Reproduction traits of brook trout (Salvelinus fontinalis) and effects of two different commerical feeds on the growth of fry

In this study, 7 female and 7 male rainbow trout broodstock were used. A total of 12.942 fertilized eggs were determined. Incubation period of eggs were 43 days with 92.73% hatching yield. After absorption of yolk sac, the fry with 0.34 g were fed with A and B brand name commercial feeds for 90 days. At the end of feding period, condition factors, tissue indexes of A and B groups were determined as 0.97±0.02; 1.01±0.01 and 11.32±0.44; 11.09±0.35 respectively. There were no significant differences (p>0.05) between the groups with respect to condition factors, hepatosomatic indexes and tissue indexes. Growth parameters such as specific growth rate, protein efficiency ratio and feed conversion ratio from A and B feeds were deterermined as 3.54±0.03; 3.53±0.01 - 2.05±0.04, 1.95±0.03 and 0.89±0.01, 0.93±0.01 respectively. There were no significant differences between groups considering all of these parameters (p>0.05). After a 90 day of feeding, mean live weights of the groups fed with A and B feeds were increased from 0.34 g to 9.87±0.96 g and from 0.34 g to 8.93±0.45 g respectively. There were no significant differences between A and B groups with respect to live weight increases (p>0.05). Mean hepatosomatic indexes of A and B groups were calculated as 1.54±0.28; 1,42±0.13 respectively. The difference between groups were statistically significant (p<0,05)