) at a rate of 1 dolphin per 100 tow hours; Grey seals were caught in the Irish herring fishery at a rate of 4 individuals per 100 tow hours. The fish... |
| Tipo: Text |
Palavras-chave: Albacore; Bluefin tuna Bass Black bream Whiting Hake Anchovy Pilchard Mackerel Horsemackerel Seal Cetacean Incidental mammal catch Reasons for discarding Discards By catch Pelagic trawl. |
| Ano: 1996 |
URL: https://archimer.ifremer.fr/doc/1996/rapport-1236.pdf |
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| Morizur, Yvon; Gaudou, Olivier; Miossec, Dominique; Leblond, Emilie; Toulhoat, Lucile; Gamblin, Caroline. |
| Up to now there has been no strong investigation on bycatch of marine mammals in the French set net fisheries of the English Channel (ICES areas VIIe,d &IVc) as the EC 812/2004 regulation does not oblige the state members to put observers on board of vessels in the ICES area VII. A study named FilManCet has been started end 2008-beginning 2009 to focus on the bycatch occurring on the set net vessels issued from Boulogne and Dunkerque ports (fisheries in VIId&IVc) and from the ports of North of Brittany. In this study which is conducted by the Fishing Industry, the data are made available to the scientists of Ifremer who has prepared also the sampling scheme for observation at sea. Two observers are employed full time in the North of France coasts... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00004/11524/8105.pdf |
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| Tetard, A; Boon, M; Bennett, D; Berthou, Patrick; Bossy, S; Casey, J; De Clerck, R; Delpech, Jean-paul; Dintheer, C; Giret, M; Large, P; Latrouite, Daniel; Lemoine, Michel; Millner, R; Morizur, Yvon; Ozanne, S; Palmer, D; Pawson, M; Pickett, G; Vince, M. |
| This work is the result of collaboration between the English, French, Channel Isles and Belgian laboratories which are involved in a study of the English Channel. Its subject is the activities of fleets and fleet interactions, and it complements other work on the biogeographical identification of Channel fish and shellfish stocks (published), and on modelling the fleets' interactions as they exploit the resources (in preparation). The concept of a métier is defined as being the use of one fishing gear to catch one or several species targeted during a particular season in a given area. On this basis, 74 métiers were identified during 1989-90. For each métier we give a brief description of the catching gear, the target species and most usual by-catch, the... |
| Tipo: Text |
Palavras-chave: Fisheries management; Fishing effort; Technical interactions; English Channel; Métier; Gestion des pêcheries; Distribution de l'effort de pêche; Interactions techniques; Manche; Métiers. |
| Ano: 1993 |
URL: http://archimer.ifremer.fr/doc/1993/rapport-704.pdf |
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| Le Guen, J.c; Morizur, Yvon. |
| Length measurements on Pseudotolithus elongatus ' samples from the Congo were recorded in the 60s. Subsamples were collected in order to be "aged" by otoliths' reading. The size frequency distributions were splitted into successive unimodal distributions by different methods. Their results were compared. The results obtained from the "successive maximums' method" were similar to those from the "otoliths' reading." The programs NORMSEP and MIX gave results far more difficult to interpret biologically speaking in spite of their mathematical quality. Because many length frequency distributions of a cohort are symmetrical in nature, we suggest applying the "successive maximums' method"if there is no evidence of normality |
| Tipo: Text |
Palavras-chave: Frequency analysis; Size distribution; Pseudotolithus elongatus; Sciaenidae; Pisces. |
| Ano: 1989 |
URL: http://archimer.ifremer.fr/doc/1989/rapport-2336.pdf |
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| Morizur, Yvon; Antoine, Loic. |
| The exploitation of the living marine resources should take into account the effects on marine ecosystems. It consequently includes direct and indirect impacts of fishing activities on marine communities of non-market value for the fishing industry. Protecting the marine species victims of by-catch such as sea mammals is essential as it could be a serious threat for endangered species -See COM (1999) 363 final. The entire group of cetaceans are among the protected species listed by CITES against over-exploitation through international trade. Similarly, several international agreements on cetaceans conservation have been signed, including the Agreement on the Conservation of Small Cetaceans of the Baltic and North Seas (ASCOBANS), the ACCOBAMS agreement for... |
| Tipo: Text |
Palavras-chave: Catche; Cetacean; Marine ecosystem; Fishing; Mammal; Marine living resources. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-1552.pdf |
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| Registros recuperados: 55 | |
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