
%0 Journal Article
%A Ogden, J 
%T Population Size of the Wedge-tailed Shearwater <I>Puffinus pacificus</I> Population in <I>Pisonia grandis</I> Forest on Heron Island in 1992
%J Emu
%D 1994/06/01
%V 94
%N 2
%P 65-68
%K 
%R https://doi.org/10.1071/MU9940065
%U https://www.publish.csiro.au/paper/MU9940065 
%X Repeated counts of Wedge-tailed Shearwater Puffinus pacificus burrows were made in two 30 &#215; 30 m permanent plots in Pisonia grandis forest on Heron Island in 1978,1979 and 1992. The results support the population estimates of Hill &amp; Barnes (1989) and their suggestion that the shearwater population almost doubled (to c. 16 000 pairs) between 1983 and 1985. However, due to the wide confidence limits on most estimates, a more gradual increase (of c. 3% per annum) cannot be ruled out. The 1992 population estimate was 16 503 &#177; 3427 pairs. Because shearwaters are supposedly faithful to nesting sites, the increase poses questions about inter-island movement and social organisation within colonies. It may also present problems for management of the Heron Island population. 
