by Tony Pople and Gordon Grigg
Department of Zoology, The University of Queensland
for Environment Australia, August 1999
Chapters 10,11,12 and 13 and Appendix 1 provided by staff at Environment Australia
Figure 18 (a-c) South Australia
Aerial surveys commenced in 1978 and have been undertaken annually by Grigg and co-workers under contract to SADENR. The survey area is approximately 240,000 square km and the sampling intensity approximately 1.5%.
Since 1995, the population estimates (thin line, open symbols) have included an estimate of numbers outside the aerial survey area. For western grey kangaroos, population size has been calculated from a revised correction factor (increased by a factor of 2) for aerial survey estimates.
18a Population trends, harvest and quota figures for red kangaroos
18b Population trends, harvest and quota figures for western grey kangaroos
18c Population trends, harvest and quota figures for common wallaroos