Influence of olive leaves additive on growth and physiological parameters of Sarotherodon galilaeus | ||
| Egyptian Journal of Aquatic Biology and Fisheries | ||
| Article 61, Volume 25, Issue 4, July and August 2021, Pages 967-979 PDF (452.96 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejabf.2021.196335 | ||
| Author | ||
| Raky F. Attalla et al. | ||
| Abstract | ||
| A 100- day study was conducted to evaluate the effect of dried olive leaves on the growth rates, biochemical parameters, and physiological activities of the tilapia (Sarotherodon galilaeus), with an initial body weight 33 ± 1.0g reared in a concrete pond. Test fish fed three diets, 30 % crude protein (CP) and 3000 kcl containing 1, 2, and 3% olive additive, besides the control (0% additive). Optimum results of growth parameters, total weight gain, and specific growth rate (TWG and SGR) were recorded for fish-fed diets with 2 and 3% olive leaves. The best ratios of feed conversion (FCR) and protein efficiency (PER) were recorded with values of 1.86±0.11 & 2.0±0.42, respectively, for fish fed on the treated diet (3). Results indicated that diet containing olive leaves were palatable with optimal digestive rate. The protein content of body fish increased significantly through all the treated diets compared to that of the control. Olive additive improved plasma total protein, albumin, and globulin levels, accompanied with optimal promising findings of plasma aminotransferases (AST and ALT) activities. In addition, a significant reduction in plasma glucose, cholesterol, and triglycerides levels were detected for the three test fish-fed olive supplemented diets. In conclusion, olive leaves could improve the growth and physiological parameters in cultured Sarotherodon galilaeus. | ||
| Keywords | ||
| Sarotherodon galilaeus; Growth; Physiological activities; Olive leaves | ||
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