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| Registros recuperados: 61 | |
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| Blaise, Emmanuel; Suanez, Serge; Stephan, Pierre; Fichaut, Bernard; David, Laurence; Cuq, Veronique; Autret, Ronan; Houron, Julien; Rouan, Mathias; Floc'H, France; Ardhuin, Fabrice; Cancouet, Romain; Davidson, Robert; Costa, Stephane; Delacourt, Christophe. |
| Between December 2013 and March 2014, a cluster of about 12 storm events hit the coast of Brittany with an exceptional frequency. It was in February that these storm events were the most frequent and particularly virulent. The significant wave heights measured off Finistere reached respectively 12.3 m and 12.4 m during Petra and Ulla storms on February 5 and 14. However, analysis of hydrodynamic conditions shows that only three episodes promoted extreme morphogenetic conditions because they were combined with high spring tide level. The first one occurred on January 1 to 4, it was followed by events from February 1 to 3, and March 2-3. During these three extreme events observed tide levels were above highest astronomical tide level (HAT). Maximum surge... |
| Tipo: Text |
Palavras-chave: Tempête; Érosion; Trait de côte; Marée de vive-eau; Bretagne; Surcote; Storm; High spring tide; Surge; Erosion; Shoreline; Brittany. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00310/42171/43029.pdf |
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| Pitel, Mathilde; Berthou, Patrick; Fifas, Spyros. |
| Basically, a dredge is a bottom-towed gear and consists of a metal frame with a blade or teeth, to dig into the sediment and extract the shelled molluscs, and a mesh bag to collect the catch. Whereas hand dredging is observed on some intertidal beds (Donax trunculus in France), the use of dredge generally needs a fishing boat. There is a great diversity of dredge types, with specific designs used to target different species in particular beds: Manual dredges for Donax (Donax trunculus), Warty venus (Venus verrucosa) and clams (Venerupis pulastra, Ruditapes sp) Dredges for King scallops (Pecten maximus) Dredges for Warty venus (Venus verrucosa) Dredge for Queen scallops (black and white, Chlamys varia and Chlamys opercularia) Dredges for small... |
| Tipo: Text |
Palavras-chave: Management; Environmental impact; Spisula; Bittersweet palourdi; Fishing boat; Clam; Dredge; Brittany; Gestion; Impact environnemental; Spisula; Amande; Navire de pêche; Drague; Bretagne. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/rapport-4608.pdf |
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| Henaff, Alain; Le Cornec, Erwan; Jabbar, Marie; Petre, Anne; Corfou, Jeremy; Le Drezen, Yann; Van Vliet-lanoe, B.. |
| Knowledge regarding the systemic vulnerability of coastal territories to erosion and flood has progressed during the last decades thanks to the consideration of hazards but also of other components such as the stakes, the management and the social representations of the coastal risks. However, in numerous cases the development and urbanization of coastal territories submitted to the coastal risks continues. It results in the increase of exposed populations as well as in the increase of the cost of exposed properties, increasing in return their vulnerability. So, in the objective to improve the management strategies and to strengthen the memory of the risk, the need to specify the characteristics of hazards remains important. In this sense, the intensity,... |
| Tipo: Text |
Palavras-chave: Risques côtiers; Aléa; Érosion côtière; Submersion marine; Caractérisation spatiale; Bretagne; Coastal risks; Hazard; Coastal erosion; Coastal flooding; Spatial characterization; Brittany. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00638/75006/75785.pdf |
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| Buestel, Dominique; Dao, Jean-claude; Lemarie, Gilles. |
