A lot of gastropod species and hermit crabs specimens live associated to Posidonia oceanica leaves. The results, obtained analyzing the two taxa associated with the foliar stratum of two P. oceanica beds off Elba island, show that both gastropods and crabs are sensible to the nycthemeral cycle. In particular, the hermit crabs increase their presence by night, probably as an answer to a lower predatory pressure exerted e.g. by fishes by night.
Nycthemeral migrations of gastropods and hemit crab species in two Posidonia oceanica beds
PESSANI, Daniela;BELCI, FABIO;TIRELLI, Santina
2012-01-01
Abstract
A lot of gastropod species and hermit crabs specimens live associated to Posidonia oceanica leaves. The results, obtained analyzing the two taxa associated with the foliar stratum of two P. oceanica beds off Elba island, show that both gastropods and crabs are sensible to the nycthemeral cycle. In particular, the hermit crabs increase their presence by night, probably as an answer to a lower predatory pressure exerted e.g. by fishes by night.
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