We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The importance of predator–prey overlap: predicting North Sea cod recovery with a multispecies assessment model.
- Authors
Kempf, Alexander; Dingsør, Gjert Endre; Huse, Geir; Vinther, Morten; Floeter, Jens; Temming, Axel
- Abstract
Kempf, A., Dingsør, G. E., Huse, G., Vinther, M., Floeter, J., and Temming, A. 2010. The importance of predator–prey overlap: predicting North Sea cod recovery with a multispecies assessment model. – ICES Journal of Marine Science, 67: 1989–1997.The overlap between predator and prey is known as a sensitive parameter in multispecies assessment models for fish, and its parameterization is notoriously difficult. Overlap indices were derived from trawl surveys and used to parametrize the North Sea stochastic multispecies model. The effect of time-invariant and year- and quarter-specific overlap estimates on the historical (1991–2007) and predicted trophic interactions, as well as the development of predator and prey stocks, was investigated. The focus was set on a general comparison between single-species and multispecies forecasts and the sensitivity of the predicted development of North Sea cod for the two types of overlap implementation. The spatial–temporal overlap between cod and its predators increased with increasing temperature, indicating that foodweb processes might reduce the recovery potential of cod during warm periods. Multispecies scenarios were highly influenced by assumptions on future spatial overlap, but they predicted a considerably lower recovery potential than single-species predictions did. In addition, a recovery of North Sea cod had strong negative effects on its prey stocks. The consequences of these findings for management are discussed.
- Subjects
NORTH Sea; COD fisheries; FISH population measurement; FISHERY management; STOCHASTIC processes; PREDATORY animals
- Publication
ICES Journal of Marine Science / Journal du Conseil, 2010, Vol 67, Issue 9, p1989
- ISSN
1054-3139
- Publication type
Article
- DOI
10.1093/icesjms/fsq114