Differences in GSI, T, 11-KT and TUNEL staining intensities between
months were analyzed by using a Kruskal–Wallis ANOVA and the Dunn's
post hoc test with a significance level of α=0.05. To determine the
relationship between GSI, T and 11-KT with water temperature and
photoperiod, correlations and stepwise multiple regressions were used.