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Locomotory Activity Rhythms in Some Littoral Orchestia [Crustacea: Amphipoda]

Published online by Cambridge University Press:  11 May 2009

D. J. Wildish
Affiliation:
Medway & Maidstone College of Technology, Horsted, Maidstone Road, Chatham, Kent1

Extract

The cosmopolitan genus Orchestia is divisible into two ecological groups: littoral and terrestrial, as denned by Hurley (1959). Only littoral species are known from Britain and three which occur in the Medway estuary have been studied. O. gammarella (Pallas) and O. mediterranea A. Costa are marine or estuarine, the former being found above the recent high water mark under wrack or stones and the latter below this level under stones. O. cavimana Heller is a freshwater species, extending into the oligohalinicum of estuaries (Den Hartog, 1963), which is found near the wrack line. During a study of the biology of these species possible mechanisms which control the tidal levels occupied on the shore were investigated, including the temporal characteristics of locomotory activity.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1970

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References

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