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Some aspects of the respiratory physiology of three South African freshwater pulmonate snails, Bulinus africanus , Bulinus tropicus , and Lymnae natalensis Krauss



Some aspects of the respiratory physiology of three South African freshwater pulmonate snails, Bulinus africanus , Bulinus tropicus , and Lymnae natalensis Krauss



S African J Sci 62(7): 215-223



The respiratory importance of the mantle gas, the possible function of the mantle gas as a physical gill and the ability of the snails to survive in anaerobic conditions have been investigated. Pulmonary respiration does not appear to be as important as cutaneous respiration in supplying oxygen to the snails. Although the air in the mantle cavity functions as an air store, there is evidence, albeit somewhat circumstantial, which suggests that the primary function of the mantle gas may be in buoyancy regulation. All Snails were found to withstand nearly anoxic conditions for long periods, but this ability was found to be lowered by increase in temperature.

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