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Sexually Dimorphic Free-Swimming Behaviour in the Amphipod Crustacean Ampelisca Abdita

Published online by Cambridge University Press:  11 May 2009

B. Borowsky
Affiliation:
Osborn Laboratories of Marine Sciences, Brooklyn, New York, USA
P. Aitken
Affiliation:
Osborn Laboratories of Marine Sciences, Brooklyn, New York, USA

Extract

This paper describes a novel sexually dimorphic pattern of behaviour in the tube-building amphiplodAmpelisca abdita (Mills). Mature males and females enter the water column at night. However, while males enter the water column every night, females enter it only when they moult. Since female amphipods only mate shortly after they moult, it is hypothesized that this sexually dimorphic pattern of free-swimming behaviour is an adaptation that permits males and receptive females to locale each other during the brief period when copulation can occur, while reducing the time that females are exposed to pelagic predators.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1991

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