Effect of Water Temperature on Growth Performance and Feed Intake of Labeo rohita and Catla catla

Abstract

The impact of temperature on the feed conversion, weight gain and overall growth of two widely cultured freshwater fish species of India Labeo rohita and Catla catla was assessed in the present study. Labeo rohita attained signicantly higher (P<0.05) body weight gain at water temperature of 28°C, followed by the same at water temperature of 32°C, 36°C, 24°C and 20°C, respectively. The sh reared at 28°C water temperature showed the best feed intake value (86% consumption), followed by those maintained at 32°C, 36°C, 24°C and 20°C, respectively. Catla catla also attained significantly higher (P<0.05) body weight gain at water temperature of 28°C. Higher body weight was also observed at temperature of 32°C and 24°C, compared to water temperature of 20°C and 36°C, respectively. The fish reared in 28°C water temperature showed the best feed intake value (93% consumption). Relative weight gain was found to decrease at water temperature above 28°C irrespective of Catla or Rohu. The percentage body weight gain decreased signicantly in Rohu than Catla from water temperature of 28°C. Moreover, feed intake was found decreased at higher temperature; but significant variation was not found between the species. The present model provides a basis for the aqua culturists to optimise release timing of fish seeds and feeding of fish to achieve the maximum weight gain, productivity and economic sustainability