Author(s): Deepika Paliwal, VP Saini, OP Sharma, ML Ojha and HK Jain

Abstract: To assess the impact of temperature on growth and survival of Labeo rajasthanicus spawn, an experiment was conducted under laboratory conditions using FRP tanks (1m³). Four temperature treatments (22, 26, 30 and 34 ⁰C) were used in triplicate. Total five thousand spawns were stocked in each tank and their growth and survival was monitored for a period of 21 days. The weight gain had positive relationship with temperature treatments. As such the growth gain increased with increasing temperature (22 to 30 ⁰C). However, a reduced growth rate was noticed with further increase (30 to 34 ⁰C) in rearing temperatures. SGR was significantly higher at 30 ⁰C (5.19 ± 0.11) as compared to other treatments except 26 ⁰C. Whereas, lowest SGR (4.04 ± 0.06) was found in lowest (22 ⁰C) temperature treatment. In general the spawn reared at 30 ⁰C and lower temperature performed better than that reared at higher (34 ⁰C) temperature.

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