Consulta: subjectFacets:"Gestion de stocks"
Registros recuperados: 4
Data/hora: 06/06/2024 09:42:49

Les pêcheries de buccin (Buccinum undatum L. : Gastropoda) du Golfe Normand-Breton. Eléments de gestion de la ressource
Provedor de dados: 5
Autores: Santarelli Chaurand, Leonardo.
The whelk (Buccinum undatum) fisheries in the gulf between Brittany and Normandy have grown quickly over the past ten years. In 1983, 35 potters and 14 dories from Granville harbour and the Blainville maritime station landed 3,900 tonnes of whelk (for a value of 7.5 million francs). In spite of a sharp drop in profitability, the number of fishers is still growing. This study aimed to provide decision-making elements for rational management of the resource : stock abundance, catches per unit effort, mortality due to fishing effort and biological properties.   In order to assess the impact of measures to organise the fishing effort on total catches in balance, two predictive models were used: Pella and Tomlinson's generalised production model and Ricker's...
Tipo: Text
Palavras-chave: Bio economic modelling; Sampling; Population dynamics; Stock management; Mollusc; Modélisation bioéconomique; Echantillonnage; Dynamique de populations; Gestion de stocks; Mollusque.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/these-1203.pdf

Traits biologiques et exploitation du bar commun Dicentrarchus labrax (L.) dans les pêcheries françaises de la Manche et du golfe de Gascogne.
Provedor de dados: 5
Autores: Fritsch, Manon.
Sea bass Dicentrarchus labrax (Linné, 1758) is a fish of major interest in France and in the British Isles. It is the main target species for some anglers and a growing number of professional fishermen. In spite of this, the reproduction of sea bass in natural environment, the identification of its populations, as well as the fleet participating to and the level of its exploitation are poorly known. Thus, in the perspective of a future management of the bass fisheries, this thesis collected required data for the analysis of the sea bass resource in the English Channel and the Bay of Biscay. A first chapter describes to the principal biological and ecological characteristics of Dicentrarchus labrax. The five following chapters deal successively with: (i)...
Tipo: Text
Palavras-chave: Fisheries management; Fisheries exploitation; Angling; Tagging; Microsatellite loci; Reproduction; Dicentrarchus labrax; Gestion de stocks; Exploitation; Pêche récréative; Pêcheries; Marquage; Marqueurs microsatellites; Reproduction; Dicentrarchus labrax.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/these-1088.pdf

Méthode d'estimation de la surface de pêche d'un casier à l'aide d'une filière expérimentale
Provedor de dados: 5
Autores: Gros, Philippe; Santarelli, Leonardo.
The experimental design of the capture field area of baited whelk-pots involves, as a controlled factor, four different spacings between pots (6, 12, 24 and 36m), randomly distributed along a ground line. This spectrum of values is sufficiently broad to preclude overlap of capturing fields of sorne pots. Taking account of the patterns of the M2 tidal currents in the area studied, an ellipse was chosen as a geometrical model of the shape of the capture field. Semimajor and semiminor axes were estimated by least squares, the expected catch per pot being defined as a decreasing function of the area of overlap with adjacent capture fields. ·  Experimental fishing of Buccinum undatum L. was carried out in the Channel Isles region (Western Channel), and provided...
Tipo: Text
Palavras-chave: Échantillonnage quantitatif; Estimation de densité; Casier appâté; Gestion de stocks; Buccin; Quantitative sampling; Density estimate; Baited pot; Stock assessment; Whelk.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/00112/22279/19954.pdf

Programme de repeuplement - "Sea Rancing" en Salmonidés migrateurs - Production de juvéniles saison 80-81
Provedor de dados: 5
Autores: Gaignon, Jean-louis; Prouzet, Patrick.
Ce document a pour but de fournir l' ensemble des résultats et des observations recueillis au cours d 'une saison dans le cadre de programmes CNEXO . En effet, si certaines données sont obtenues grâce à des expériences originales et dans ce cas font ou feront l'objet de publications, d'autres constituent de simples notes ou essais qui peuvent représenter globalement une expérience susceptible de pouvoir aider à l'amélioration de techniques de production nécessaires au développement de l'activité Aquaculture - Repeuplement. Il a en outre la particularité de fournir des données sur des sujets dont l 'homogénéité n'apparaît peut - être pas évidente au lecteur élevage intensif de juvéniles. repeuplement, "Sea Ranching", gestion des stocks. Pourtant il n' y a...
Tipo: Text
Palavras-chave: Aquaculture; Salmo salar; Saumon atlantique; Production; Juvénile; Repeuplement; Gestion de stocks.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/00078/18902/16488.pdf