Multidisciplinary Acoustic Survey PELACUS0313: Preliminary Results on Fish Abundance Estimates and Distribution
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AuthorsCarrera, P. (Pablo); Riveiro, I. (Isabel); Oñate-Garcimartín, D. (Dolores); Miquel-Batle, J. (Joan); Iglesias, M. (Magdalena)
The PELACUS 0313 survey was undertook this year on board R/V Miguel Oliver, an oceanographic research stern trawler vessel similar to R/V Thalassa. The survey was characterised by a very bad weather conditions during the first two weeks which did not allow working properly. Moreover, the weather conditions during the rest of survey were almost similar. As a consequence, most of the coastal pelagic fish community remained very close to the coast, thus not accessible to the pelagic gear samplers. (33% of the total acoustic energy – NASC- was unable to be properly allocated into fish species). Outside the coastal area (>90 m depth) main abundance fish species was mackerel with 380.000 tonnes, corresponding to 1.725 million fish. On the contrary, sardine distribution was scarce, and occurred in small schools (probably as a consequence of the bad weather condition), with only 3.343 tonnes corresponding to 54.0 million fish. Age group 2 was the most abundant, which confirms the high ...