Data/hora: 10/06/2024 07:55:01

Provedor de dados: | Institutional Archive of Ifreme (ArchiMer)
País: | France
Título: | Manual of fisheries survey protocols. PELGAS surveys (PELagiques GAScogne)
Autores: | Doray, Mathieu; Badts, Vincent; Masse, Jacques; Duhamel, Erwan; Huret, Martin; Doremus, Ghislain; Petitgas, Pierre.
Data: | 2014-03
Ano: | 2014
Resumo: | The PELGAS sea cruises aim at monitoring the Bay of Biscay pelagic ecosystem, in order to provide scientific data for the implementing of an ecosystemic management of Biscay living ressources. The spatial and temporal dynamics of small pelagic fish populations are specifically monitored, with a focus on anchovy populations. The cruise hence takes place in spring, during anchovy spawning, to allow for the assessment of both eggs and adult stages. The PELGAS ecosystemic cruise aims at collecting data at each level of the Biscay trophic chain. Data are collected continuously along parallel transects covering the whole Bay of Biscay, in order to thoroughly characterize the horizontal and vertical structures of the pelagic ecosystem. Multibeam and multifrequency echosounders provide real time information on the spatial patterns and abundance of pelagic organisms ranging from plankton to fish. Simultaneously, a Continuous Fisg Egg Sampler provide complementary data on small pelagic fish eggs. The presence and abundance of seabirds and marine mammals are also continuously recorded. Acoustic targets are punctually identified by fishing (pelagic trawling and plankton nets) and/or using video (trawl camera, Remotely Operated Vehicle EROC, plankton video profiler). CTD stations are actually performed over the whole Bay of Biscay to provide hydrological information. In situ measurements are compared to satellite and hydrodynamic models outputs. This documents describes the sampling protocols in use during the PELGAS survey, as well as the methodology to derive biomasse estimates from acoustics and fishing data.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00191/30259/28714.pdf

DOI:10.13155/30259

http://archimer.ifremer.fr/doc/00191/30259/

Formato: | application/pdf

Fonte:

2014 Ifremer

info:eu-repo/semantics/openAccess

restricted use