Distribution and growth of capelin in the Barents Sea in relation to water temperature in the period 1974 to 1983

Abstract

The variation in the distribution of the different age-groups of capelin in the Barents Sea were studied in relation to temperature variation in the period 1974 to 1983. In addition, growth of the capelin were compared to the temperature data for the years 1977 to 1983. The data were collected on yearly cruises in September-October. During the period 1976 to 1980 pronounced south- and westward displacement of all capelin age-groups was observed. The displacement coincided with decreasing water temperature in the region. It was found that the older age-groups, 2, 3 and 4 year old fish, inhabited significantly warmer water masses in the years 1980 to 1983 than previously. Growth, especi lly for the two year olds, changed correspondingly, as it was higher in 1980 to 1983 than previously in the studied period.