Effects of alternative dietary lipid sources (soy-acid oil and yellow grease) on growth and hepatic lipidosis of common carp (Cyprinus carpio) fingerling: a preliminary study.

摘要

A 60-day feeding trial was conducted to determine the effect of increasing the dietary lipid (alternative lipid source: soya-acid oil, SAO and yellow grease, YG) levels on the growth performance, body composition and liver morphology of common carp. Seven isonitrogenous practical diets were formulated to contain 4, 8.5, 13 and 18% SAO and 4, 8.5 and 13% YG. The control diet was not supplemented with the dietary oil. The fish fed with the diet containing 8.5% YG had the highest weight gain and was similar to the control group in feed conversion, daily feed intake and protein and energy consumption. No improvement in growth was observed in SAO-fed groups. Moreover, liver lipid degeneration (steatosis) was observed in fish fed with the highest dietary lipid. The preliminary results indicated that common carp did not efficiently utilize SAO and YG as alternative dietary lipid sources..