Improved induction of meiotic gynogenesis in Coruh trout, Salmo coruhensis

In this study, water and spermatozoa parameters were evaluated during the reproduction season, as well as the optimal conditions for the retention of the second polar body in Salmo coruhensis eggs obtained with heat‐shock timing, intensity, duration and UV irradiation for gynogenetic production. Sperm was diluted 1:20 with lightly modified Hank's Balanced Salt Solution, and sperm manifesting 60% motility was obtained with a UV dose of 3600 kJ/cm2. The highest ratios of eyed‐stage, hatching and larval survival were 89.59 ± 2.18%, 82.86 ± 3.11% and 79.61 ± 1.25% in the experimental group exposed to 28.5 °C heat‐shock respectively. As the shocking temperature increased, the rates of eyed‐stage, hatching and larval survival decreased (p