Reviews in Fish Biology and Fisheries 8, 101±104 (1998) Points of view A framework for multispecies modelling of Arcto-boreal systems Â Â Â GUNNAR STEFA NSS O N and O LAFUR K . PA LSSON Marine Research Institute, Reykjavõ Âk, Iceland Keywords: multispecies modelling, ®sheries, Arcto-boreal ecosystem The marine ecosystems off Labrador and Newfoundland, east and west Greenland, Iceland and that of the Barents Sea will be termed Arcto-boreal systems in the following. In terms of environmental conditions, these ecosystems are characterized by large annual and seasonal ¯uctuations, in physical parameters such as temperature and nutrients, as well as in biological conditions such as primary and secondary production. Such ¯uctuations may give rise to biological variability in higher trophic levels in recruitment, growth rates, stock sizes and yields. Typically, such an Arcto-boreal system includes Atlantic cod (Gadus morhua, Gadidae) as a major ®sh predator with capelin ( Mallotus villosus, Osmeridae) and shrimp ( Pandalus borealis) as its main prey. Also typically, several components of the ecosystems are harvested, including both prey and predator species. Apex predators include several whale and seal species as well as seabirds, and in some cases it may be important to take these into account.
Reviews in Fish Biology and Fisheries – Springer Journals
Published: Oct 6, 2004
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