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| Registros recuperados: 10 | |
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| Charuau, Anatole; Biseau, Alain. |
| All the biological elements obtained in the two first phases of the study and the basical economical data are synthetized in a bio-economical model. From a typology of French fleets fishing in Celtic Sea, the carried out "métiers" (target-species + areas) are pointed out, which allows to define spatio-temporal "boxes". In each compartment, at a given time, the interactive components between fleets and stocks are known. The principle of the model consists to distribute, for each time interval, the fleets in each box. The allocation of fishing effort is assigned by two coefficients : "adherence" and "preference", expressing the abilities of fleets to seize the opportunities. Thus, it is possible to assess the consequences of usual management measures :... |
| Tipo: Text |
Palavras-chave: Bio economical model; Typology of fleets; Celtic sea; Modèle bio économique; Typologie des flottilles; Mer Celtique. |
| Ano: 1989 |
URL: https://archimer.ifremer.fr/doc/1989/rapport-1564.pdf |
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| Charuau, Anatole; Chesnier, Véronique; Conan, Gérard; Derennes, Marc; Destanque, Catherine; Guenole, Annie; Isifou, Amadou; Jezequel, Michèle; Miossec, Gilbert; Missaoui, Ichmi; Morizur, Yvon; Rivoalen, Jean-jacques. |
| Introduction : Since 1978, new measures to better manage lobster fisheries were implemented in the Celtic Sea within the context of Community regulations. Meshing, in particular, was set at 60mm, but many owners, in order to maintain sufficient leeway vis-à-vis the regulations and to avoid administrative hassles adopted at the outset fish meshing at 70mm, even 80mm. Certain habits aiming to compensate for the losses due to these increases were established: Adoption of better-performing trawls, increase in the secondary catch and enlargement of the fisheries. At the same time, especially because of strong demand from international bodies, OEM and especially EEC, knowledge about the lobster spread and more reliable assessments were achieved, the main problem... |
| Tipo: Text |
Palavras-chave: Stock assessment; Norway lobster; Celtic sea; Nephrops Norvegicus; Crustacea; Lobster fishery; Mer Celtique; Nephrops Norvegicus; Crustacea; Effort Peche; Sex Ratio; Capture; Relation Taille Poids; Maillage; Chalut; Gestion stock; Peche. |
| Ano: 1982 |
URL: http://archimer.ifremer.fr/doc/1982/rapport-2337.pdf |
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| Charuau, Anatole. |
| If Sea Bass fish farming (Dicentrarchus labrax L.) is currently experiencing an increase in Southern Europe, it is vital, in order to better reflect raising structures, to control its wastes. In order to do so, quantifying this species' wastes is essential to be able to present simple excretion ratios, easily useable by the farmer. Those ratios have been based on nitrogen, phosphorus and carbon masses established on intensive farming and 4 batches belonging to his stock (averaging 24, 5 to 362, 5 g). Each batch was followed up during the course of 1 month and fish farming in its entirety for 2 months. Mass assessments for nitrogen and phosphorus were level ((intrants = extrants) but never precise, contrary to what can be found in bibliography. The main... |
| Tipo: Text |
Palavras-chave: Fleet; Statistics; Celtic sea; Discard; Lobster fishery. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/rapport-1753.pdf |
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| Charuau, Anatole; Morizur, Yvon; Rivoalen, Jean-jacques. |
| Since 1978, the habits of the french fishermen working with bottom trawl in the Irish Sea and in the Celtic Sea were altered (CHARUAU et M0RIZUR, 198l) under the pressure of the new mesh regulation. Two facts are pointed out: - the shifting, stabilized during 1980 and 198l, of a part of the effort of the vessels fishing for gadoids, from the area VIIa to the areaVIIf - a tendancy inside the area VIIg of a part of the effort of the Nephrops trawlers to be transferred on benthic fishes when the yield of Nephrops is low. |
| Tipo: Text |
Palavras-chave: Celtic sea; Fishing fleets; Irish sea. |
| Ano: 1982 |
URL: http://archimer.ifremer.fr/doc/1982/acte-2342.pdf |
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| Calderwood, Julia; Robert, Marianne; Pawlowski, Lionel; Vermard, Youen; Radford, Zachary; Catchpole, Thomas L.; Reid, David G.. |
| As a result of the introduction of the Landing Obligation in European fisheries there is a need to equip industry with the tools and knowledge to avoid unwanted catches. Optimising fishing practices in terms of time and location fished have been acknowledged as being important in modulating catch composition. Mapping techniques used to identify and manage the spatio-temporal nature of bycatch, however, remain underutilized. Data collected on board commercial fishing vessels by observers provides an important source of information on the component of catches discarded. Using a unique dataset, combining observer data for Irish, French and British vessels operating in the Celtic Sea between 2010 and 2015, maps were developed to identify where catches of quota... |
| Tipo: Text |
Palavras-chave: Landing obligation; Discards; Consistent maps; Fishing tactics; Shiny app; Celtic sea. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00590/70162/68235.pdf |
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| Heathershaw, Ad; Codd, Jm. |
| Considerations of sediment mobility and unusual wavelength pattern changes in large sandwaves lying deep in the Celtic Sea, suggest that these features are probably formed as a result of internai wave perturbations on a tidally driven stream of sediment transport. In particular it is shown that while currents due to the surface tides alone are capable of transporting the sediments, it is necessary to invoke an internai wave mechanism to give the observed pattern of wavelength change across the sandwave field. Cartwright's (1959) internallee-wave model is found to give qualitative agreement with the observed decrease in sandwave wavelength with increasing distance from the shelf-break. |
| Tipo: Text |
Palavras-chave: Dunes; Ondes internes; Mer Celtique; Sandwaves; Internai waves; Celtic sea. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/00112/22286/19961.pdf |
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| Registros recuperados: 10 | |
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