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| Registros recuperados: 55 | |
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| Dube, Benoit; Dimeet, Joel; Rochet, Marie-joelle; Tetard, Alain; Gaudou, Olivier; Messannot, Cecile; Fauconnet, Laurence; Morizur, Yvon; Biseau, Alain; Salaun, Michele. |
| Ce document est une synthèse des informations collectées en 2011 à bord des navires de pêche professionnelle dans le cadre de l'action ObsMer. Cette action vise à observer in situ l'activité de pêche et l'ensemble de la capture, particulièrement la partie non retenue, en identifiant les espèces capturées, les tonnages par espèce et en prenant des mesures de tailles. |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00109/21976/19586.pdf |
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| Morizur, Yvon; Le Gall, Yves; Van Canneyt, O; Gamblin, C. |
| An acoustic repellent was developed by Ixtrawl and Ifremer to mitigate incidental catches of common dolphins in trawl fisheries. The system developed-which bears the name of CETASAVER-was developed after behavioural tests performed on groups of common dolphins. These tests conducted at sea for the European project Necessity showed that the trajectories of animals could be changed by this pinger. The CETASAVER emits a beam directing conical with an opening between 75 and 15 degrees. This allows directional less disturbing environmental noise and must be directed towards the opening of the trawl and the frequency ranges from 30 to 150 kHz. The signals are modulated and pulsed. The average sound level is 178 dB which gives 139 dB at the entrance to the trawl... |
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| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/rapport-4506.pdf |
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| Le Goff, Ronan; Morizur, Yvon; Levrel, Harold; Biseau, Alain; Veron, Gerard; Drogou, Mickael; Laurans, Martial; Merrien, Claude; Morandeau, Gilles; Caill-milly, Nathalie. |
| Cette note, après une présentation de l’état des connaissances relatives aux activités de pêche maritime de loisir en France (activités et ressources), passe en revue un certain nombre de mesures d’encadrement envisageables pour une pêche de loisir éco-responsables. |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00111/22177/19833.pdf |
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| Morizur, Yvon; Demaneche, Sebastien; Dube, Benoit; Gaudou, Olivier; Dimeet, Joel. |
| The European Regulation 812/2004 aims to assess the incidental catches of cetaceans in fisheries and to limit as much as possible the bycatch. The program Obsmer manages for France all the observations at sea required by various fishery regulations. This program is implemented by the ministry of agriculture and fisheries (Direction des Pêches Maritimes et de l’Aquaculture) and IFREMER. For the European Regulation 812/2004, the effort dedicated to observation on board of vessels during the year 2011 represents 287 days of sea area for static gears in ICES area VIII, and also 299 days at sea for towed gears in ICES areas VII & VIII and also in the Mediterranean area. In addition some 308 days at sea were dedicated to set nets in areas concerned with... |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00114/22559/20247.pdf |
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| Priour, Daniel; Billar, Jean-yves; Morizur, Yvon; Gomez, Julio. |
| The objective of the project is firstly, to assess the fuel consumption for the fishing technique of Danish seine including assessing its distribution in each phase of its implementation and secondly, investigate potential improvements in energy consumption. Sensors on the boat and on the gear have been installed. Measurements were carried out during sea trials. The boat and gear were simulated. From these measurements and simulations, we observe that the route and fishing phase have more or less te same consumption (58% and 42%). During fishing phase, the gear focuses the main share of consumption (60%). This energy is transmitted to 2/3 by winches and 1/3 by the propulsion. Areas for improvement were evaluated: Changing the type of winch (electric vs... |
| Tipo: Text |
Palavras-chave: Efficacité énergétique; Senne danoise; Pêche; Energy efficiency; Danish seine; Fishing. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00243/35383/33897.pdf |
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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. |
| The average length at which female Nephrops norvegicus attain their first maturity was determined during 1977 and 1978 by following the presence of spermatophores and development of the ovaries. During 1978, females were sexually mature at the age of 2 but in 1977 they did not mature before the age of 3. The cumulative maturity curves are sigmoid, due to an overlapping of Gaussian curves. A logistic equation was developed to calculate the percentage of mature females at each length. There is no evidence that the present fishing levels reduce the chances of a female with developing ovaries to be fertilized, since 90 to 100% of such females bear spermatophores. |
| Tipo: Text |
Palavras-chave: Brittany; France; ANE; Crustacea; Nephrops norvegicus; Females; Growth; Sexual maturity. |
| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/1983/publication-2349.pdf |
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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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| 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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| Registros recuperados: 55 | |
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