Spatial management of marine resources can enhance the recovery of predators and avoid local depletion of forage fish

Eero, Margit, Vinther, Morten, Haslob, Holger, Huwer, Bastian, Casini, Michele, Storr-Paulsen, Marie and Köster, Friedrich W. (2012) Spatial management of marine resources can enhance the recovery of predators and avoid local depletion of forage fish Conservation Letters, 5 (6). pp. 486-492. DOI 10.1111/j.1755-263X.2012.00266.x.

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Abstract

The eastern Baltic cod stock has recently started to recover, after two decades of severe depletion, however with unexpected side effects. The stock has not re-occupied its former wide distribution range, but remains concentrated in a limited area in the southern Baltic Sea. The biomass of forage fish, i.e., sprat and herring, is historic low in this area, which in combination with increasing cod stock results in locally high predation mortality of forage fish and cannibalism of cod. In line with low prey availability, body weight and nutritional condition of cod drastically declined. In the southern Baltic Sea, cod competes with pelagic fisheries for the limited resources of sprat and herring, while the largest biomass of these species is currently found outside the distribution range of cod. Accounting for spatial overlap between species is crucial in developing ecosystem based fisheries management to enhance the recovery of predator stocks.

Document Type: Article
Additional Information: WOS:000312309800009
Keywords: Baltic Sea; cod recovery; ecosystem based fisheries management; food limitation; forage fish; local depletion; predator-prey overlap; COD GADUS-MORHUA; TROPHIC CASCADES; FISHERIES MANAGEMENT; SCOTIAN SHELF; BALTIC SEA; ECOSYSTEM; STRATEGIES; DYNAMICS; ALKOR
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Evolutionary Ecology of Marine Fishes
Refereed: Yes
DOI etc.: 10.1111/j.1755-263X.2012.00266.x
ISSN: 1755-263X
Date Deposited: 02 Aug 2012 08:10
Last Modified: 20 Sep 2016 13:29
URI: http://eprints.uni-kiel.de/id/eprint/14948

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