Study Regarding the Conformation in Four Populations of Reproduction - Female - Rainbow Trout (Oncorhynchus Mykiss) From Trout Farm Fiad, County of Bistrita-Nasaud
Keywords:
rainbow trout, breeding, physiology of reproduction, different agesAbstract
Rainbow trout (Oncorhynchus mykiss) is the main specie exploited in the salmon complexes. The reason is the plasticity and resistance to changes in environmental and disease factors, and due to fast growth rate obtained by the processes of selection and improvement that specie has undergone. In order to achieve the highest production and appropriate quality, a special role has the breeders and their performance. In addition to environmental conditions and nutrition, very important features which contribute to achieving valuable production, are: breeding age, physiological state and morphological indices. In this context, the authors propose to characterize the four populations of breeding females, taking into consideration the following factors: age, body mass index and the main morphological traits. It was followed by dynamic growth and development of breeding females aged three, four, six or eight years. The results obtained, on the reproductive performance of rainbow trout (Oncorhynchus mykiss), may help the formation of competitive breeding groups in the context of increasing economic efficiency of trout in Romania. The experiment was conducted in Fiad trout farm, Bistrita-Nasaud County, in June 2009.
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