Aspects of growth in Arctic cod, Boreogadus saida (Lepechin 1773)

• Published in: Polar Research
• Main Authors: Jensen, Tor, Inne Ugland, Karl, Anstensrud, Morten
• Format: Article in Journal/Newspaper
• Language: English
• Published: Norwegian Polar Institute 1991
• Subjects: Arctic; Barents Sea; Arctic cod; Boreogadus saida; Pandalus borealis; Polar Research; ice covered waters
• Online Access: https://polarresearch.net/index.php/polar/article/view/2336; https://doi.org/10.3402/polar.v10i2.6765

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.