The effects of temperature on growth, survival, feed intake, body composition and blood parameters in Kutum (Rutilus frisii kutum kamenskii, 1901)

This trial was carried out for a period of 60 days to investigate the effect of temperature levels (24, 28 and 32ºC) on growth, survival, feed intake, blood parameters and body composition in Kutum (Rutilus frisii kutum) fingerlings (initial mean weight 0.2±0.03 g). The mean final weight of kutum fingerlings was 1.68±0.06 g. The highest daily growth rate (DGR), weight gain (WG), specific growth rate (SGR) and percentage of body weight gain (%BWG) were highest at 24ºC, and the lowest of these parameters were observed at 32ºC. In case of these parameters, no significant difference (P>0.05) was observed between 24ºC and 28ºC while this temperatures had significant difference (P<0.05) as compared to 32ºC. The fingerlings reared at 32ºC, showed the slower growth rate, lower feed intake, and higher FCR than other treatments. Mortality did not indicate significant difference (P>0/05) among different temperatures. The optimum food conversion ratio (FCR) of kutum fingerlings was obtained at 24 ºC. Condition factor (CF) and mortality rate, blood parameters, and body composition did not show significant difference among treatments (P>0/05). Glucose, cholesterol, total protein, Calcium, Magnesium, Sodium and Potassium had no significant variation among different treatments at the end of the experimental period (P>0/05). Hematocrit affected significantly by temperature (P<0.01). Results suggested that fingerlings of Kutum, reared excellently at temperature water among 24ºC to 32ºC.