Qusay Hamid Al-Hamadany^*(1)

(1). Marine Science Center/Dept. Marine Vertebrate

(*Corresponding author: Qusay Hamid Al-Hamadany. E-mail: qusayhamid@yahoo.com

Received: 02/10/2018                                Accepted: 06/11/2018

Abstract

The current study aimed to study the effects of different levels of dry onions as additives to the diet of common carp fingerlings Cyprinus carpio L. on growth performance and food conversion rates. The initial average weight rate was 9.02±0.39 g. The results showed significant differences (p <0.05) in the final weight, daily weight gain, gain weight, relative growth rate, specific growth rate and food conversion ratio within fish groups. Treatment C, which fed on dry onion powder of 7% gave the best rate of final body weight, daily weight gain, gain weight, relative growth rate, specific growth rate and food conversion ratio. There were no differences (p >0.05) in the survival rate within fish groups. The results of the current study indicated that dry onion powder can be used in common carp fish at 7% to increase growth rates.

Key words: Cyprinus carpio, Dry onion powder, Growth rate, Food conversion.

Full paper in Arabic: PDF