Population and demographic patterns of rabbits (Oryctolagus cuniculus) at Roxby Downs in arid South Australia and the influence of rabbit haemorrhagic disease

Abstract

Rabbit populations and demography were surveyed at Roxby Downs in arid South Australia from 1989 to 1997. Rabbit numbers typically peaked in late summer following breeding from late winter to early summer. After initial declines attributable to burrow flooding and increased populations of virus vectors, rabbit numbers increased by approximately 400% after significant rains. Introductions of Spanish rabbit flea, a vector of Myxoma virus, did not influence rabbit numbers but rabbit haemorrhagic disease (RHD) had a dramatic and sustained influence on rabbit numbers. The optimum times for release of RHD are discussed.