تلخیص
Ecological investigations in terms of seasonal distribution and fluctuations in the population densities have been worked out for four different - local snails species: Lymnaea acuminata, Gvraulus conmvittsculus, Physa aorta and Bellamaya bengalensis. For this purpose, two natural and two artificial habitats were explored. The parameters. like temperature (atmospheric and water), humidity, rainfall. pH, fauna and flora, dissolved oxygen content, water chemistry, oxygen consumption by individual snails, parasitic infections and relationship between snail populations, natality and mortality were studied. The results indicate that each snail species has its own characteristic life pattern depending upon a complex of environmental factors.
AKHTAR TANVEER , DALER KHAN. (1989) Seasonal variations in the environmental factors and snail populations in four different habitats around Lahore, Punjab University Journal of Zoology, Volume 4, Issue 1.
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