علوم زیستی دریا
Jasem Ghafleh Marammazi; Mojtaba Zabayeh Najafabadi; Esmaeil Pagheh; M Hafezieh
Abstract
This study has been carried out to evaluate the effect of varying dietary levels of protein (45%, 50%, 55% and 60%) and energy (20, 22 and 24 kjg-1) on growth, survival rate, food performance and body chemical composition of sobaity Juvenile. 36 polyethylene of 300 Lit volume container equipped with ...
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This study has been carried out to evaluate the effect of varying dietary levels of protein (45%, 50%, 55% and 60%) and energy (20, 22 and 24 kjg-1) on growth, survival rate, food performance and body chemical composition of sobaity Juvenile. 36 polyethylene of 300 Lit volume container equipped with flow-through water system (with 1 Lit/min water exchange) have been provided and each stocked with 18 Juvenile fishes (27.99 ± 0.14 g weight). During the rearing period biometric measurement was carried out once fortnightly. After 56 days of rearing period, results showed significant affect of treatments and varying levels of protein and energy on the growth and food performance, survival rate and body composition )P ≤ 0.05) of the fish, but the effect of dietary protein was not significant on the FCR, PER, fat and body crude fiber (P > 0.05). Also the effect of dietary energy was not significantly effective (P> 0.05 ) on the growth and food performances, but was significantly effective on the survival rate and body composition )P ≤ 0.05) of the fish. Results also showed the highest growth of fish in diet with 60% CP and 24 kJg-1 energy, highest survival rate in diet with 55% CP and 22kJg-1 energy and best FCR and PER in diet with 50% CP and 24 kJg-1 energy. According to the results of the present, 50% CP and 22 kJg-1 energy are recommendable to cover the dietary protein and energy requirement of sobaity fish in the Juvenile stage.