On the growth and food of 0-group coalfish,Pollachius virens(L.), in Norwegian waters

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Abstract
Coalfish, Pollachiu3 virens (L.), of the 0-group have been collected in North- and West-Norwegian waters for a study of growth and food. The growth rate was higher in western Norway than in northern Norway, but no decrease in the growth rate with increasing latitude was found for 0-group coalfish from the stations in northern Norway. Measurements from the Sunnhordland-Hardanger area indicated a higher growth rate in the inner part of the area. A diurnal variation in the mean length of 0-group coalfish occurred in catches from Håkonsund near Bergen. The degree of fullness of the stomachs has been estimated. Copepods were the main food item, with Harpacticoida dominating at the northernmost stations, Calanoida at the others. In Håkonsund the number of larger food organisms was increasing throughout the autumn. The abundance of the different species in the stomach contents is discussed.

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