The Impact
of Cod on the Dynamics of Barents Sea Shrimp (Pandalus borealis) as
Determined by Multispecies ModelsB. I. Berenboim, A. V. Dolgov, V. A. Korzhev, and N. A. Yaragina
Polar Research Institute of Marine Fisheries and Oceanography (PINRO)
6
Knipovich Street, Murmansk,Russia
Source - Journal of Northwest Atlantic Fishery Science, Volume 27: 69-75
ISSN-0250-6408
Over 50 years of research on Arcto-Norwegian cod feeding in the Barents Sea indicate that cod predation is one of the most important factors influencing northern shrimp (Pandalus borealis) population dynamics. In years when cod biomass is high the shrimp frequency of occurrence in cod stomachs declines. In addition, there is a significant inverse correlation between the abundance of cod and shrimp from 1982 to 1998. Analysis of the Russian-Norwegian cod stomach data base shows that cod at age 3-6 have the strongest impact on the Barents Sea shrimp stock and prefer to consume shrimp with a total length range of 5-10 cm. The established relationships are used in multispecies VPA and production models.
Language - English
Publisher - Northwest Atlantic Fisheries Oragnization (NAFO), Dartmouth, N.S., Canada
Publication Date - December 2000
Publication Type - Journal Article
Descriptors - Barents Sea, cod, feeding, shrimp