| Summary: | 碩士 === 國立屏東科技大學 === 熱帶農業暨國際合作系 === 105 === The objective of this research was to evaluate effects of dietary pineapple enzyme supplemented on growth, body composition and biochemical parameters of Nile tilapia (Oreochromis niloticus × Oreochromis aureus). The feed contained 52.73% soybean meal and 8% fish meal with or without 1% pineapple enzyme supplementation were used as experimental and control diets, respectively. The diet containing fish meal as the main protein source was used as a reference diet. Three experimental diets were each fed to triplicate groups of tilapia (initial body weight: 26.20 g) in a recirculating system for 6 weeks. Fish that were fed with whole fishmeal (reference diet) had a higher (p<0.05) weight gain, feed intake, feed efficiency, protein efficiency ratio, condition factor and hepatosomatic index than compared to the fish that were fed the diets containing soybean meal and 1% of pineapple enzyme. There was no significant difference between hepatic thiobarbituric acid reactive substances among all dietary treatments. The present study indicated that the growth performance of tilapia were depressed while the fish fed diets with soybean meal substituting to fish meal. Supplementation of 1% pineapple enzyme did not improve the negative effects on growth.
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