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| Registros recuperados: 61 | |
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| Pitel, Mathilde; Fifas, Spyros; Huet, Jerome; Berthou, Patrick. |
| During the 1950s, the clam played only a bit part in the local maritime context. It was the focus of a different fleet than the king scallop fleet, with a lesser fishing capacity (fleet from the Relecq Kerhuon) and an average annual catch of around 150 tonnes. In the 1960s, with a drop in the king scallop stock, the clam became a substitution resource with productions of over 400 tonnes. The first stages of this evolution are detailed by Le Gall (1969) and Piboubès (1973). Slowly, the fleet developed (from the 70s on, with the progressive arrival of seaweed boats in the fishery) The drop of the production until the disruption of the fishery in the 1980s is the combined consequence of the increase of the fishing capacities with an unfavourable populating... |
| Tipo: Text |
Palavras-chave: Venus verrucosa; Stock assessment; Clams; Bay of Brest; Brittany; Venus verrucosa; Évaluation de stock; Praires; Rade de Brest; Bretagne. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/rapport-4607.pdf |
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| Pitel, Mathilde; Savina, Marie; Fifas, Spyros; Berthou, Patrick. |
| The exploited stocks of wild bivalves (common cockles, dog cockles, clams, and spisules) in the Norman-Breton gulf vary according to the fishing activity and the environmental conditions. Different studies, carried out by the Ifremer in this region (between 1982 and 1998), enabled the evaluation of the stocks available for fishing as well as the collection of data on these species (demographic structure, growth...). For more information on the 1993-1994 studies and a presentation of the site and the fishery please refer to the reports by Berthou, 1987 and Noël et al, 1995. The bivalve expedition conducted in May 2002, enabled us to update the data on the populations of dog cockles and banded carpet shells, then of spisules and clams, using the same... |
| Tipo: Text |
Palavras-chave: Bittersweet palourdi; Spisula; Clam; Brittany norman gulf; Bibalves; Brittany; Fishing; Crepidule; Amande de mer; Spisule; Praire; Palourde; Golfe normand breton; Bivalves; Bretagne; Pêche. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/rapport-4609.pdf |
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| Tige, Gilbert; Morel, Marc. |
| Depuis plusieurs années, l'huître plate O. edulis, cultivée en France est atteinte d'une maladie de la glande digestive. Jusqu'à la fin de l'été 1973, les élevages de l'Aber Benoît, de l'Aber Wrach et de la Penzé étaient les seuls qui, en Bretagne, fussent parasités (Grizel et Tigé, 1973). Depuis, la situation a très nettement évolué. A la fin de l'année 1973, l'épizootie a gagné les secteurs ostréicoles de Morlaix et d'une partie de la rade de Brest ; elle s'est étendue d'avril à juin 1974 à la quasi totalité des autres centres d'élevage. Nous rapporterons ici les observations faites depuis 1973. |
| Tipo: Text |
Palavras-chave: Pathologie; Huître plate; Ostrea edulis; Glande digestive; Bretagne. |
| Ano: 1974 |
URL: http://archimer.ifremer.fr/doc/00015/12628/9516.pdf |
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| Lunven, Michel; Guillaud, Jean-francois; Crassous, Marie Pierre; Youenou, Agnes; Gohin, Francis; Huret, Martin; Danielou, Marie-madeleine; Kerouel, Roger; Labry, Claire; Aminot, Alain. |
| Inscrite dans le cadre du Grand Défi Golfe de Gascogne, la campagne VILOIR a été réalisée du 19 au 26 Juin 2003 à bord du Côtes de la Manche avec pour objectif l’étude en période estivale des structures hydrologiques et phytoplanctoniques des panaches de la Loire et de la Vilaine. Elle fait suite, sur la même thématique, à la campagne hivernale NUTRIGAS (2001) et à la campagne printanière GASPROD (2002). |
| Tipo: Text |
Palavras-chave: Surveillance; Littoral; Phytoplancton; Phycotoxines; Bretagne; Pays de Loire. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/00144/25494/23648.pdf |
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| Kempf, Marc; Jacq, E; Le Guellec, C; Merceron, Michel; Monfort, Patrick; Nezan, Elisabeth; Ryckaert, Mireille. |
| This document presents a year-long (1994) environmental study conducted on a site of intensive farming of salmonids (mainly fario trout) in Camaret Bay. A set of parameters were considered for the body of water and the sea bed (flow patterns, hydrology, sedimentology, biology, chemistry) and complemented by video observations. The study concluded that there was a measurable effect from the farm in its current configuration, but that the impact was of a very limited intensity and scope that did not affect the environment in a substantial way. It is recommended that production growth be accompanied by a minimum amount of environmental assessment. |
