Fecundity of vendace from two lakes of Mazurian Lake district

Abstract

Gonads of vendace were collected in 1983 and 1984 in two Mazurian lakes. Significant correlations between absolute fecundity and body fecundity and body size (weight and length) were observed. Body length, weight, growth rate and fecundity varied between spawning populations and so did the spawning time and maturation rate of gonads.