期刊
ICES JOURNAL OF MARINE SCIENCE
卷 67, 期 5, 页码 909-915出版社
OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsq008
关键词
ecosystem model; energy content; NE Atlantic; prey quality; proximate composition
资金
- Ministere de l'Ecologie et du Developpement Durable
- Communaute d'Agglomeration de la Ville de La Rochelle
- EU [244966]
- Agence Nationale de la Recherche Technique
Collapses of high-energy dense concentrations of prey species induce negative effects on populations of top predators. Knowledge of prey quality appears to be crucial in ecosystem modelling and management. The aim here was to provide baseline data of forage species quality in the Bay of Biscay. Proximate composition (water, ash, protein, and lipid) and energy content have been determined to assess the quality of 78 species, including jellyfish, crustaceans, cephalopods, cartilaginous fish, and bony fish. Results show broad variations between species, with energy densities ranging from 2 to 10 kJ g(-1). Lipids are the most structuring component and largely determined prey quality, and prey species are not necessarily interchangeable for the fulfilment of a predator's energy and food requirements. In ecosystem models, therefore, multispecies compartments of forage organisms would ideally be constituted using prey species of equivalent quality and hence of equivalent benefit to top predators.
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