Tilapia oil, poultry offal oil and their combinations, replacing soybean oil, for tilapia fingerlings

Abstract

With the objective of evaluating the soybean oil replacement by tilapia oil and poultry oil for Nile tilapia fingerlings, 240 reversed tilapia fingerlings with an individual weight of approximately 0.6 ± 0.11 grams that were stored in 30 aquariums of 50 liters (6T x 5R), in the quantity of 8 units / aquarium, where they were fed with 65% lipid rations containing soybean oil (SO), tilapia oil (TO), poultry oil (PO), and their SO+TO, SO+PO, TO+PO mixtures of equal parts as a lipidic source in practical diets during 50 days. The performance parameters, the carcass composition and the fatty acids content both on the fillet and the innards were verified. The performance, survival, weight gain, and the feeding conversion characteristics were not influenced by the diet. The carcass composition on both the fillet and the innards were not influenced by the source of lipids in the content of moisture and lipids. In general, the fatty acids profile reflected the diets one with the decrease of polyunsaturated fatty acids and the increase of saturated and monounsaturated fatty acids with the replacement. Therefore, tilapia oil, poultry oil, as well as their mixtures can totally or partially replace the soybean oil in diets for Nile tilapia fingerlings without injury to the performance.