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AuthorIris Sipman
TitlePredation by Gecarcoidea lalandii (Crustacea, Gecarcinidae) on dextral and sinistral Amphidromus inversus (Gastropoda, Pulmonata, Camaenidae)
JournalVita Malacologica
KeywordsAmphidromus inversus; Gecarcoidea lalandii; left-right asymmetry; predation; chiral proportions
AbstractThe tropical tree snails of the subgenus Amphidromus
s.str. receive much attention from researchers because
populations consist of roughly equal proportions of dextral
and sinistral individuals. Studies indicate that this
stable genetic antisymmetry is maintained because of disassortative
mating. Deviations of the theoretically expected
50:50 proportion have, however, been frequently
reported. An explanation for this deviation could be modulation
by chirally biased predation. On the island of
Kapas, Malaysia, seventeen individuals of Gecarcoidea
lalandii, a nocturnal terrestrial crab, were caught and
housed with live Amphidromus inversus. A low level of
predation by the crab on the snails was found. However,
there is no reason to assume that predation by G. lalandii
is chirally biased.
Document typearticle
Download paperpdf document http://www.repository.naturalis.nl/document/621887