
TY  - JOUR
A1  - Ogden, J 
T1  - Population Size of the Wedge-tailed Shearwater <I>Puffinus pacificus</I> Population in <I>Pisonia grandis</I> Forest on Heron Island in 1992
JF  - Emu
JO  - EMU
Y1  - 1994
VL  - 94
IS  - 2
SP  - 65
EP  - 68
KW  - 
UR  - https://doi.org/10.1071/MU9940065 
N2  - 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. 
ER  -