| Since 1973 some pectinides spat collection experiments have been conducted by the Fishery team of the Brittany Oceanology Centre, on two deposits exploited by commercial fishing: the roadsted of Brest and especially the St-Brieuc Bay The experiment carried out in 1973 was the first French attempt on this group of species and the results have been very encouraging: although the technology used was rudimentary, the best collectors enabled the collection of 30 to 50 king scallops (Pecten maximus) each and of 6,000 to 8,000 scallops (Chlamys varia and Chlamys opercularis). The research protocol used enabled the determination of the sequential aspect of the fixation, and of the growth speed of the young animals. In addition, the difference between both deposits... |
| Tipo: Text |
Palavras-chave: Collecteur; Bretagne; Coquilles Saint Jacques; Pecten maximus; Reproduction; Naissain. |
| Ano: 1979 |
URL: http://archimer.ifremer.fr/doc/1979/acte-6542.pdf |
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| Marteil, Louis. |
| Depuis 1945, nous avons entrepris en Bretagne la reconstitution des bancs naturels d'Ostrea edulis depuis longtemps disparus ou fortement appauvris. Cette oeuvre a été réalisée d'abord dans les centres de captage du littoral atlantique; elle a été étendue ultérieurement aux côtes de la Manche, de Brest à Cancale, et sur les côtes de Vendée, en baie de Noirmoutier. Les travaux sont réalisés par des organismes professionnels, des sociétés ou des personnes privées suivant qu'il s'agit de terrains voués à la pêche ou à la culture. A l'heure actuelle, plus de vingt gisements ont bénéficié de ces mesures. |
| Tipo: Text |
Palavras-chave: Huîtres plates; Ostrea edulis; Bancs naturels; Restructuration; Bretagne. |
| Ano: 1965 |
URL: http://archimer.ifremer.fr/doc/00004/11503/8073.pdf |
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| Jabbar, Marie; Henaff, Alain; Deschamps, Anne. |
| Nearshore is an integrated part of the coastal zone, as well as beaches and coastal dunes. However, they remain poorly studied compared to the emerged part of the system, because of the limited access for scientific monitoring. The nearshore of Combrit - Ile-Tudy (south Brittany, France), addressed in this paper, is a good example. The first aim of this study is to present a methodology for the interpretation of old bathymetric surveys (supplied by the French naval hydrographic and oceanographic service SHOM) which considers all the inaccuracies related to this type of data. Then, this method is implemented in order to depict the morphological evolution of the nearshore by comparing the ancient bathymetric surveys (19th and 20th centuries) and the recent... |
| Tipo: Text |
Palavras-chave: Avant-plage; Morphologie sous-marine; Dynamique morpho-sédimentaire; Levés bathymétriques multi-temporels; Bretagne; Nearshore; Submarine morphology; Dynamic morphosedimentary; Multitemporal bathymetric surveys; Brittany. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00591/70263/68853.pdf |
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| Tige, Gilbert; De Kergariou, Gabriel; Cochennec, Nathalie; Rabouin, Marie-agnès. |
| A systematic surveillance progam conducted since 1980 along the coasts of Britanny has followed the evolution and epidemiological state of the natural O. eulis oyster beds and seed areas in the intertidal zones and deep water. Presently, Marteilia refringens exists endemically in Brittany estuaries ; the rate and degree of infestation varies from year to year depending on the hydrological conditions and the geographical region. In no case, however, is the return of flat oyster culture envisoned. Bonamia ostreae is present not only in the estuaries but also in the deep-water rearing areas (Baie de Quiberon, Cancale, Baie de St Brieuc). The infestation increases with age, but also depends on the quantity of the stock and the culture practises. In particular,... |
| Tipo: Text |
Palavras-chave: Huître plate; Ostrea edulis; Maladie; Bonamia ostreae; Marteilia refringens; Bretagne; Oyster; Ostrea edulis; Diseases; Bonamia ostreae; Marteilia refringens. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/00022/13299/10353.pdf |
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| Chasse, C.. |
