|Multispecies versus single-species assessment of North Sea Fish Stocks|
Daan, N. (1987). Multispecies versus single-species assessment of North Sea Fish Stocks. Can. J. Fish. Aquat. Sci. 44(suppl. 2): 360-370
In: Canadian Journal of Fisheries and Aquatic Sciences = Journal canadien des sciences halieutiques et aquatiques. National Research Council Canada: Ottawa. ISSN 0706-652X, more
Development of multispecies virtual population analysis (MSVPA), which assesses interspecific and intraspecific predation through an analysis of stomach contents, has verified the hypothesis that predation among exploited fish species contributes significantly to their natural mortality and that predation, and thus natural mortality, is inherently variable from year to year. In single-species virtual population analysis (SSVPA), natural mortality is assumed to be constant. MSVPA also suggests that natural mortality among Young fish after recruitment is much higher than previously thought. The method has considerable implications for management.