Feeding of Polar cod Boreogadus saida in the Kara Sea

Аннотация

In the summer–autumn period of 2007, 2010, and 2013, the peculiarities of Polar cod feeding Boreogadus saida in the Kara Sea were considered. In these years, the intensity of feeding of adult individuals was quite similar. Spatial and interannual differences in the composition of the food have been observed. Copepoda, Euphausiacea, and tunicates (Oikopleura sp.) dominated in the food of young fish. The main preys of adult individuals are Hyperiidea, Copepoda, Euphausiacea, and fish. As the length of Polar cod increases, the weight percentage of copepods decreases and the portion of fish increases.