Abstract
Mean fertility in three koala populations in Victoria in 1979 varied from 63% on French I, to 13%
at Walkerville and 22% on Phillip I. Similar differences between the two island populations have existed
for at least 30 y. A method of assigning animals to age classes on the basis of the wear patterns on
the premolar was devised and reproduction in 1979 examined on an age-specific basis. The low fertility
was associated with a reproductive failure among females older than 3 y. On Phillip I. this is thought
to be due to a widespread reproductive tract disease in females, possibly caused by ingestion of phytooestrogens
from eucalypt foliage. At Walkerville a combination of reproductive tract disease, poor
nutrition and heavy tick burdens is thought to be the cause.
Subject
Management, Monitoring, Policy and Law,Ecology, Evolution, Behavior and Systematics
Cited by
73 articles.
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