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MSY oriented management of the Baltic Sea herring under regime shifts
Högskolan i Skövde, Institutionen för vård och natur. Högskolan i Skövde, Forskningscentrum för Systembiologi.
Högskolan i Skövde, Institutionen för vård och natur. Högskolan i Skövde, Forskningscentrum för Systembiologi.ORCID-id: 0000-0002-2055-4284
University of Tartu, Estonian Marine Institute, Tallin, Estonia.
Fisheries and Environmental Management Group, University of Helsinki, Finland.
2011 (engelsk)Inngår i: ICES report of the Baltic Fisheries Assessment working Group (WGBFAS), Copenhagen: ICES , 2011, s. 752-798Kapittel i bok, del av antologi (Annet vitenskapelig)
Abstract [en]

The ecosystem of the baltic sea has undergone dramatic changes, perhaps a regime-shift, during the last four decades. The Baltic Sea Herring SSB has declined to a third and weight-at-age has halved due to plankton prey deficits. The management objective of the herring is currently in the transition to a cautionary maximum sustainable yield (MSY). We modelled the main basin Baltic Sea herring under the currernt regime, and analysed the effect of a ercovery of the cod stock and the food availability as they were in the early 1980s. We recommend a target F MSY of 0.16, but with a recovery of the cod, recommended target F MSY is is 0.10. A simultaneous increase in both cod and food availability is estimated to increase the yield with 40% at the target F MSY is 0.20. We present functions to calculate F MSY and estimate the expected yield depending on the abundance of cod and food-availability. A retrospective application of our functions indicates over-fishing in the 1990s  and early 2000s, and a net loss in yields with a landing value of about E440 Millions.

sted, utgiver, år, opplag, sider
Copenhagen: ICES , 2011. s. 752-798
Emneord [en]
density-dependence, fishing mortality, productivity, sustainability, weight at age, yield
HSV kategori
Forskningsprogram
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:his:diva-5742OAI: oai:DiVA.org:his-5742DiVA, id: diva2:517605
Merknad

WD 6

Tilgjengelig fra: 2012-04-24 Laget: 2012-04-24 Sist oppdatert: 2017-11-27bibliografisk kontrollert

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http://www.ices.dk/sites/pub/Publication%20Reports/Expert%20Group%20Report/acom/2011/WGBFAS/Annex%2016%20Working%20Documents.pdf

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Holmgren, Noél M. A.Norrström, Niclas

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