Article: Molt-Related and Size-Dependent Differences in the Escape Response and Post-Threat Behavior of the American Lobster, Homarus americanus.

S. I. CROMARTY, [*]

G. KASS-SIMON [+]

Abstract. Videotaped recordings of adult lobsters of different molt stages were analyzed. The escape response of adults was compared with that of juveniles recorded in an earlier study.

Juvenile lobsters always respond to a threat with escape behavior irrespective of their molt stage, but in adults the probability of eliciting a response was a function of molt stage: more hard-shelled (intermolt stage C) and (premolt stage D) animals tailflipped than did soft-shelled (postmolt stages A and B) animals.

The number, frequency, and duration of tailflips, and the average distance swum by animals in each ...

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