Article: Shell-selection behavior of the hermit crab Pagurus granosimanus in relation to isolation, competition, and predation.(SPECIAL THEME SECTION)

ABSTRACT Hermit crabs select shells based on size, weight, species of gastropod, and shell condition. However, in many environments, empty, undamaged gastropod shells are in short supply and this shortage may influence hermit crab shell selection behavior. In this study, the effects of isolation, competition, and predation on shell selection behaviors were investigated using Pagurus granosimanus (Stimpson), a hermit crab from San Juan Island, WA. The hermit crabs were provided with a choice between undamaged, slightly damaged, or very damaged Nucella lamellosa (Gmelin) gastropod shells and were subjected to either isolation (control treatment), water infused with the ...

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