| The wreckage of the tanker "AMOCO CADIZ" on the reefs of PORTSALL was the fourth oil spill in ten years on the coast of Brittany : it also is the largest known oil spill in the world. The patches at sea were driven eastward by westerly winds from March 17 to March 23. 140 Km of coast line was polluted. The oil spreaded more slowly towards the north west, south and north west where it spoiled some 375 Km of touristic sea coast and important fishing grounds. The coastline is six kilometers wide ; it includes islands and large reefs. The local tidal currents are very strong and reach more than three knots, during spring tides which may rise up to nine meters in a rough sea conditions. The turbulence of the water soon dispersed the slicks and mixed the oil... |
| Tipo: Text |
Palavras-chave: Marée noire; AMOCO CADIZ; Bretagne; Bilan écologique; Littoral; Oil spill; AMOCO CADIZ; Brittany; Ecological assessment; Shoreline. |
| Ano: 1978 |
URL: http://archimer.ifremer.fr/doc/00306/41722/40933.pdf |
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| Billy, Stéphanie; Peronnet, Isabelle; Salaun, Michele. |
| The Gulf has very tiled sea beds, and the surface areas of habitats suitable for ormer populations are rather reduced (1.56km2). Three zones have ormer densities of interest from the point of view of profitability, Brannec, lrus and Creizig. But since their surface area is not great, the exploitable biomass, that corresponding to individuals of a size greater than 80mm (legal catch size), is average. These three zones would be exploitable but following a limited fishing effort. The sectors of Ile aux moines and Jument and Henn Tenn show average to low densities and are not therefore exploitable in a profitable way. Finally, Gavrinis and le Logeo have revealed low densities of ormers, this could be due to an intensive illegal exploitation. In fact, many... |
| Tipo: Text |
Palavras-chave: Stock assessement; Exploitable population; Bay of Morbihan; Haliotis tubertulata; Brittany; Biomasse; CLPM Auray/Vannes; Population exploitable; Bretagne; Golfe du Morbihan; Haliotis tubertulata; Ormeaux. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/rapport-2326.pdf |
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| Buestel, Dominique; Dao, Jean-claude; Gohin, Francis. |
| The efficiency of the scallop dredge used in baie de St Brieuc (Britany) has been directly determined by divers swimming along the track marks left on the bottom. Results, concerning essentially year class two, show that efficiency and damage caused by the dredge on scallops are highly variable according to nature of the sea bed. On smooth grounds, the average efficiency is 67% and the average percentage for severely damged scallops is 2% ; on rough grounds, theses percentages are respectively 30% and 17%. These results associated with a dredge survey on a particular area of the baie de St Brieuc allow an assessment of scallops abundance. The statistical method used, relevant to the geostatistic theory, takes into account the scallop spatial distribution... |
| Tipo: Text |
Palavras-chave: Estimation stock; Coquille Saint Jacques; Dragage; Saint-Brieuc; Méthode géostatistique; Bretagne. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/00009/12001/8695.pdf |
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| Kuntz, Grégoire. |
| Depuis le début des années 1990, se sont étendues sur le littoral français des mortalités estivales touchant les juvéniles de l'huître creuse, Crassostrea gigas. La rivière d'Auray est un secteur d'élevage conchylicole particulièrement affecté par ce phénomène. Une enquête menée sur trois années (1995 à 1997) tente de dresser le bilan de ces mortalités et d'identifier les facteurs responsables. Au cours de l'été 1997 différents suivis environnementaux (phytoplancton, physicochimie, .. . ), physiologiques (croissance, maturation, ... ) et pathologiques (histologie,PCR, ... ) ont été menés afin d'avoir une approche la plus large possible des différents facteurs potentiellement impliqués lors de ces mortalités. |
| Tipo: Text |
Palavras-chave: Mortalité; Maladie; Juvéniles; Crassostrea gigas; Rivière d'Auray; Bretagne. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00426/53728/54604.pdf |
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| Grizel, Henri. |
