The Use of Nauplii and Decapsulated Cysts of Artemia parthenogentica in Common Carp Cyprinus carpio in Comparable with Liqure Artificial Diet

Abstract

The aim of this study was used nauplii and decapsulated cysts of Artemia parthenogentica in Common Carp Cyprinus carpio in Comparison with Liqure Artificial Diet for feeding of common carp. Four various feeds (Treatments) with 2 replicates were supplied to common carp larvae for 30 days at a daily rate of 3 times. Treatments were: T1- Laboratorial artemia nauplii, T2-Decapsulated unhitching Iraqi artemia cysts by using diluted commercial bleach, T3- mixture of liquor artificial diet and decapsulated artemia cysts and T4-liqure artificial diet only. Fish larvae randomly, were distributed into 8 glass aquaria at a 50 larvae (Biomass 0.1 gm) per aquarium. Survival rate, larvae weight (Biomass) and growth rate were determined biweekly and after 30 days. Fish larvae of T2 showed the highest survival rate (96%) after 15 days of experiment, comparably with larvae of T3 (91%), whereas T1 and T4 larvae showed 82% and 80% respectively but no significant differences, were cysted the highest growth rate was 4.050 gm in T2 and the lowest was 1.0 gm in T4 . Simultaneously ,after 30 days of feeding treial ,T1 fish larvae showed the highest survival rate (84%) ,which the highest growth rate occurred in T3 larvae(7.14gm). whereas occurred highest food conversion efficiency showed in T2 (11.953%) and the lowest was 2.84% in T4.These results declare that the mixture of liquor artificial diet and live food can enhance the growth and acceptability of artificial diet by fish larvae because of the presence of digestible enzymes in decapsulated cysts of artemia.