| Tipo: Text |
Palavras-chave: Bretagne; Truite fario; Salmonidés; Environnement; Pisciculture marine. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/rapport-2834.pdf |
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| Merceron, Michel. |
| The yearly study of Ulva in Brittany aims at building a time series of its proliferations and corresponding nutrient loadings. The goal is to detect results of wilful loading reductions, and to distinguish them from natural variations. This first actually quantified study is the starting bench-mark of the process. Forty-five concerned sites were listed in 1997. They are nearly the same as in 1988, 1991 and 1994 (previous rough census). The Côtes d'Armor and then the Finistère are the most affected departments. The Morbihan is less and file et Vilaine not at all. Ulva biomass was precisely quantified in about fifteen locations during the growing season, along with nitrogen loadings of local streams (mostly nitrate). The fluxes of nitrogen - the limiting... |
| Tipo: Text |
Palavras-chave: Bretagne; Nitrate; Prolifération; Ulve; Eutrophisation; Brittany; Nitrate; Proliferation; Ulva; Eutrophication. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/1998/rapport-1580.pdf |
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| Merceron, Michel. |
| The 1998 survey of green tides on the Brittany coast was performed in the same way as that of 1997 in order to allow comparison. 11 includes an inventory ofail the concerned sites, and a precise assessment ofthirteen ofthem, the most loaded. On these ones, nitrogen fluxes were surveyed during the critical period, and the green seaweed stock on the beach and in the first waves was quantified. The climatic conditions were opposite between the two years, very dry in spring and summer 1997, and wet in 1998. The irradiance contrast was inverse, and less pronounced. The nitrate contents and mostly the flows were more important in 1998. They generated nitrogen fluxes about 3.3 times those of 1997. The total number of sites concerned in 1998 is clearly higher than... |
| Tipo: Text |
Palavras-chave: Bretagne; Nitrate; Prolifération; Ulve; Eutrophisation; Brittany; Nitrate; Proliferation; Ulva; Eutrophication. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-2665.pdf |
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| Talidec, Catherine; Berthou, Patrick; Jezequel, Michele; Lespagnol, Patrick. |
| The annual activity calendars of the 2,000 Breton fishing boats registered in the national POP file (with the exception of seafaring ships: 35 ocean-going tuna boats and 2 ships from Saint-Malo) were reconstituted for the year 1994 through surveys of the owners of these ships. Resorting to this method was necessary to overcome the weak statistical coverage of coastal fishing activity that is practiced within the 12 miles of territorial waters. This collection of information made it possible to build a database that contains, for each boat, the various trades practiced during the year 1994 and, if applicable, the periods of inactivity. By "trade", we mean the putting to use of a fishing vessel in order to catch one or several target species, in a given... |
| Tipo: Text |
Palavras-chave: Fishing gear; Database; Survey; Fishing fleet; Metier; Commercial fishing; Brittany; Engins de capture; Flottilles; Bases de données; Enquêtes; Metier; Pêche commerciale; Bretagne. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-2288.pdf |
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| Fleury, Pierre-gildas; Goyard, Emmanuel; Mazurie, Joseph; Claude, Serge; Bouget, Jean-francois; Langlade, Aime; Le Coguic, Marie-jo. |
| The network IFREMER/REMORA has watched every year, since 1993, from February to December, mortality, growth and quality criteria of two oyster class-size ("juveniles" of the first-year c1ass and "adults" of the second year c1ass), distributed among various stations of the French oyster areas. This has provided a quite standard and simple annual assessment of the rearing results, generally tallied with professional observations. From year to year, data series have been obtained, from which mean values (references), chronological trends or spatial differences can be analysed. Results in Brittany, from 1993 to 1998, show that, in a "normal" year, 30 g oysters grow to 60-80 g at the end of the year, with a mortality rate of 10-15%. Mortality occures mainly in... |
| Tipo: Text |
