Kahverengi Alabalık (Salmo trutta sp., L., 1766) Anaçlarının Döl Verim Özellikleri ve Kaynak Suyundaki Yumurta Verimliliği

Abstract

This study was conducted to determine reproductive efficiency and fecundity in spring water of brown trout broodstocks (Salmo trutta, L.1766) that is an alternative species for aquaculturist in inland waters of Turkiye.In this experiment, average weight of 1251.35±58.21 g, average length of 48.12±0.94 cm and 2+
years old female brown trout and average weight of 1341.56±41.19 g, average length of 48.89±0.51 cm and 2+years old male brown trout were used.In this study total fecundity, relative fecundity, mean egg diameter, mean sperm volume were 1757±85 egg/individual, 1432±34 egg/kg,0.53±0.03 cm and 19.64±1.34 ml/individual. Respectively mean water temperature, dissolved oxygen and pH were 12.48±0.19°C, 4.54±0.33 mg/lt and 7.42±0.01. Fertilization rate and eyed rate of eggs were found as 96.53%, 73.73%. While eyed time of eggs was 250 degree-days.There were significant positive relationships between fish weight gonad weight, fish weight-total fecundity, fish length-gonad weight and fish length-fecundity. While there were negative but not significant relationships between fish weight-relative fecundity and fish length-relative fecundity.