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 17 (a-d) New South Wales
New South Wales National Parks and Wildlife Service have undertaken aerial surveys, annually, since 1975-76. Monitor blocks were flown up until 1983 (solid symbols), after which the entire western plains have been surveyed (open symbols). The survey area is approximately 500,000 square km and the sampling intensity approximately 0.8%.
Grey kangaroo numbers determined from aerial survey were apportioned to eastern and western greys (approximately 70:30) according to ground surveys by Caughley et al. (1984) and harvest records.
Eastern grey kangaroo numbers for the eastern highlands (Southwell et al. 1997) have been included into the total estimate since 1989. This estimate is shown as a thin line and is used to determining the quota. Wallaroo population estimates were determined from these ground surveys (solid symbols) and, since 1993, have been combined with estimates from helicopter surveys (open symbols).
- 17a Population trends, harvest and quota figures for red kangaroos
- 17b Population trends, harvest and quota figures for eastern grey kangaroos
- 17c Population trends, harvest and quota figures for western grey kangaroos
- 17d Population trends, harvest and quota figures for common wallaroos 5