What is The Problem on Reproductive Performance? An Assessment on Quality Parameters and Fatty Acids Profile in Eggs in Rainbow Trout and Brown Trout


Özgür M. E. , Uğur Y. , Dağlı M., Erdoğan S. , Bayır İ.

HydroMedit 2014, 1st International Congress of Applied Ichthyology & Aquatic Environment, Volos, Yunanistan, 13 - 15 Kasım 2014, ss.477-483

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: Volos
  • Basıldığı Ülke: Yunanistan
  • Sayfa Sayıları: ss.477-483

Özet

This study was carried out some egg quality parameters and the fatty acids contents of unfertilized eggs in Rainbow trout (Oncorhynchus mykiss) and Brown trout (Salmo trutta fario). Some of the contents of saturated, monounsaturated and polyunsaturated fatty acids were measured and evaluated between Rainbow trout and Brown trout. Total saturated and monounsaturated acids in eggs of Oncorhynchus mykiss occurred in higher quantities than Salmo trutta fario. Miristic acid, palmitic acid and stearic acid were main saturated fatty acids, palmiteloic acid and oleic acid were main monounsaturated fatty acids and linoleic acid, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) were main polyunsaturated fatty acids of eggs. The concentrations of saturated fatty acids (palmitic and pentadecanoic acids), and polyunsaturated fatty acids (nervonic acid) were significantly different (p<0.05) between fish species. Especially, the concentrations of EPA and DHA in unfertilized eggs of both fish species determined no significant different (p>0.05). In the study, egg diameter 5.58±0.18 mm, relative eggs production per kg 771.31±88.07, absolute egg production per individual 2891.13±339.41, hatching ratio during incubation period 69.43±6.10 % of broodstocks of Rainbow trout (Oncorhynchus mykiss) was determined. In Brown trout (Salmo trutta fario), 4.31±0.12 mm, 558.05±56.71, 1533.11±157.51 and 52.17±7.06% was determined, respectively. From egg quality parameters and fatty acid contents, point of view, it was determined that the values were not within the limits of the purpose in which this study was built.