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Journal of Experimental Biology 138,195-203 (1988)
Published by Company of Biologists 1988

Cardiac Response to Voluntary Diving in Tufted Ducklings (Aythya Fuligula)

E. KEIJER 1, P. J. BUTLER 1, and A. J. WOAKES 2

1 Department of Zoology and Comparative Physiology, The University of Birmingham, PO Box 363, Birmingham B15 2TT, UK
2 Department of Zoology and Comparative Physiology, The University of Birmingham PO Box 363, Birmingham B15 2TT, UK

To whom reprint requests should be sent

Heart rate was monitored in tufted ducklings during first-ever and subsequent voluntary whole-body dives. Although the cardiac response to first-ever dives varied between individuals, the average response to these dives, to the following 20 dives, and to dives of longer duration closely resembled the response seen in adult tufted ducks. These results indicate that the cardiac response to voluntary diving in the tufted duck does not result from habituation of the classical bradycardia seen during involuntary diving

Key words: tufted ducklings, Aythya fuligula, voluntary dives, cardiac response, heart rate, submergence

Accepted on March 16, 1988




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[Abstract] [PDF]


© The Company of Biologists Ltd 1988