The Growth Performance, Feed Efficiency and Body Composition of Juvenile Nile Tilapia (Oreochromis niloticus) feed by Caterpillars (Imbrasia truncate Aurivillius, 1908) Meal in Replacement of Fish Meal
*Ngalya Benge Nathalie Department Of Animal Science, Institute Of Agronomic Sciences Of Yangambi, Congo
*Corresponding Author: Ngalya Benge Nathalie
Department Of Animal Science, Institute Of Agronomic Sciences Of Yangambi, Congo Email:email@example.com
Published on: 2019-05-02
Effects of caterpillar (Imbrasia truncate Aurivillius, 1908) meal as a protein source in the diet of Oreochromis niloticus were investigated on growth performance, feed efficiency, whole body mineral composition and the cost/benefit analysis. The experiment was conducted in a completely randomized design with duplicate observations (3 treatments × 2 replicates × 35 fish per hapa-in-earthen pond systems) during ten weeks of duration using an open system. Water temperature and dissolved oxygen ranged respectively between 27.7 to 28° C and 4.5 to 6.0 mg l-1. The Nile tilapia (12.67 ± 1.88 g initial body weight and 10.45 ± 0.03 cm initial length) were fed three times a day with three calculated isonitrogenous and isoenergetic diets prepared by replacing fishmeal with caterpillar meal at 15% and 30%. The diets were coded T1 and T2 respectively. A control diet without caterpillar meal was coded T0. The fish fed with T1 and T0 diets were superior in specific growth rate (p<0.05) when compared with fish fed with diet T2 treatment. On the other hand, the feed utilization parameter: feed conversion ratio (FCR), did not show significant differences (p?0.05) between the fish in the control group and diet T1, although a significant difference between T1 andT2 treatments was observed.
Growth; Feed efficiency; Body composition; Oreochromis niloticus; Caterpillar meal
Due to the increase in world population there is need for high production of fish to supplement the catch from the wild. Meanwhile under intensive and semi-intensive aquaculture regimes, feed constitutes the largest proportion of the overall costs, often ranging from 30% to 60% of the total variable expenses, depending on the intensity of the culture operation.Therefore, the success of commercial aquaculture operations depends mainly on the availability of suitable diets, which provide required nutrients for optimum growth at minimal cost. High-quality fish meals constitute the major fraction of the protein supplied in commercial fish feeds. For this reason, fishmeal and fish oil prices have been increasing as their availability has been decreasing. Consequently, that has stimulated research interest to seek alternative protein source for feeds in aquaculture. The utilization of non-conventional protein supplements of both animal and plants origin in aquaculture has been the focal point of research in the world in recent times.