Growth performance and food conversion ratio of siberian sturgeon (Acipenser baeri Brandt) at different daily feding rates

Bu araştırmada farklı günlük yemleme oranlarının Sibirya mersin balığının (Acipenser baeri) büyüme ve yemden yararlanma performansı üzerine etkileri araştırılarak optimum günlük yemleme oranının saptanması amaçlanmıştır. Bu amaçla balıkların vücut ağırlıklarının % 0,75, % 1,00, % 1,25 ve % 1,50'si olmak üzere 4 farklı günlük yemleme oranının, ortalama başlangıç canlı ağırlıkları 1736 ± 37 g olan Sibirya mersin balıklarının spesifik büyüme oranı ile yem dönüşüm oranı üzerindeki etkileri araştırılmıştır. Deneme 19-22 $circ$C su sıcaklığında ve her biri 2'şer haftadan oluşan 4 periyot halinde "tekrarlanan ölçümlü Latin kare düzeni" içerisinde yürütülmüştür. Denemede yem olarak gökkuşağı alabalığı (Oncorhynchus mykiss) yemi kullanılmıştır. Ortalama spesifik büyüme oranı ve yem dönüşüm oranı bakımından yemleme grupları arasındaki fark, istatistik! olarak önemli (P < 0,05) bulunmuştur. Ortalama spesifik büyüme oranı, vücut ağırlıklarının % 0,75, % 1 ,00, % 1 ,25 ve % 1,50'si oranında yemlenen balıklarda sırasıyla % 0,47, 0,88, 0,89 ve 0,64 $gün^{-1}$ olarak saptanırken ortalama yem dönüşüm oranı sırasıyla 1,71, 1 ,25, 1,40 ve 2,43 olarak bulunmuştur. Bu değerler ışığında 19-22 $circ$C su sıcaklığında ortalama ağırlıkları 1736 olan Sibirya mersin balıkları için optimum günlük yemleme oranının vücut ağırlığının % 1 ,00'i olduğu saptanmıştır.

Farklı günlük yemleme oranlarında sibirya mersin balığının (Acipenser baeri Brandt) büyüme performansı ve yem dönüşüm oranı

The effects of different daily feeding rates on the specific growth rate and food conversion ratio of Siberian sturgeon (Acipenser baeri) were investigated in order to determine the optimum daily feeding rate for fish with an initial mean weight of 1736 ± 37 g. To this end, a Latin Square experimental set-up was designed consisting of four groups of 25 fish fed a rainbow trout diet at four different daily feeding rates (0.75, 1.00, 1.25 and 1.50% body weight/day) for four 2-week periods. Water temperature varied between 19 and 22 $circ$C throughout the experiment. Mean specific growth rate and food conversion ratio values were found to be significantly different (P < 0.05) between the four treatments. The means of specific growth rate and food conversion ratio for fish fed at 0.75%, 1.00%, 1.25% and 1.50% body weight/day were computed as 0.47, 0.88, 0.89 and 0.64% $day^{-1}$ and 1.71, 1.25, 1.40 and 2.43, respectively. At 19-22 $circ$C the optimum daily feeding rate for Siberian sturgeon of 1736 g was determined to be 1.00% body weight/day.

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