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Turkish Journal of Fisheries and Aquatic Sciences 2020, Vol 20, Num, 6     (Pages: 499-505)

Short Term Ration Restriction and Re-Alimentation: Effect on Compensatory Growth, Body Composition and Insulin Like Growth Factor Gene Expression in Cyprinus carpio

Sanjit Debbarma 1 ,V. K. Tiwari 1 ,A.K. Reddy 1 ,A. Pavan Kumar 1 ,Babitha Rani A.M 1

1 Central Institute of Fisheries Education, Off Yari Road, Panch Marg, Versova, Andheri (W), Mumbai-400061 DOI : 10.4194/1303-2712-v20_6_08 Viewed : 2484 - Downloaded : 2555 Advanced fry of Cyprinus carpio (mean weight 1.73±0.02g) were fed at 10%, 25%, 50% and 75% of satiation as different treatment groups and one control group (6 weeks) for first phase (restriction feeding) and a second phase (8 weeks) of satiation feeding for all the treatments. At the end of first phase, there was significant difference in mean weight among the treatment groups (P<0.05) but, after second phase (8 weeks), treatment group fed at 75% of satiation obtained significantly higher body weight than control, while 50% satiation fed group obtained similar weight as of control. FCR was found to be better at moderately restricted fed group (50% and 75% satiation). Crude protein and crude lipid content decreased in severely restricted groups (10% and 25% of satiation fed), compared to others after 14 weeks. IGF-I and IGF-2a gene expression in the liver was observed as down regulated during ration restriction and up regulated after re alimentation. However, after re-alimentation for 8 weeks, IGF-2a gene expression was recorded to be increasing and was higher than control. The study concludes that moderate levels of ration restriction (50% to 75% of satiation levels) is sufficient for effective growth and feed utilization. Keywords : Cyprinus carpio, Body Weight, Body Composition, IGF-I and IGF2a Gene Expression