Population dynamics of Dasycercus blythi (Marsupialia: Dasyuridae) in central Australia: how does the mulgara persist?

The brush-tailed mulgara (Dasycercus blythi) persists in central Australia despite challenges faced by other medium-sized marsupials, primarily due to its resource flexibility, ability to enter torpor, and tolerance for significant declines in body condition. A study comparing two geographically distant populations—one near Uluru-Kata Tjuta National Park (UKTNP) and another in the Tanami Desert—revealed predictable population dynamics with limited demographic plasticity. Both sites showed annual fluctuations, with populations declining during the breeding season and recovering after juvenile influxes. While females remained near their natal home ranges, males dispersed widely. The UKTNP site supported a larger population, but individuals in both regions exhibited similar life history traits, including one litter per year and seasonal changes in body condition. These findings suggest that D. blythi's persistence is not due to demographic flexibility but rather its ecological adaptability, which buffers it against introduced predators and environmental uncertainties.

Masters, P., & Dickman, C. R. (2012). Population dynamics of Dasycercus blythi (Marsupialia: Dasyuridae) in central Australia: how does the mulgara persist? Wildlife Research, 39(5), 419–428. https://doi.org/10.1071/wr11156