Abstract
A decline in the koala population on Phillip I , has been evident for some time. This study, in an area
set apart from public access, quantifies some aspects of this decline. A triple-count technique for a closed
population model, with the freedom that the probability of sighting can vary between the surveys, was
used to obtain an estimate of the population within a 65-ha study area. The initial population, in June
1980, was estimated to be 117; this declined to 62 in 3.5 years, during which period 23 deaths and
24 births were recorded. The decline, which averaged 16 koalas per year, is discussed in terms of the
low birth rate, of dispersal, and of the contribution of predation by dogs to the death rate.
Subject
Management, Monitoring, Policy and Law,Ecology, Evolution, Behavior and Systematics
Cited by
4 articles.
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