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Short term starvation and re-feeding in Nile tilapia (Oreochromis niloticus, Linnaeus 1758): Growth measurements, and immune responses

2019; Elsevier BV; Volume: 16; Linguagem: Inglês

10.1016/j.aqrep.2019.100261

2352-5134

Michael Essien Sakyi, Jia Cai, Jufen Tang, Liqun Xia, Pengfei Li, Emmanuel Delwin Abarike, K. Felix, Jichang Jian,

Physiological and biochemical adaptations

The effects of short term starvation and re-feeding to satiation on compensatory growth performance, haematological parameters, biochemical parameters, and immune responses were investigated in Oreochromis niloticus of average weights 96.10 ± 0.47 g and 96.44 ± 0.49 g for feeding group and starvation group respectively under the same rearing condition within 21 days period. The fish were divided into two groups namely control group (continuous feeding/ feeding group) and starvation group (days; 0, 3, 7, 10, 14, 21) and re-feeding was done immediately after starvation (days 7, 14, 21). The changes in growth performance, haematological indices, biochemical parameters, and immune responses of the fish were examined (days; 0, 3, 7, 10, 14, 21) and during re-feeding of the fish (days; 7, 14, 21). The results of the growth measurements decreased significantly during starvation and recover significantly after re-feeding (P < 0.05). The re-feeding group indicated a compensatory growth. Haematological indices such as WBCs, Hgb, Hct, and RBCs increased significantly (P < 0.05) after 14 days of starvation while re-feeding group decreases significantly within the successive times (P < 0.05). In the starvation group, blood glucfundose decreases significantly while the re-feeding group increases significantly within successive times (P < 0.05). The levels of Lactate dehydrogenase (LDH) and Pyruvate kinase (PK) increased significantly in the starvation group while the re-feeding group was maintained significantly within successive times. In the serum and liver, the levels of antioxidant enzymes activities in the starvation group were increased significantly while the re-feeding varied significantly within successive times. The immunological responses including lysozyme, immunoglobulin, and antiproteases increased significantly after 21 days of starvation but decrease significantly in the re-feeding group. The protease and lipase in the starvation group decrease significantly during starvation but increase after 21 days of re-feeding. These findings showed that short term starvation had significant effects on growth performance, haematological and biochemical parameters, and immunological parameters in Nile tilapia and recover positively after re-feeding. Taken together, the present findings provide new sight into the beneficial role of short term starvation and re-feeding in fish.