Aspects of growth in Arctic cod, Boreogadus saida (Lepechin 1773) |
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| Authors: | TOR JENSEN KARL INNE UGLAND MORTEN ANSTENSRUD |
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| Institution: | Institute of Biology, University of Oslo. P.O. Box 1074 Blindern, N-0316 Oslo 3, Norway |
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| Abstract: | In June 1986- 42 young Arctic cod were caught in ice-covered waters of the Barents sea with dip-nets by scuba divers. From August to June 1987 the fish were kept at -PC and fed on frozen shrimp ( Pandalus borealis ). Length and weight were measured monthly. A fast weight increment of about 0.7% per day was observed in the autumn (Sept.-Nov.). In the winter (Jan.-Feb), the growth rate declined to 0.05% per day. However, daily food intake only decreased by 50% during these winter months. Since the fish were exposed to constant illumination in the aquarium, this growth experiment indicates that something else than light has a significant influence on growth in Arctic cod. |
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