Presence of anchovy in acoustic research surveys PELACUS 2001-2005
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Autor/esPorteiro-Lago, C. (Carmen); Miquel-Batle, J. (Joan); Iglesias, M. (Magdalena); Bellido-Millán, J.M. (José María); Villamor, B. (Begoña)
The research survey PELACUS started at the 80s, particularly since 1983, and from 1986 onwards is a spring survey. Although it changed its name from time to time it has always been the northern Spanish acoustic research survey. Its main aim is the assessment of pelagic resources by acoustics tools across the northwest and northern Spanish waters. This survey is mainly targeted at sardine, although other pelagic resources are also taken into account, such as horse mackerel, mackerel and anchovy. The sampling area comprises the northern part of Portugal (ICES area IXa Central North), in the vicinity of Porto and extends to the southern Atlantic French waters (ICES area VIIIb), in the vicinity of Arcachon. Depths are from 30 to 200 m. The acoustic device is an echosounder EK-500, working at frequencies of 12, 38 and 120 KHz. This echosounder was replaced in 2005 by a new echosounder EK-60, working at frequencies of 18, 38, 70 and 120 KHz. Fish samples were collected by a pelagic ...