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Vol. 17 (2014 year), No. 1

E.M. Zubova, N.A. Kashulin
Scale morphology and growth of whitefish Coregonus lavaretus (Coregonidae) of the Yokostrovskaya Imandra

The paper considers age-length features of scale morphology of whitefish Coregonus lavaretus L. captured in the Yokostrovskaya Imandra – an arctic lake, heavily polluted by industrial and domestic sewages. The irregularity of relative growth of different scale sectors throughout the life of the fish at constant scale form has been shown. The anterior diagonal radius of the scale and use of the regression method have been recommended for back calculations of fish body length. The highest growth rate is typical for the first year of whitefish life, then there is some decline in values of average annual growth and the specific growth rate of fish. The impact of the whitefish puberty onset on its rate growth has been described.

(in Russian, стр.14, fig. 8, tables. 8, ref 45, Adobe PDF, Adobe PDF 0 Kb)