Bir Alabalık İşletmesindeki Gökkuşağı Alabalığı Damızlıklarının Üretim Performansı Üzerine Bir Çalışma

Özet

This study carried out reproduction performance about broodstocks of rainbow trout in a fish farm. In the study, egg
diameter 5.58±0.18 mm, relative eggs production per kg 1607.25±84.55, absolute egg production per individual
6024.66±357.97 of broodstocks of Rainbow trout (Oncorhynchus mykiss) was determined. After eggs collection, the ratios
of fertilization, eye formation and hatching during incubation period were 98.84±2.04 %, 97.14±5.08 % and 79.36±12.43
%, respectively. Twenty-three days after yolk-sac larvae stage, yolk-sac sack is exhausted and free swimming begins,
leading to feeding stage. Yolk-sac larvae term survival ratio at this stage and fry survival ratio were determined to be
99.49±0.26 %, 85.51±22.31, respectively. Quality of sperm examined about pH (7.35 ±0.21) and volume (40.41±21.60 ml
of sperm, density (10.43±2.06 x 109spermatozoa/ml) and motility (86.50±5.45 %) of spermatozoa.
There was significant positive relationships between broodstocks weight and absolute eggs production, relative eggs
production and egg diameter (Adjusted R2=0.99; P<0.05). From egg quality parameters point of view, it was determined
that, the values obtained were within the limits of the purpose in which this study was built.