| The study concerns two previously unseen Protozoa, Marteilia refringens and Bonamia ostreae, responsible for epizootics in the flat oyster, Ostrea edulis L. The epizootiological aspect, the impact of diseases on Breton oyster farming and the research for appropriate prophylaxes is addressed. The morphology, the ultrastructure and certain phases of the growth cycle are described for the two parasites, as well as their cyto- and histopathogenic effects. The epizootiology explains the evolution of the diseases in space and time, their conditions for propagating, the sensitivity of the parasites and the receptivity of various test hosts. A summary analysis of Breton oyster farming before and during the epizootic is done. It makes it possible to judge the... |
| Tipo: Text |
Palavras-chave: Impact; Prophylaxies; Epizootiologie; Bonamia ostreae; Martelia refrengens; Protozoaires; Epizooties; Ostrea edulis; Huître plate; Ostréiculture; Bretagne. |
| Ano: 1985 |
URL: http://archimer.ifremer.fr/doc/1985/these-2581.pdf |
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| Autissier, Isabelle; Coum, Andrée; Cuillandre, Jean Pierre; Veron, Gerard; Latrouite, Daniel. |
| At the end of the seventies, as fishing abundance (based on Catch Per Unit Effort) in crabs and lobster fishery steadily declined, operating expenses increased, and fishing boats changed strategy (changing metiers, covering larger distance to fishing areas, fishing seasons being extended, ...) professionals and scientists aimed to consider reinforcing management measures. To enlighten and support potential related decisions, the Comité Régional des Pêches et Cultures Marines de Bretagne (Regional Committee for fishing and farming in Brittany), together with the ISTPM (Ifremer since 1984), conducted a survey on the exploited populations and gave a review of the involved Breton fleet. This report shows the results of a survey conducted among fishermen,... |
| Tipo: Text |
Palavras-chave: Landings; Catch rates; Fishing area; Fishing effort; Fleet; Brittany; Edible crab; Lobster; Spider crab; Apport; Rendement; Zone de pêche; Effort de pêche; Flottille; Bretagne; Tourteau; Homard; Araignée. |
| Ano: 1981 |
URL: http://archimer.ifremer.fr/doc/1981/rapport-1548.pdf |
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| Pitel, Mathilde; Fifas, Spyros; Berthou, Patrick. |
| In the 1960s, with a drop in the king scallop stock, the clam became a substitution resource with productions of over 400 tonnes. The drop in 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 demographic strategy. Large deposits are fairly rare. In 7 years, only one age group, born in 1971, withstood the fishery. Many age groups of satisfactory abundance, from the end of the 80s on, combined with a total disruption of the fishery for a few years, lead to a recovery of the stock with fishing levels equivalent (today) to those of the 1950s. The clam, though less iconic than the king scallop in the local context, has now been for a number of... |
| Tipo: Text |
Palavras-chave: Campaign; Jeancani; Survey; Venus verrucosa; Clams; Bay of Brest; Brittany; Jeancani; Campagne à la mer; Venus verrucosa; Praires; Rade de Brest; Bretagne. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/rapport-4603.pdf |
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| Pitel, Mathilde; Martin, Stephane; Fifas, Spyros; Huet, Jerome; Berthou, Patrick. |
| Pendant les années 50, la praire a joué un rôle secondaire dans le contexte maritime local. Au cours des années 50, cette espèce était ciblée par une flottille différente de la coquille Saint-Jacques de la rade de Brest, à capacité de capture modeste (flottille du Relecq Kerhuon) permettant la réalisation des captures annuelles moyennes de l'ordre de 150 tonnes. La décennie 60, après l'effondrement du stock coquillier a vu la praire occuper une place de ressource de substitution pour atteindre des productions dépassant les 400 tonnes. Les premières étapes de l'évolution de cette pêcherie sont détaillées par Le Gall (1969) et Piboubès (1973). Petit à petit, la flottille s'est transformée (à partir des années 70, entrée progressive des goémoniers dans la... |
| Tipo: Text |
Palavras-chave: Jeancani; Venus verrucosa; Clams; Bay of Brest; Brittany; Jeancani; Venus verrucosa; Ressource de substitution; Praires; Rade de Brest; Bretagne. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/rapport-4602.pdf |
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| Registros recuperados: 61 | |
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