In this study, effect of varying dietary oils on growth, nutrient utilization and body composition of juvenile black fin sea bream Acanthopagrus berda was investigated. Fish juvenile (10.1±0.5 g) were collected from Sonari Channel, Hawksbay, Karachi and were brought to aquaculture laboratory of the Centre for 15 days acclimatization. After acclimatization, they were randomly distributed into the rectangular tanks (3 × 1.5 ×1.5 ft each). In each tank, 10 fish were stocked with three replications for each treatment. Four isonitrogenous diets containing different oils i.e., fish oil (FO), soybean oil (SO), olive oil (OO) and palm oil (PO) were given to the juveniles for 60 days. Best specific growth rate (SGR) and feed conversion ratio (FCR) were noted in the fish fed diet containing FO. Fish fed diet comprising OO and PO showed poor SGR and FCR values than those fed with FO and SO diets. Body composition was not significantly influenced by different lipid sources although low crude lipid was found in fish fed diet containing FO. The hepatosomatic index (HSI) and visrosomatic index (VSI) were greater in the fish fed FO diet than the remaining diets. Finally, it was concluded that fish oil is the best source of energy in fish diet followed by soybean oil for A. berda growing from 10.1 g and 69.2 g. Further study is required for optimization of fish oil level and replacement of FO with vegetative oils.
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