Consulta: creatorFacets:"Walker, P"
Registros recuperados: 2
Data/hora: 05/06/2024 08:09:11

Surveillance écologique. Site de Flamanville. Le domaine benthique : étude par sonar latéral et prises de vue sous-marines (1983-1984)
Provedor de dados: 5
Autores: Auffret, J.p.; Berne, Serge; Gresselin, F; Guillaumont, Brigitte; Walker, P.
The study of the sublittoral bottoms near the Flamanville site has been tackled in the pilot studies (1976) and project studies (1977 - 1979) in the aim of assessing benthic populations. Given the coarse nature of the sea bed, the identification (figure 1) was carried out using a towed tool susceptible of sampling in a semi-quantitative way on a wide variety of substrates: a Rallier du Baty drag. Apart from the rocky bottoms lying right next to the coast, on which no information could be collected, two types of populations have been identified.
Tipo: Text
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/rapport-6464.pdf

Crepidula fornicata L. (mollusque, gastéropode) en baie de Marennes-Oléron : cartographie des fonds par sonar à balayage latéral et estimation du stock
Provedor de dados: 5
Autores: Sauriau, Pierre-guy; Pichocki-seyfried, C; Walker, P; De Montaudouin, Xavier; Palud, Cecile; Heral, Maurice.
Extensive and detailed subtidal ground mapping of the Marennes-Oleron Bay and Fouras-Aix areas was performed with a side-scan sonar. Side-scan sonographs gave a comprehensive view of sedimentological bottom environments and also allowed us to outline locations of grounds colonised by the gastropod mollusc Crepidula fornicata L. with a precise estimate of their surface. A sedimentological map of the centre of the Marennes-Oleron Bay is given, describing spatial organisation of the following four types of sediment: pure mud, fine sand, coarse sand and rocks. Crepidula beds were also recognised on sonographs and were estimated to cover 181 hectares in the Fouras-Aix area and 615 hectares within the Marennes-Oleron Bay. Standard sampling methods were then...
Tipo: Text
Palavras-chave: Crepidula fornicata; Cartographic; Stock; Sonar à balayage latéral; Marennes-OlCron; Crepidula fornicata; Mapping; Stock assessment; Side-scan sonar; Marennes-Oleron Bay.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/publication-854.pdf