Kapal› Yetifltirilmifl Erzurum ve Silifke Gökkufla¤› Alabal›¤›n›n (Oncorhynchus mykiss) Saf ve Resiprokal Melezlerinin Kuluçka ve Keseli Dönemleri Üzerine Bir Araflt›rma

Our aim was to investigate the survival rate at the hatching and yolk sac stage of close-rearing and crossbred rainbow trout population (Erzurum female X Erzurum male - Eƒ x E﷿; Erzurum female X Silifke male - Eƒ x S﷿; Silifke female X Silifke male - Sƒ x S﷿; Silifke female X Erzurum male - Sƒ x E﷿). A total of 32,976 eggs were incubated, 29,012 of which hatched. The survival rate of the larvae was 88%. The insemination rate, brooding yield and hatching rate of Eƒ x E﷿, Eƒ x S﷿, Sƒ x S﷿ and Sƒ x E﷿ were 97.33 - 0.57, 97.66 - 0.57, 97.33 - 0.57 and 97.33 - 0.57; 93.43 - 1.81, 93.40 - 1.85, 72.00 - 33.80, 88.00 - 9.64, and 95.47 - 2.052, 94.73 - 2.65, 73.80 - 34.66, and 90.17 - 9.71%, respectively. Although the differences among all determined averages were not significant, the hatching yield was 20% lower for the Sƒ x S﷿ group.