Effect of Stress Conditions on Body Composition Parameters of Farmed Rohu (Labeo rohita)

摘要

Various stressors affect the body composition of fish. The current study was undertaken to investigate the effect of stress conditions on the body composition of farmed Labeo rohita. Sixty fingerlings were subjected to experimentation in aquaria after being acclimatized. The specimens were divided into control, starvation stress and double stress (pH 8 and starvation) groups with 20 individuals in each group. Fish samples for the estimation of body composition were taken after 12 days, 24 days, 36 days and 48 days. Standard procedures and protocols were used for analysis. There was a trend of gradual increase in ash contents (% dry body weight) in starvation and double stress group with increase in number of days. However, fat contents (% dry body weight) considerably decreased and protein contents remained unchanged. The inter-comparison of three groups showed that there was significant effect of starvation and double stress on water contents (%) after 36 days; on ash contents (% dry body weight) after 12 days, 24 days, 36 days and 48 days; on fat content (% dry body weight) after 12 days and 24 days; and on protein contents (% dry body weight) after 24 days. The lipids were the major constituents of Labeo rohita that responded to starvation being main energy source for fish.