ABSTRACT
The tunica externa of the anterior sac of the swimbladder in Cyprinidae is highly extensible, but a large part of its compliance is associated with retardation times greater than one second. The compliance is only partly reversible.
The significance of these properties is discussed in relation to a possible high-pass frequency filter for the Weberian apparatus.
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Compliance (cm.2/dyne) is here used as the reciprocal of Young’s modulus. This usage must be distinguished from the use of compliance (cm./dyne) as the reciprocal of stiffness. There appears to be no generally accepted term for the reciprocal of Young’s modulus (Burton, 1954)1 but I follow Alfrey & Doty (1945) in calling this quantity ‘compliance’.
Copyright © 1961 The Company of Biologists Ltd.
1961
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