A5040750443- Turtle Biology and Conservation
- Amphibian and Reptile Biology
- Animal Behavior and Reproduction
- Fish Ecology and Management Studies
- Hydrology and Watershed Management Studies
- Wildlife Ecology and Conservation
- Bird parasitology and diseases
- Flood Risk Assessment and Management
- Physiological and biochemical adaptations
- Hydrology and Sediment Transport Processes
- Venomous Animal Envenomation and Studies
- Genetic diversity and population structure
- Water resources management and optimization
- Animal Ecology and Behavior Studies
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Rabies epidemiology and control
- Species Distribution and Climate Change
- Soil erosion and sediment transport
- Rangeland and Wildlife Management
University of Canberra
2002-2023
ACT Government
2002-2023
Parks and Wildlife Service
2012
Australian National University
2007
CSIRO Publishing
2001
Sex in reptiles is determined by genes on sex chromosomes or incubation temperature. Previously these two modes were thought to be distinct, yet we show that high temperatures reverse genotypic males (ZZ) phenotypic females a lizard with ZZ and ZW chromosomes. Thus, the W chromosome not necessary for female differentiation. determination probably via dosage-sensitive male-determining gene Z inactivated extreme temperatures. Our data invite novel hypothesis evolution of temperature-dependent...
Abstract A major outstanding challenge for environmental flow management is to move from a single site, reach or river focus planning and delivering flows across entire basins. There need case studies of basin‐scale water delivery as first step in understanding eventually generalising responses. The Commonwealth Environmental Water Holder manages portfolio entitlements protecting restoring aquatic ecosystems the Murray–Darling Basin ( MDB ). This article describes strategies used by holder...
Abstract The Murray–Darling Basin in south‐eastern Australia contains over 70,000 km 2 of wetlands and floodplains, many which are poor condition. In response, Australian governments have committed to a major restoration program, the Plan that includes management 2,750 Gl environmental water protect restore aquatic ecosystems. is being undertaken within an adaptive framework monitoring outcomes flows seven river valleys. This paper provides overview 5‐year project some preliminary results....
Water resources for irrigation in the Murray–Darling Basin have been heavily over-allocated, with major detrimental effects on wetlands and rivers. The Plan is intended to return water from irrigated agriculture environment but requires comprehensive, accurate accounting achieve this objective. Floodplain harvesting – diversion storage of overland flows into on-farm dams widely practised by irrigators northern Basin. By reducing volumes river flows, floodplain has negative downstream users...
Abstract The spatial resources used by a population of lace monitors ( Varanus varius ) were examined over an active season (September–April) and inactive (May–August). In total, 33 observed, which 23 radio‐tracked for up to 11 months. Radio tracking provided new information on the ecology V. . During summer (December–February), moved often, large (184.5 ha) overlapping home‐range areas. intermediate seasons spring (September–November) autumn (March–May), less often than 39% home‐range....
The diet of a population lace monitors, Varanus varius, at Lake Burrendong was examined over the spring, summer and autumn seasons. Carrion dominated diet; it eaten consistently in all seasons by monitors generally supplemented live mammalian kills invertebrates. Nestling birds rabbits as well bird reptile eggs were mainly during flush periods spring early summer. data reported here agree with other reports for genus Varanus: that they are generalist carnivorous predators scavengers.
We contrasted diets of three turtles (Elseya albagula, Myuchelys latisternum, Emydura krefftii) from free-flowing or impounded rivers in southeastern Queensland, Australia, to evaluate the effects flow regulation. The turtle species encompassed herbivorous, carnivorous, and omnivorous feeding guilds, respectively. study design simultaneously considered ontogenetic dietary shifts seasonal on prey availability. Relative river samples, for impoundments were substantially reduced abundance,...
The Chelidae is a family of side-necked turtles restricted in distribution to South America and Australasia. While their biology Australia reasonably well known, species New Guinea are very poorly known despite high diversity, especially the southern lowlands. In this paper, we report on distribution, habitat reproductive freshwater TransFly region Western Province Papua Guinea, with special emphasis reproduction Emydura subglobosa, Elseya branderhorsti novaeguineae. Seven were captured,...
Environmental flows are a critical tool for addressing ecological degradation of river systems brought about due to increasing demand limited water resources. The importance basin scale management environmental has long been recognised as necessary if managers achieve social, economic and objectives. challenges in managing now emerging include the time taken changes become manifest, uncertainty around large-scale responses that most interventions take place at smaller scales. purpose this...
Adult sex ratios vary considerably among populations of single species and across years, but the best evidence is drawn from with temperature-dependent determination. It difficult to disentangle effects bias in production sexes a range other factors contributing biased adult ratios. In this paper, we survey constrained produce 1 : offspring by genotypic determination show considerable variation Raw Emydura macquarii emmottii were significantly nine 11 examined. all one case, was strongly...
Varanus rosenbergi females oviposit in nests excavated termite mounds summer, and hatching occurs the following spring after a seven-month incubation period. In this study, we characterized developmental features associated with prolonged of species at Kangaroo Island South Australia. Oviposition shortly limb buds have formed, subsequent pattern organogenesis is similar to that other lizards. Survival eggs incubated constant temperatures ranging from 26–33°C was 89–100%, whereas survival...
We use the Eastern Gas Pipeline (EGP) in southeastern Australia as a case study to examine value of documenting and retrieving entrapped fauna from open pipeline trenches. Daily inspection n...
The energy and water used by Varanus varius correlated with changes in weather, activity, possibly the availability of prey. In summer, CO2 production influx rates were high (0.147 mL g−1 h−1 23.6 H2O kg−1 d−1) but substantially lower during autumn (0.053 9.1 d −1) winter (0.016 2.4 d−1), increasing again spring (0.052 7.9 d−1). summer‐winter difference represented more than a ninefold reduction expenditure flux. However, individual V. could manipulate their requirements up to sixfold summer...
Abstract Cooper Creek is one of Australia's largest unregulated river systems and the world's most variable large systems. It a dynamic environment that oscillates between booms busts; yet, many species thrive in it. One these species, turtle ( Emydura macquarii emmotti ) has received little attention, despite being freshwater turtles living further inland than any other Australian turtle. We conducted surveys for E. m. 2001–2004, 2019, 2022, focussing predominantly on Waterloo waterhole....