Orientation and Social Behavior in the Supralittoral Isopod Ligia Exotica (Crustacea: Oniscoidea)
Ligia exotica is aggregative, tending to seek out conspecifics. It is hypothesized that Ligia must seek new shelters repeatedly with changing tides because of their restricted water requirements, and that attraction to conspecifics already in a suitable habitat is an additional orientational mechanism to those external environmental factors influencing microhabitat selection. Experiments on object orientation demonstrated a strong tendency to move toward contrasting landmarks, the result being occupation of rocky areas on the shoreline. Brief descriptions of sexual and agonistic behavior are included.
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Document Type: Research Article
Publication date: 1978-10-01
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