Small pelagic fish biomass and abundance estimates from the PELGAS survey in the Bay of Biscay
|Temporal extent||2000 -2019|
|Author(s)||Doray Mathieu1, Duhamel Erwan1, Masse Jacques1, Petitgas Pierre1|
|Affiliation(s)||1 : Ifremer, France|
|Keyword(s)||biomass, abundance, Bay of Biscay, fisheries acoustics, midwater trawl, anchovy, sardine, horse mackerel, Atlantic mackerel, boarfish, blue whiting, sprat, Atlantic chub mackerel|
The Pélagiques Gascogne (PELGAS, Doray et al., 2000) integrated survey aims at assessing the biomass of small pelagic fish and monitoring and studying the dynamics and diversity of the Bay of Biscay pelagic ecosystem in springtime. PELGAS has been conducted within the EU Common Fisheries Policy Data Collection Framework and Ifremer’s Fisheries Information System. Details on survey protocols and data processing methodologies can be found in Doray et al., (2014, 2018a).
This dataset comprises the biomass (in metric tons) and abundance (in thousands of individuals) of small pelagic fish estimated during the PELGAS survey in the Bay of Biscay in springtime. The dataset also includes the estimation coefficient of variation, derived based on the hydroacoustic methodology described in Doray et al. (2010), and the survey area. Those estimates have been validated by the ICES WGACEGG group and provided to the ICES WGHANSA group for stock assessment purposes. Data have been used in Doray et al., 2018b.
|Utilisation||Data are published without any warranty, express or implied. The user assumes all risk arising from his/her use of data. Data are intended to be research-quality, but it is possible that these estimates or the data themselves contain errors. It is the sole responsibility of the user to assess if the data are appropriate for his/her use, and to interpret the data accordingly. Authors welcome users to ask questions and report problems.|
|Acknowledgements||PELGAS surveys have been funded by the European Common Fishery Policy Data Collection Framework through the European Maritime and Fisheries Fund, the Marine Strategy Framework Directive, and Ifremer. We want to acknowledge the joint efforts of R/V Thalassa crews and PELGAS scientists that made the survey possible.|
Sensors metadata are described in Doray et al., (2014, 2018a).