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Selective fishing induces density-dependent growth
SLU Swedish University of Agricultural Sciences, Sweden.
RISE., SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SIK – Institutet för livsmedel och bioteknik. University of Gothenburg, Sweden.ORCID-id: 0000-0003-0814-5258
2014 (engelsk)Inngår i: Nature Communications, E-ISSN 2041-1723, Vol. 5, artikkel-id 4152Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Over the last decades, views on fisheries management have oscillated between alarm and trust in management progress. The predominant policy for remedying the world fishing crisis aims at maximum sustainable yield (MSY) by adjusting gear selectivity and fishing effort. Here we report a case study on how striving for higher yields from the Eastern Baltic cod stock by increasing selectivity has become exceedingly detrimental for its productivity. Although there is a successive increase in numbers of undersized fish, growth potential is severely reduced, and fishing mortality in fishable size has increased. Once density-dependent growth is introduced, the process is self-enforcing as long as the recruitment remains stable. Our findings suggest that policies focusing on maximum yield while targeting greater sizes are risky and should instead prioritize catch rates over yield. Disregarding the underlying population structure may jeopardize stock productivity, with dire consequences for the fishing industry and ecosystem structure and function.

sted, utgiver, år, opplag, sider
2014. Vol. 5, artikkel-id 4152
Emneord [en]
Food Engineering
Emneord [sv]
Livsmedelsteknik
HSV kategori
Identifikatorer
URN: urn:nbn:se:ri:diva-9298DOI: 10.1038/ncomms5152Scopus ID: 2-s2.0-84902532328OAI: oai:DiVA.org:ri-9298DiVA, id: diva2:967172
Tilgjengelig fra: 2016-09-08 Laget: 2016-09-08 Sist oppdatert: 2023-06-07bibliografisk kontrollert

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