Shell-Exchange Behavior in a Hermit-Crab-Like Tanaidacean (Crustacea: Malacostraca)

This study describes shell-exchange behavior in the hermit-crab-like tanaidacean sp. (Pagurapseudidae: Pagurapseudinae) under captive conditions. I observed one shell exchange by sp., the behavioral sequence of which was as follows: a shell-carrying tanaidacean 1) grasped the edge of the aperture of...

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Bibliographic Details
Published inZoological science Vol. 36; no. 6; p. 468
Main Author Kakui, Keiichi
Format Journal Article
LanguageEnglish
Published Japan 09.12.2019
Subjects
Animal Shells
Animals
Behavior, Animal
Crustacea - physiology
mobile shelter
convergence
Arthropoda
Peracarida
asymmetry
evolution
conchicolous lifestyle
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Summary:This study describes shell-exchange behavior in the hermit-crab-like tanaidacean sp. (Pagurapseudidae: Pagurapseudinae) under captive conditions. I observed one shell exchange by sp., the behavioral sequence of which was as follows: a shell-carrying tanaidacean 1) grasped the edge of the aperture of an empty gastropod shell with its right cheliped; 2) inspected the condition inside the shell four times by inserting the anterior portion of its body into the shell; and 3) moved into the shell, posterior end (pleotelson) first. The elapsed time from the initial grasping of the empty shell to completing the move into it was 2 min 20 sec. In contrast to a tanaidacean and hermit crabs, the individual of sp. did not examine the external surface of the shell during the single shell exchange observed.
ISSN:0289-0003
DOI:10.2108/zs190048