Abstract
The growth stages of Trebralia palustris can easily bedistinguished by the presence of a varix on the last whorl and the shape ofthe outer lip. In a T. palustris population in the mangal of IriomoteIsland, southern Japan, juveniles are the most abundant and sub-adults arethe least abundant. The mean size of sub-adults is not different from that ofadults in sites with similar environmental conditions, but the mean sizesdiffer in different life environments. Sub-adult and adult snails in awell-developed mangrove stand of Rhizophora stylosa and Bruguiera gymnorrhiza with rich food resources are larger than those in arather open stand of short Avicennia marina trees with comparativelypoor food resources. The size of snails positively affected some population traitssuch as fecundity and the grazing rate of mangrove litter.
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Nishihira, M., Kuniyoshi, M. & Shimamura, K. Size variation in Trebralia palustris (Gastropoda: Potamididae) of Iriomote Island, southern Japan, and its effect on some population characteristics. Wetlands Ecology and Management 10, 243–247 (2002). https://doi.org/10.1023/A:1020131914950
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DOI: https://doi.org/10.1023/A:1020131914950