The Influence of Environmental Stimuli on the Direction of Movement of the Supralittoral Gastropod Littorina Irrorata
Abstract:The topography, macrofauna and flora, salinity, and temperature of a salt marsh habitat of Littorina irrorata are discussed. The dispersion of L. irrorata in relation to salinity, food supply, substrate elevation and tidal exposure, substrate slope, vegetation, and wave action were studied as were the effects on the snails' movement of light, gravity, light and gravity combined, the air-water interface, desiccation, starvation, temperature, and tide.
The behavioral responses found to be of importance in upward movement are positive phototaxis, negative geotaxis under nonstress conditions, and an augmented negative geotaxis during submergence. Behavioral responses of importance in downward movement are positive geotaxis at high temperatures, and positive geotaxis when wetted with sea water after desiccation.
Document Type: Research Article
Publication date: June 1, 1972
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