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Registros recuperados: 4
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Caractérisation et dynamique des turbidités en zone côtière : L'exemple de la région marine Bretagne Sud ArchiMer
Tessier, Caroline.
The space and time turbidity variability in Southern Brittany was studied, from the combination of results of hydrological campaigns, long-term instrumented moorings, satellite observations and 3D process-based numerical modelling. Previous observations exhibit a cross-shore concentration gradient with values hardly exceeding 30 mg/l beyond the littoral zone. Acoustic profilers (ADCP) were moored to measure currents, waves and the associated dynamics of fine particles. Time series of mass concentration in the whole water column were estimated from the analysis of the backscattered signal. During wave episodes, values can reach 100 mg/l at 1.50 m above bottom, just outside the Bay of Vilaine. The empirical calibration of the signal with independent...
Tipo: Text Palavras-chave: Southern Brittany; MARS 3D numerical model; Acoustic backscattering; Acoustic current profiler; Waves; Circulations; Turbidity; Bretagne Sud; Modèle numérique MARS 3D; Rétrodiffusion acoustique; Profileur acoustique de courant; Vagues; Circulations; Turbidité.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-2325.pdf
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Diversité structurelle et fonctionnelle des peuplements sablo-vaseux de Bretagne sud : Impact de l'expansion d'Haploops nirae ArchiMer
Rigolet, Carine.
This thesis aims here, based on the case of the Bay of Concarneau, to understand the impact of the development of dense populations of the tubiculous amphipod Haploops nirae on the structural and functional diversity of sandy-mud communities of South Brittany. The study of Haploops communities was developed on various levels of organization of life, from the specific role of Haploops nirae to functional role of Haploops community in the ecosystem passing through the description of the community composition and its role on the biodiversity. Our results suggest firstly that the functional role of Haploops nirae alone (filtration pressure, secondary production) is potentially important. Moreover, the physical changes induced by Haploops were found to have...
Tipo: Text Palavras-chave: Ampeliscidae; Réseau trophique; Diversité fonctionnelle; Macrofaune benthique; Diversité; Bretagne Sud; Espèce ingénieure; Ampeliscidae; Benthic macrofauna diversity; Food web; Functional diversity; Engineer species; South Brittany.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00134/24549/22582.pdf
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Perspectives d'exploitation des petits bivalves ArchiMer
Berthou, Patrick.
Tipo: Text Palavras-chave: France; Brittany; Bivalvia; Economics; Trade; Conservation; Catching; Stock; Fisheries; Manche Occidentale; Bretagne Sud; Bivalvia; Valorisation; Methode Capture; Gestion Stock; Exploitation.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/1987/rapport-2208.pdf
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Rapport d'Activité du laboratoire DRV-RH Lorient. Année 2000 ArchiMer
Ifremer.
L'activité du laboratoire « Ressources Halieutiques » de Lorient s'inscrit dans la mission de service public de l'Institut en général et des laboratoires côtiers en particulier. Elle comprend un volet « recueil et archivage » des données biologiques et halieutiques, une partie « recherche et application de la recherche » pour l'évaluation des pêcheries, et une partie « avis et expertises ». La zone de compétence du laboratoire s'étend des quartiers maritimes de Douarnenez à St. Nazaire pour ce qui concerne les ports d'armement, et de l'Ecosse au sud du golfe de Gascogne, de la côte au talus continental, pour les zones de pêche. Près de 1500 navires sont immatriculés dans ces quartiers, et plus de 40% de la valeur des débarquements français se font dans la...
Tipo: Text Palavras-chave: Diagnostic sur les ressources; Bretagne Sud; Bande côtière; SIH; Activité des flottilles; Recherche et application de la recherche; Mesures de gestion; Avis et expertises; Recueil archivage.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/rapport-2574.pdf
Registros recuperados: 4
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