Investigation of fecundity and development rate of Rainbow Trout (Oncorhynchus mykiss) broodstock in a
Makaleler > Tam Makale · 2002
Yazarlar: Güner, Yusuf, Tekinay, A. Adem
DergiPark (Istanbul University), Uluslararası, 2002
Özet
Investigation of fecundity and development rate of Rainbow Trout (Oncorhynchus mykiss) broodstock in a commercial farm in Ege Region.In this study, reproductive performance as survival of eggs and larvae, of rainbow trout broodstock (O.mykiss) in a commercial trout farm in Ege Region were investigated.Mean total and relative fecundity values were 2659±100.5egg/individual and 1708±44.2egg/kg, respectively.Fertilization rate on average was 91.87±1.55%.After fertilization, survival of the eyed eggs and hatching rate related to total fecundity were 86.02±1.91%and64.83±4.48%,respectively.Up to free swimming stage (to 16 th day) survival rate was 41.87±0.34%of the total fecundity and survival rate of fry from 16 th day to 120 th was 28.98±3.58%of the total fecundity.There was a positive relationship significantly between broodstock weights-total fecundity and egg diameter, also between total fecundity and egg diameter, while the relationship between broodstock weights and relative fecundity was significant but weak.Furthermore, there was a significant positive correlation between fertilization-eyeing, hatching and free swimming rates (p<0.05).Larvae reached mean weighing 2300±17.1 mg from 30 th day to 120 th day at mean 10°C.Our results show similarity with researches that have been done before.We conclude that trials should be done with broodstock selecting from breeding and at hatcheries which have free disease factors.