The effects of two different feeds on the egg production and egg quality of rainbow trout (Oncorhynchus mykiss)

Abstract

In this study, there were two groups of fishes which fed as dry feed and semimoist feed ones. The average body weights of the groups were 310.009.03 g. and 320.507,20 g. respectively.To investigate the effects of different feed groups (dry and semimoist) on the egg productıon (absolute and relative fecundity) and egg quality (Fertilazition rate, hatching yield, brooding yield, the survival rates “in larval stage” and eggs diameter), Rainbow trouts have been fed adlibitum with dry and semimoist feed for six months before spawning time. At the end of the study the live weights of the semimoist and pellet feed groups were 681.2516.63 g. and 577.50 35.67 g. respectively.The absolute and relative eggs fecundity for the semimoist feed groups were 1954.2575.79 and 2848.5094.026 per kg and for the pellet group were 1521.25 110.61 and 2632.50101.660 per kg respectively. The semimoist feed groups was found as the best one interms of absolute eggs fecundity. Fertilization rate of eggs, hatching yield, brooding yield and survival rate of fry at the end of fry period for wet feed group were calculated 98.98 0.13%, 85.301.65%, 84.291.50%, and 95.481.85% respectively. These values for dry (pellet) feed group were observed as 97.920.71%, 77.435.43%, 75.245.24%, and 98.520.37% respectively. Egg diameters for semimoist feed group were found 4.400.04 mm. and in dry (pellet) feed group 4.260.09 mm. When the brood weights were compared with absolute fecundity (r=0.90) and egg size (r=0.90), a positive relationship between was seen

Keywords

• Rainbow trout, egg production, egg quality, Oncorhynchus mykiss

Farklı Yemlerin Damızlık Gökkuşağı Alabalığının (Oncorhynchus mykiss) Yumurta Verimi ve Yumurta Kalitesine Etkileri

Abstract

Bu araştırmada, yarı yaş yem grubu için balık ağırlığı ortalama 320.507.20 g., pelet yem grubu için ise 310.009.03 g., olan gökkuşağı damızlıklarına yarı yaş yem (Mezbaha yan ürünleri) ve kuru (pelet) yem altı ay boyunca doyuncaya kadar yem verilmiş olup, farklı yemlerin yumurta üretimine (mutlak ve nispi yumurta verimi) ve yumurta kalitesi (Döllenme oranı, çıkış gücü, kuluçka randımanı, keseli dönemde yaşama gücü ve yumurta çapı) üzerine etkileri incelenmiştir. Deneme sonunda pelet ve yarı yaş yem verilen gruplardan sırasıyla 577.5035.67 g. ve 681.2516.63 g. ortalama canlı ağırlıklar elde edilmiştir. Mutlak yumurta verimliliği ortalama olarak yarı yaş yem grubu için 1954.2575.79 adet ve pelet yem grubu için ise 1521.25110.61 adet yumurta tespit edilmiş olup elde edilen bulgular arasında istatistiki fark mutlak verimlilikte önemli bulunmuştur (P

Keywords

• Gökkuşağı Alabalığı, yumurta üretimi, yumurta kalitesi, Oncorhynchus mykiss