scholarly journals Responses of four Critical Weight Range (CWR) marsupials to the odours of native and introduced predators

2005 ◽  
Vol 33 (2) ◽  
pp. 217-222 ◽  
Author(s):  
Benjamin Russell ◽  
Peter Banks
Keyword(s):  
Critical Weight ◽  
Weight Range ◽  
Introduced Predators

Is there value in reviewing distribution models? A case study using critical weight range mammals in southeastern Australia

2007 ◽  
Vol 13 (4) ◽  
pp. 227
Author(s):  
Trent D. Penman ◽  
Christopher P. Slade
Keyword(s):  
Review Process ◽  
Statistical Modelling ◽  
Distribution Models ◽  
Critical Weight ◽  
Weight Range ◽  
Recovery Planning ◽  
Southeastern Australia ◽  
South Wales ◽  
Modelling Techniques ◽  
Regional Forest

Models predicting species distributions have become a common tool for wildlife management. These models were used extensively in the development of regional forest agreements (RFAs) throughout Australia. Each RFA is reviewed after it has been active for five years and one component may be to review the distribution models. Over this time there has been an increase in the number of records for many species and improvements in statistical modelling techniques. Here we prepare updated distributional models for three critical weight range mammals in the Eden Management Region in southeastern New South Wales. These models are then used to examine the value of updating models for selected species during the RFA review process. All revised models predicted greater areas of habitat as suitable, largely due to the greater number of known localities. The relative value of many sites changed, thus highlighting areas which require further or more intensive survey work. This study suggests that there is value in preparing models for some species during the RFA review process. For many species updating models can also be valuable in the development of specific research objectives or species recovery planning.

Remnant vegetation provides genetic connectivity for a critical weight range mammal in a rapidly urbanising landscape

2019 ◽  
Vol 190 ◽  
pp. 103587 ◽  
Author(s):  
Kym Ottewell ◽  
Georgina Pitt ◽  
Blair Pellegrino ◽  
Ricky Van Dongen ◽  
Janine Kinloch ◽  
...  
Keyword(s):  
Genetic Connectivity ◽  
Critical Weight ◽  
Weight Range ◽  
Remnant Vegetation

Invasive anuran driven trophic cascade: An alternative hypothesis for recent critical weight range mammal collapses across northern Australia

2020 ◽  
Vol 22 (6) ◽  
pp. 1967-1982 ◽  
Author(s):  
Ian J. Radford ◽  
Leigh-Ann Woolley ◽  
Chris R. Dickman ◽  
Ben Corey ◽  
Dane Trembath ◽  
...  
Keyword(s):  
Trophic Cascade ◽  
Alternative Hypothesis ◽  
Northern Australia ◽  
Critical Weight ◽  
Weight Range

scholarly journals There is a critical weight range for Australia's declining tropical mammals

2014 ◽  
Vol 23 (9) ◽  
pp. 1058-1061 ◽  
Author(s):  
Brett P. Murphy ◽  
Hugh F. Davies
Keyword(s):  
Critical Weight ◽  
Weight Range

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

2012 ◽  
Vol 39 (5) ◽  
pp. 419 ◽  
Author(s):  
Pip Masters ◽  
Chris R. Dickman
Keyword(s):  
Geographical Range ◽  
Southern Boundary ◽  
Critical Weight ◽  
European Settlement ◽  
Initial Expectation ◽  
Introduced Predators ◽  
Northern Edge ◽  
Central Australia ◽  
Set Up ◽  
Demographic Plasticity

Context Central Australia has been a graveyard for native mammals, with many small and medium-sized species becoming extinct or persisting in reduced geographical ranges in this region since the advent of European settlement. Species in the critical weight range (35–5500 g) have been affected most dramatically. Aims We compared the dynamics of two geographically distant populations of a medium-sized surviving desert mammal, the brush-tailed mulgara (Dasycercus blythi, ~100 g), and tested the hypothesis that this species’ persistence can be explained by its demographic plasticity. Methods Paired sampling grids, each 31.5 ha, were set up in the Tanami Desert on the northern edge of the species’ geographical range and near Uluru Kata Tjuta National Park (UKTNP) on the southern boundary. Animals were live-trapped every 3 months between 1992 and 1995, and estimates made of population size, residency, reproduction, bodyweight and tail width; the latter was used as an index of condition. Key results The UKTNP site supported a larger population of D. blythi than did the Tanami Desert site. In both areas, the population fluctuated annually, declining during the breeding season (June to October) and increasing again following the influx of juveniles in spring. Females had one litter per year, with a median and maximum litter size of six; births in the Tanami occurred in July, at least a month earlier than they did at UKTNP. Bodyweights and tail widths peaked before breeding and then declined until spring, with animals retaining better body condition in the Tanami than at UKTNP. In both regions, individuals were resident for 1–2 years; daughters remained near their mother’s home range but males moved to other areas. Conclusions The results provided little support for our initial expectation that populations of D. blythi would behave differently in disparate parts of the species’ geographical range, and suggested instead that this mulgara exhibits a predictable life history, with limited demographic flexibility. Implications The persistence of D. blythi in central Australia is most likely a result of its striking flexibility in use of food resources, its ability to enter torpor and to tolerate large declines in bodyweight and condition, and its propensity to dig deep burrows. We suggest that these attributes buffer mulgaras from the impacts of introduced predators that have contributed to extinctions of other medium-sized marsupials, and from climatic and resource uncertainties that shape the dynamics of many smaller desert mammals.

North Kimberley Mammals – on the fringe of the high-rainfall zone

2015 ◽  
Vol 37 (2) ◽  
pp. 132 ◽  
Author(s):  
Jeff Turpin
Keyword(s):  
Large Scale ◽  
Northern Australia ◽  
Mammal Species ◽  
Critical Weight ◽  
Weight Range ◽  
Far North ◽  
The North ◽  
Survey Technique ◽  
Threatening Processes ◽  
Important Habitat

Six areas were surveyed for terrestrial fauna during remote hiking expeditions in the Kimberley during 2009, 2010, 2013 and 2014. A total of 19 mammal species were recorded, comprising one introduced and 18 native taxa. Significant populations of the northern quoll, monjon, golden-backed tree-rat and scaly-tailed possum were recorded, including from areas where the species were previously unknown. Fractured, rocky terrain in association with rainforest appears to provide important habitat for these species. The use of motion-sensitive cameras, particularly in areas where foraging signs are evident (tracks, diggings, feeding middens, scats) is shown to be a successful and complementary survey technique in detecting critical-weight-range species in the north Kimberley. Such taxa appear to persist in the far north Kimberley in the absence of several threatening processes attributable to large-scale mammal decline across northern Australia.

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