Maximum-likelihood phylogeny of whole-genome single nucleotide polymorphisms of the FT7 Francisella tularensis isolate from a ringtail possum
in Australia (boldface) with other Francisella species, including biovar japonica.
In order to assess the relevance of intraspecific variation in foliar chemistry to the choices made by individual animals, we measured the foliar sideroxylonal concentration and the potential DMI of common ringtail possums in a large number of E.
Calibration equations were developed to estimate sideroxylonal concentration and DMI by common ringtail possums using reference values derived from the HPLC assays and animal experiments, respectively.
The preliminary experiment clearly showed substantial variation in dry matter intake (DMI) of common ringtail possums between individual E.
The addition of pure sideroxylonal to the artificial diet substantially reduced DMI by common ringtail possums (P [less than] 0.
This indicates that common ringtail possums are indeed able to regulate their intake of sideroxylonal, but that perhaps other factors interfere with this when feeding on a foliage diet (see Discussion).
Managing woodlands towards their original open structure through biomass reduction counters the impact of ringtail possums by reducing habitat carrying capacity.
Common Ringtail Possum and Common Brushtail Possum are widespread primarily folivorous mammals that feed on many eucalypt and other species.
Several factors control populations of ringtail possum including availability of shelter, density of understorey vegetation, predation (originally mainly by humans, dingoes, spot-tailed quolls, large raptors and large owls, and now mainly by cats, foxes, large raptors and large owls where they occur), fire, food quality and availability, and heat waves.
Biomass accumulation is a necessary condition for ringtail possum overpopulation.
In addition to bushland remnants, street and garden trees in Mount Eliza with dense understoreys are also severely affected by ringtail possum overbrowsing (Carr et al.
Metabolic fate of dietary terpenes from Eucalyptus radiata in common ringtail possum