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| Registros recuperados: 10 | |
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| Biseau, Alain; Mahevas, Stephanie; Perodou, Jean-bernard; Berthou, Patrick. |
| Three fleets of the French fishery are investigated : the dredge fleet of the Western part of the Channel, the bottom-trawl fishery of South-Britanny harbours, and the Mediterranean trawl fishery. Landing and effort data by species, vessel and trip lead to yields (catch per unit of effort) which are analysed by a multicplicative model with two or three factors. Individual fishing powers are then quantified for some given years, together with variation in relative abundance of the stock within area and/or period strata. Attempts to explain these fishing powers by vessels characteristics are made. After the study of the Mediterranean trawl-fleet, which takes Year into account in the model, two multi-annual series are analysed, and some conclusions on fishing... |
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| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00327/43785/43343.pdf |
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| Laurec, Alain; Charuau, Anatole; Perodou, Jean-bernard; Nedelec, Daniel; Biseau, Alain; Durand, Jean-louis; Rivoalen, Jean-jacques; Dupouy, Herve; Le Louarn, G.; Leroux, L.. |
| The general study, scheduled from 1984 to 1986, aims at providing a judgement about the fisheries in the Celtic Sea. This area has been chosen because it is frequented by EEC vessels with, for the time being, a large majority of French vessels. Activities there are easier to monitor than anywhere else as coastal fisheries are little developed in the area. The final product will consist of a certain number of hypotheses about the planning strategies that could be implemented in the Celtic Sea. The main idea is, firstly, to conduct analytical studies, stock by stock, in order then, to synthesize them into a model integrating the interactions between fleets in relation to their target species. A bio-economical model, deriving from the latter, will enable the... |
| Tipo: Text |
Palavras-chave: Monk; Cuckoo ray; Blue whiting; Cod; Hake; Ling; Common dab; Data bases; Fishing statistics; French fisheries; Demersal fish; Nephrops; Celtic Sea; Baudroies; Raie fleurie; Julienne; Cardine; Morue; Merlu; Merlan; Base de données; Rejets; Statistiques de pêche; Pêcheries françaises; Poissons demersaux; Langoustine; Mer Celtique. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/rapport-3671.pdf |
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| Grizel, Henri; Langlade, Aime; Perodou, Jean-bernard. |
| Some observations on spat collection, carried out in 1976 and 1977, lead us to use mussel shells in suspension. In 1978, while bottom collection, in deep water farms, had been very bad, large quantities of spat were collected using our method. The sectors used, the percentage of collecting mussel shells and the amount of spat par shell are indicated in this note. |
| Tipo: Text |
Palavras-chave: Naissain; Captage; Ostrea edulis; Huître plate. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/1979/acte-6288.PDF |
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| Laurec, A.; Perodou, Jean-bernard. |
| multiplicative models, applied to the estimation of fishing powers lead after logarithmic transformations to linear systems, the dimension of which can be large. It is however possible to decrease the dimensions of the matrices corresponding to the linear systems created (Morrison, 1976) through a substitution technique. This technique is applied to the classical methods due to Robson (1966) Laurec et Fonteneau, 1979) Gavaris, (1980). The estimation of the variancecovariance of the output is discussed, the duali ty between techniques calculating such quantities, and simpler ones providing just a best fit solution. The practical influence of the correction factor (Laurent, 1963) discussed in a first appendix. A second appendix is devoted to a situation... |
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| Ano: 1987 |
URL: http://archimer.ifremer.fr/doc/00394/50569/51260.pdf |
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| Perodou, Jean-bernard; Nedelec, Daniel. |
| La dorade grise (fig. 1) est traditionnellement exploitée dans les eaux littorales par les petits métiers (ligne, palangre, pêcheries fixes) et n'avait jamais été capturée en quantité substantielle jusqu'en 1975-76. Depuis lors, avec le développement du chalutage pélagique, elle occupe une place importante dans les pèches artisanales françaises. Au plan national elle se range en vingtième position dans le classement du chiffre d'affaires des espèces pêchées en 1979. La capture annuelle se situe aux environs de 5 500 tonnes. |
| Tipo: Text |
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| Ano: 1980 |
URL: https://archimer.ifremer.fr/doc/1980/publication-7173.pdf |
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| Registros recuperados: 10 | |
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