Competition for the fish - fish extraction from the Baltic Sea by humans, aquatic mammals, and birds

Hansson, StureStockholms universitet,Institutionen för ekologi, miljö och botanik (author)

Seals and fish-eating birds have increased in the Baltic Sea and there is concern that they compete with fisheries. Using data from around year 2010, we compare consumption of different fish species by seals and birds to the catch in the commercial and recreational fishery. When applicable this is done at the geographical resolution of ICES subdivisions. Predation by birds and mammals likely has limited impact on the populations of the commercially most important species (herring, sprat, and cod). In the central and southern Baltic, seals and birds consume about as much flatfish as is caught by the fishery and competition is possible. Birds and seals consume 2-3 times as much coastal fish as is caught in the fishery. Many of these species are important to the fishery (e. g. perch and whitefish) and competition between wildlife and the fishery is likely, at least locally. Estimated wildlife consumption of pike, sea trout and pikeperch varies among ICES subdivisions and the degree of competition for these species may differ among areas. Competition between wildlife and fisheries need to be addressed in basic ecosystem research, management and conservation. This requires improved quantitative data on wildlife diets, abundances and fish production.

Bergström, UlfSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)50486 (author)
Bonsdorff, Erik (author)
Härkönen, Tero (author)
Jepsen, Niels (author)
Kautsky, LenaStockholms universitet,Institutionen för ekologi, miljö och botanik(Swepub:su)lkaut (author)
Lundström, KarlSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)49225 (author)
Lunneryd, Sven-GunnarSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)49923 (author)
Ovegård, MariaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:slu)49590 (author)
Salmi, Juhani (author)
Sendek, Dmitry (author)
Vetemaa, Markus (author)
Stockholms universitetInstitutionen för ekologi, miljö och botanik (creator_code:org_t)
Sveriges lantbruksuniversitet

In:ICES Journal of Marine Science: Oxford University Press (OUP)75:3, s. 999-10081054-31391095-9289

By the author/editor: Hansson, Sture; Bergström, Ulf; Bonsdorff, Erik; Härkönen, Tero; Jepsen, Niels; Kautsky, Lena; show more...; Lundström, Karl; Lunneryd, Sven-G ...; Ovegård, Maria; Salmi, Juhani; Sendek, Dmitry; Vetemaa, Markus; show less...

About the subject

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...; and Fish and Aquacul ...

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Other Agricultur ...; and Fish and Wildlif ...

By the university: Stockholm University; Swedish University of Agricultural Sciences

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