Lead Toxicity in Mute Swans
LEAD TOXICITY IN MUTE SWANS Cygnus olor (Gmelin). By JOHN O'HALLORAN A thesis submitted to the National University of Ireland in candidature for the degree of Doctor of Philosophy September 1987
LEAD TOXICITY IN MUTE SWANS
Cygnus olor (Gmelin).
By
JOHN O'HALLORAN
A thesis submitted to the National University of Ireland
in candidature for the degree of Doctor of Philosophy
September 1987
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<strong>Swans</strong><br />
ACKNOWLEDGEMENTS<br />
We are grateful to Mr T. Carruthers, Mr R. Coll<strong>in</strong>s and Mr P. Brennan<br />
for help <strong>in</strong> the fieldwork, and Dr T. Kelly for helpful discussion.<br />
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BELLROSE. F.C. 1959 <strong>Lead</strong> poison<strong>in</strong>g as a mortality factor <strong>in</strong> waterfowl populations.<br />
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