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The Behaviour, Survival and Respiration of the Cockles Cerastoderma Edule and C. Glaucum in Air

Published online by Cambridge University Press:  11 May 2009

C. R. Boyden
Affiliation:
Department of Zoology and Comparative Physiology, Queen Mary College, London E 1

Extract

Aspects of the physiology of the two cockles Cerastoderma edule (L.) and C. glaucum (Poiret) in air have been investigated. Both cockles exhibit bradycardia during exposure and are similarly tolerant of anoxic conditions, but C. edule survives longer in air than C. glaucum. This is accounted for by the fact that C. edule displays a behaviour pattern of valve movements upon emersion which allows air-breathing. Oxygen uptake rates of this cockle measured in air lie close to the lowest rates recorded in water, and are considered to approximate to a basal or quiescent level. C. glaucum does not air-breathe and is restricted to lowest shore levels. Values for ‘maximal’ levels of oxygen uptake in water have also been obtained together with estimates of metabolic scope for the cockle.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 1972

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