Effect of phospholipid supplements to fishmeal replacements on growth performance, feed utilization and fatty acid composition of mud crab, Scylla paramamosain (Estampador 1949)
2017
Ambok Bolong Abol-Munafi | Mhd Ikhwanuddin | Mazlan Abd Ghaffar | Mohd Azmi Ambak | Md. Abdul Kader | Md. Eaqub Ali | Noordiyana Mat Noordin | Mahbuba Bulbul | Md. Asaduzzaman
Mud crab, Scylla sp. aquaculture has gained in popularity due to diminishing wild stocks and high market demand. However, the industry is facing a shortage in quality formulated feed and research on practical feed development remains scarce. We conducted a 2×2 factorial experiment to examine the interactive effects of different levels of fishmeal (FM) and supplementation of dietary phospholipid (PL) on fatty acid composition, carcass composition, feed utilization and growth performance of juvenile mud crab, S. paramamosain. Four isonitrogenous experimental diets were prepared by the addition of two levels of FM at 50.0% (Diet 1) and 16.5% (Diet 2); these represented no replacements and two third of the FM protein replaced with fish bone meal,respectively. Two other experimental diets were formulated by supplementing 4% dietary PL to the previous diets and designated as Diet 3 and Diet 4, respectively. Triplicate groups of ten juveniles were fed the experimental diets for 60 days. Findings of the present study indicated that growth performance, feed utilization and body composition of mud crab except for survival were not significantly affected by the addition of different levels of FM. However, growth performance of mud crab significantly (P<0.05) improved with the inclusion of PL. No interactions were found between FM and PL for any of the analyzed parameters. Mud crab fed the experimental Diet 4 showed significantly higher growth performances. Similarly, feed intake, protein efficiency ratio, whole body crude protein and lipid were also highest(P<0.05) in this group. Whole body fatty acid composition showed that replacement of FM significantly decreased ecosapentanoic acid, while total polyunsaturated fatty acid was not affected. However, supplementation of PL significantly increased total polyunsaturated fatty acid. The present study concluded that two third of the FM could be replaced with fish bone meal from mud crab diets. Supplementation of 4% PL could significantly improve the carcass composition, feed utilization and growth performance of mud crab.
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