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
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
J. O'Halloran and R. Coll<strong>in</strong>s<br />
Of the . 61 birds recovered . . or controlled . , at least ' JS a re k nown to<br />
have at ta med. c.~d u It hood. Ftl tee.n birds reached at least the age ofrive.<br />
The longes.t lilespan recorded 1s that of a bird r<strong>in</strong>ged at Dundrum,<br />
Co. Down tn August 197? an.d recovered at the same location <strong>in</strong> April<br />
1984. T~e natal year of this bird was 1971 or earlier, its lifespan, theref?re,<br />
betn~ 12 y~ars 9 months at least. This is the longest documented<br />
l1f es~an . ol an I nsh <strong>Mute</strong> Swan. The longest lifespan on record for the<br />
species ts 19 years 5 months (Cramp and Simmons 1977) .<br />
. TJ'.e mo
Change language