Palavras-chave: REMORA; Bretagne; Huître creuse; Crassostrea gigas; Mortalité; Croissance; Qualité; Polydora; REMORA; Brittany (France); Gigas oyster; Crassostrea gigas; Mortality; Growth; Quality; Polydora. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/00113/22386/20081.pdf |
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| Le Bec, Claude. |
| Depuis son introduction en Bretagne, au début des années 70, peu d'études ont été consacrées à l'huître creuse Crassostrea gigas sur cette région, sauf lors de pollutions (Amoco Cadis) ou d'anomalies de croissance de la coquille. En l'absence de données récentes, des stations expérimentales "d'élevage" ont été mises en place sur 8 sites conchylicoles bretons. Un lot d'huîtres de "18 mois" est réparti en début d'année dans 96 poches, à raison de 6 poches par station et 2 stations par site. Des mesures de biométrie, de composition de la chair, d'lindex de qualité, de taux de survie, et de parasitisme sont réalisées après 7 mois d'élevage. Après étude des résultats variable par variable, une analyse descriptive par A.C.P. montre 6 groupes de sites ou stations... |
| Tipo: Text |
Palavras-chave: Ostréiculture; Crassostrea gigas; Bretagne; Croissance; Pathologie; Composition; Suivi; Surveillance. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/00419/53093/54050.pdf |
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| Le Bec, Claude; Mazurie, Joseph. |
| The year 1990 is the second of a regional monitoring program on production assessment of Crassostrea in Britlany. 9 sites have been tested with 3 stations per site and 3 oysters bags in each station, at 3 different densities : 170, 210 and 250 oysters per bag. 18 month old oysters stocked in bags in march were analyzed 43 weeks later, by variables concerning growth, survival, quality... The growth was lower at higher densities, more or less according to sites. As previously, differences between sites and stations are observed, with some confirmations (higher mortalities in Aber Benoît site) and also evolutions (growth and Polydora infestations improvement in Pen Bé site). |
| Tipo: Text |
Palavras-chave: Bretagne; Crassostrea gigas; Mortalité; Indice de condition; Polydora; ACP; Brittany; Crassostrea gigas; Mortality; Condition index; Polydora; Factorial analysis. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00102/21318/18938.pdf |
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| Merceron, Michel. |
| On tens of sandy beaches of Brittany, a green seaweed (Ulva) blooms during spring and summer. In the sites where the proliferation is the most important, the total biomass amounted to 20 000 t of wet weight in 1997, at the time of maximum. These "green tides" occur every year in nearly the same locations. They have a very harmful impact on local tourism. In many communes, beached and rotting algae are collected and dumped (43 000 m 3 as a whole in 1997). The main development of biomass takes place between the surf zone and the bare sand.The outbreak requires three coexisting conditions : 1) a sandy beach gently sloping, 2) a weak residual current (i.e. once the tidal back and forth movement has been filtered), 3) a nitrogen loading, even moderate (ammonium... |
| Tipo: Text |
Palavras-chave: Brittany; Eutrophication; Proliferation; Ulva; Marine algae; Bretagne; Eutrophisation; Prolifération; Ulves; Algues marines. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/acte-46.pdf |
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| Bouget, Jean-francois; Camus, Patrick; Joly, Jean-pierre. |
| L'apparition de deux nouvelles espèces de gastéropodes prédateurs des bivalves en Baie de Quiberon Ocinebrellus inornatus et Rapana venosa, tous deux originaires d'extrême Orient n'est pas de nature à rassurer les professionnels de ce secteur, déjà confrontés, pour beaucoup d'entre eux, aux bigorneaux perceurs indigènes (Ocenebra erinacea) ou introduits depuis longtemps déjà (Urosalpinx cinera), ainsi qu'aux étoiles de mer. Ces deux nouvelles espèces sont cependant de plus grande taille que les espèces locales, et l'on peut penser que la lutte contre ces indésirables en sera facilitée. Le faible nombre de Rapana venosa capturés depuis 4 ans était également rassurant. Néanmoins la découverte par un professionnel de la Baie de Quiberon, au printemps 2001,... |
| Tipo: Text |
Palavras-chave: Ocinebrellus inornatus; Rapana venosa; Gastérope; Introduction espèce; Baie de Quiberon; Bretagne. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00092/20360/18021.pdf |
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| Registros recuperados: 61 | |
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