1 research outputs found
Thermal effect on the life-cycle parameters of the medically important freshwater snail species lymnaea (radix) luteola (lamarck)
The snails Lymnaea (Radix) luteola exhibited marked variations in
growth, longevity, and attaining sexual maturity at different
temperatures and diets. At 10 C, irrespective of foods, pH and salinity
of water, the snails had minimum life span, maximum death rate and
lowest growth rate. At 15 C, the growth rate was comparatively higher
and the snails survived for a few more days. But at these temperatures
they failed to attain sexual maturity. Snails exposed to pH 5 and 9 at
20 , 25 , 30 , 35 C and room temperatures (19.6 -29.6 C); to 0.5, 1.5
and 2.5 NaCl at 20 and 35 C; to 2.5 NaCl at 25 C and room temperatures
failed to attain sexual maturity. The snails exposed to pH 7 and
different salinity grades at 20 , 25 , 30 , 35 C and room temperatures
became sexually mature between 25-93 days depending upon the type of
foods used in the culture