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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 91, No. 1, 1996, pp. 119-128
Bioline Code: oc96021
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 91, No. 1, 1996, pp. 119-128

 en Thermal effect on the life-cycle parameters of the medically important freshwater snail species lymnaea (radix) luteola (lamarck)
Aziz, MD Abdul & Raut, SK

Abstract

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.

Keywords
Lymnaea (Radix) luteola - life-cycle parameters - temperature - food - pH - salinity - India

 
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