The Reproduction Traits of Native Brown Trout (Salmo trutta macrostigma T., 1954), Turkey

Some key aspects of the reproductive strategy of the brown trout Salmo trutta macrostigma (T., 1954) inhabiting Uzungol stream, Trabzon including spawning season, age at sexual maturity, fecundity and egg size have been studied between January 2009 to May 2010. The ages of the captured fish ranged from 2-8 years. Individuals were composed of 40.85% males and 37.80% females. The present investigation on the fecundity of S.t. macrostigma was carried out to estimate the average and range in the number of ova laid by individual female as well as to study the relationship of the fecundity with total length, total body weight. The mean value of absolute fecundity was 312.23 +/- 254.71 (SD) eggs/female. The regression between egg number and fish size (total length and weight) was statistically significant (p<0.05).