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Registros recuperados: 3
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Compte-rendu de la campagne OBSERVHAL98 - Observations à finalité halieutique ArchiMer
Latrouite, Daniel.
The scientific cruise Observhal98 took place in Biscay Bay, May 14 to June 6, 1998, with the submersible Nautile operated from the research vessel Nadir. The goal was to make direct underwater observations on fishes and invertebrates of commercial interest, on the environment in which they live and on the impact of fishing gears. A total of 22 dives, 2 to 5 hours long have been operated, ten by depth 1800 to 1000 m, three by 500 to 200 m, seven by 80 to 200 m and two in the water column. An in situ technic have been developped and operated from the submarine, with the aim of studying the growth scheme of deep water fishes. Specimen of Hoplostethus atlanticus and Trachyscorpia cristualata have been caught, anesthetised, injected with vital coloring and...
Tipo: Text Palavras-chave: Halieutique; Nautile; Plongée; Sous marin; Expérimentation; Observation; Fisheries; Nautile; Dive; Submarine; Experimentation; Observation.
Ano: 1999 URL: https://archimer.ifremer.fr/doc/1999/rapport-920.pdf
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Estimation d'un stock naturel de coquille Saint Jacques par une méthode combinant les dragages et la plongée. Traitement des résultats par une méthode géostatistique ArchiMer
Buestel, Dominique; Dao, Jean-claude; Gohin, Francis.
The efficiency of the fishing drags in the Saint Brieuc Bay, Brittany, has been determined through the analysis of the tracks left on the seabed. The results, which focus mostly on the age class n°2 (2.5 years), show that the efficiency and the damages caused by the drags vary heavily according to the nature of the seabed. For soft bottoms, the average efficiency is 67 % and the global damage is 2 %. Concerning hard bottoms, the values are respectively 30 % and 17 %. These efficiency results combined with those of a dragging expedition in a set sector of the Saint-Brieuc Bay enable a direct assessment of the abundance. A result treatment method deriving from the geostatistical theory is used: it takes into account the spatial structure of the king scallop...
Tipo: Text Palavras-chave: Coquille Saint Jacques; Plongée; Dragage; Pecten maximus L.; Estimation stocks.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-6536.pdf
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Prospection en plongée du gisement d'oursins du Golfe du Morbihan (2003 – 2006) ArchiMer
Dimeet, Joel.
Une évaluation du gisement d'oursins du golfe du Morbihan a été effectuée tous les ans pendant la période 2003 - 2006 avec le même protocole. Trois plongeurs sur quatre ont participé à toutes les plongées. Ceci nous permet de comparer les résultats d'une année sur l'autre même si les positionnements sur chaque zone ne sont pas parfaitement les mêmes et que les conditions météo (visibilité et courant) sont rarement similaires. Depuis 2003 on peut remarquer une progression constante des captures totales sur l'ensemble des stations, aussi bien pour les non commerciaux (<55 mm) que pour les commerciaux. En 2003, la récolte représentait 19 % de la totalité des oursins (avec autant de commerciaux que de non commerciaux) tandis qu'elle représentait près de 31...
Tipo: Text Palavras-chave: Brannec; Kerners; Hen tenn; Roc'h vihan; Port Blanc; Stibiden; Density; Size; Sampling; Survey; Gulf of Morbihan; Layer; Urchin; Brannec; Kerners; Hent tenn; Roc'h vihan; Port Blanc; Stibiden; Densité; Taille; Échantillonnage; Plongée; Golfe du Morbihan; Gisement; Oursin.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-6773.pdf
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