Journal
ICES JOURNAL OF MARINE SCIENCE
Volume 75, Issue 5, Pages 1832-1836Publisher
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsy054
Keywords
Baltic Sea; cormorants; fisheries; food consumption; Perca fluviatilis; predators; Sander lucioperca
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Hansson et al. (2017) concluded that competition between fisheries and piscivorous mammals and birds exists in the Baltic Sea, based on the estimation of biomass of the fish species consumed in the ICES subdivisions. We compared their results to the data and scientific knowledge from the coastal waters of Finland and show that local differences in fisheries, fish assemblages and abundance of predators should be taken into account to reliably assess potential competition. Hansson et al. (2017) did not include the piscivorous fish in their analysis, but these may be the most important predators. In the Archipelago Sea, for instance, the consumption by fish predators is considerably larger than that of cormorants.
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