The goal of the study was to investigate the effects of short term starvation periods and following re-feeding on common carp fingerling growth response. The carps were fed in four feeding schedules as follows for two weeks: by 75% (RL75), 50% (RL50) and 25% (RL25) of apparent satiation and one starved group (RL0).After that they were fed completely for six weeks. These groups were compared to a control group which was fed to the apparent satiation during the experiment. Fish subjected to the initial starvations displayed compensatory growth, and the higher growth rate (SGR) during the recovery phase was achieved by hyperphagia (daily food intake of the body weight). Also, there was a significant relationship (SGR%= 0.55x – 0.45, r2 = 0.93) between the daily feed intake and daily growth rate of the fish groups. After two weeks, hepatosomatic indices of the fasted groups were smaller than the controls, while there were no significant differences in the indices between-treatment variations after re-feeding periods. Results showed that the carp fingerlings subjected to short periods of fasting respond to short starvation by increasing growth rate followed by hyperphagia to compensate the weight loss, rather than improved feed efficiency and feed utilization.

In this research the effect of starvation on growth performance, insulin and blood serum metabolites were studied in order to assess compensatory growth mechanism in Persian sturgeon (Acipencer persicus) juveniles with average weight of 108.04± 0.28 gr (± SEM) in the same rearing condition during 8 weeks. This survey was designed in random with 5 treatments in 3 replicates which consist of control group (C, without fasting), 1w (1 week), 2w (2 weeks), 3w (3 weeks) and 4w (4weeks) starvation followed by 4 weeks of re-feeding in satiation. Results revealed that morphological factors including body weight, specific growth rate (SGR), condition factor (CF) and weight gainwere decreased significantly during starvation period.However, growth was increased after re-feedingand weight was compensated in different treatments.In addition, Blood plasma glucose and insulin during fasting and re-feedingdid not change significantly in comparison with the control group. This indicates high performance of this species in themaintenance of blood glucose during starvation and recovery of plasma glucose level after re-feeding. Whereas, plasma total lipid and triglyceride level in fasting treatments were increased. This showed a significant increase in 3w treatment that in 3w treatment(p<0.05), but after 4 weeks ofre-feeding their levels decreased in comparison with the starvationperiodwhich can be due to the energy- resource feature of lipids. The results also showed that Persian sturgeon juvenile can adapt with different long fasting periods and during fasting it can use glycogen and lipids reserves to overcome its metabolic requirements

Starvation periods of fish in during the developmental stages on growth indices and blood factors can be affected. The effects of compensatory growth on growth indices and physiological responses (glucose, total protein and cholesterol), study for 8 week investigated in Juveniles of common carp (Cyprinus carpio). The fish were divided in 4 experimental groups with initial weight (13/88±0/88 gr) in triplicate that included: 0 (T1) 2 days (T2), 4 days (T3) and a week (T4) starvation and refeeding periods each with 3 replicates were suffered. At the end of testing blood samples for biochemical analysis of each of the treatments used and metabolites were measured by spectrophotometry methode. Results showed growth indices including the final weight, growth rate, specific growth rate and body weight gain in the control and treatment 2 days a week of starvation were significantly different (p<0.05) but between treatments 1 day starvation and control there was no significant difference (p>0.05). The condition factor and feed conversion ratio in all treatments no significant difference (p>0.05). glucose levels between treatment starvation and control groups showed significant differences (p<0.05) but the total protein and cholesterol were not significantly different between control and starved treatments (p>0.05). The results suggest that commomcarp has the physiologic adjustment ability to short-term starvation and re-feeding period.