Correlation between Age and Fertility Indices of Rainbow Trout (Oncorhynchus mykiss) Females

COCAN, Daniel; MIREŞAN, Vioara; CONSTANTINESCU, Radu; RĂDUCU, Camelia; IHUŞ, Andrada
January 2013
Bulletin of the University of Agricultural Sciences & Veterinary;2013, Vol. 70 Issue 1, p199
Academic Journal
Because there are few salmonid farms in Romania where trout are artificially breed, is necessary for them to streamline their technological and economic activities, based on a selection-breeding program. Factors that influence the production and reproduction performance of rainbow trout are numerous, one of them being breeding age. Due to this, we aimed to identify the optimal age for use in breeding females of rainbow trout. For this, were randomized retained 20 rainbow trout females with 3, 4, 6, 8 and 10 years age old (20 from each category). They were weighed and measured, being analyzed the breeding performance, like ovary weight, the total number of eggs, egg diameter, egg volume, individual mass of eggs. The obtained data were used to calculate the reproduction indices: gonadosomatic ratio GSr, absolute individual index of fertility - Williams Waif, Behning-fertility coefficient Bfc. Between the values of these indices and the values of initial phenotypic characters analyzed, were calculated correlations. The results lead to the conclusion that, in practice, must be used rainbow trout females between the ages of 4 and 6 years.


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