Movement ecology for conservation action 1.2.8

Tracks
Riverbank Room 8
Monday, November 24, 2025
2:00 PM - 3:30 PM
Riverbank Room 8

Speaker

Hannah Gerke
Phd Candidate
Australian National University

Movement behaviour and personality of eastern brown snakes on the urban edge

2:00 PM - 2:15 PM

Abstract document

Eastern brown snakes (Pseudonaja textilis) are the most common snakes encountered in suburban Canberra, with hundreds translocated out of conflict situations each year due to fear of snakebite. As rates of both urbanization and human-snake conflict increase, understanding the impacts of management strategies like translocation are essential. Previous research has shown that translocating snakes out of their home range can negatively influence their movement, reproduction, and survival. However, despite their critical role in human-snake conflict and their wide occurrence across Australia, brown snakes remain grossly understudied. Our research aims to answer key questions about brown snake spatial ecology and to determine the impacts of translocation. To address this, we compared the survival and movement behaviour of 11 translocated and 9 resident snakes implanted with VHF radio-transmitters. We calculated metrics like distance per move/per day, displacement, and area used (utilization distribution) to test for differences between translocated and resident snakes. Additionally, because consistent individual differences in behaviour (personality) can affect animal spatial movements and/or survival, we sought to identify the relationship between snake personality and movement behaviour in the field. We conducted standardised behavioural tests with 4-5 trials per individual to quantify variation in among-individual behaviour (personality) and within-individual behaviour (plasticity). The next stage of our research will quantify the degree to which personality/plasticity explains post-translocation movement and survival. By understanding sources of variation in venomous snake behaviour and individual responses to translocation, we can improve strategies for managing human-snake conflict along the urban edge.

Biography

Hannah Gerke is a PhD candidate at the Australian National University, studying human-snake conflict and the effects of translocation on eastern brown snakes. She's passionate about understanding how human activities impact wildlife and developing strategies to promote coexistence with wildlife. As a herpetologist at heart, she has a fondness for all things scaley. Prior to moving to Australia, she researched the effects of the 2011 Fukushima Daiichi Nuclear Accident on wildlife in Japan, with a focus on contaminant exposure and spatial movements in snakes.
Mr Bray Muir
Student
Griffith University

Juvenile Koala Dispersal Across Human-Altered Landscapes.

2:15 PM - 2:30 PM

Abstract document

Koalas in Southeast Queensland face increasing pressures from urban expansion, habitat fragmentation, and environmental change. These factors can significantly affect koala ecology including the natural dispersal behaviours of juvenile koalas within the landscape. This research investigates fine scale dispersal patterns of juvenile koalas from remnant, translocated, and receiving populations to assess how landscape modification and translocation practices affect movement ecology. Using GPS tracking data, detailed tree and site-level habitat variables, and environmental data (e.g., weather, vegetation structure), this study analyses dispersal distances, tree use, and movement strategies of juvenile koalas. Comparative spatial and statistical analyses will explore how factors such as gender, habitat composition, and connectivity influence dispersal success. Ultimately, the project aims to identify key barriers and facilitators to successful dispersal in urbanised environments, with findings intended to inform more effective conservation planning and translocation protocols. By advancing our understanding of juvenile koala movement in human-altered landscapes, this research will provide evidence-based strategies to enhance population resilience and ensure effective, informed actions for koala conservation.

Biography

Bray Muir is an emerging wildlife biologist specialising in koala ecology. Based on the Gold Coast, Queensland, Bray is currently completing an Honours degree investigating the dispersal behaviour of juvenile koalas, with a focus on the effects of habitat fragmentation, urbanisation, and translocation. Over the past four years, Bray has actively contributed to large-scale monitoring projects, helping to track and monitor more than 350 individual koalas. This work involves the integration of GPS movement data, behavioural observations, and tree/habitat metrics to understand how koalas navigate increasingly complex environments. Bray’s research aims to inform more effective conservation planning and koala management practices, particularly for vulnerable populations in rapidly developing regions. Passionate about applied ecological research, Bray is committed to developing science that drives bold, evidence-based conservation outcomes.
Claire Moore
Phd Candidate
Flinders University

Koala Responses to Post-Fire Plantation Harvesting on Kangaroo Island

2:30 PM - 2:45 PM

Abstract document

In early 2020, bushfires on Kangaroo Island, South Australia, destroyed approximately 84% of the known koala habitat, displacing an estimated 5,000 individuals into fragmented native vegetation and unburnt Eucalyptus globulus (Tasmanian Blue Gum) plantations. These plantations initially served as critical refuges, but ongoing harvesting is now removing key food and shelter resources. With koala densities reaching up to five individuals per hectare, the risk of displacement and mortality has increased, particularly where surrounding native vegetation remains poorly regenerated or already overpopulated.
This study applies movement ecology to assess how koalas respond behaviourally to plantation harvesting in a post-fire environment. Using GNSS tracking collars, spatial analysis, and home range modelling, we evaluated movement patterns and tested the effectiveness of current forestry protocols in reducing disturbance impacts. Prior to harvest, males and females had significantly different home range sizes (mean = 4.4 ha and 1.2 ha respectively; p = 0.02). After harvesting began, home ranges increased significantly for both sexes (p = 0.001), with no remaining difference between them.
Movement across recently harvested areas was constrained by felled tree debris, with some individuals remaining in the same unharvested tree or moving less than 100 m until the area was cleared. Observational data revealed up to five koalas sharing single unharvested trees three months after harvest.
By analysing koala movement and displacement under the combined pressures of bushfire, habitat fragmentation, and industrial forestry, this research provides critical insight into the behavioural responses of koalas in plantation landscapes. The findings offer evidence to inform more effective forestry management practices and improve conservation strategies for koalas as they face increasing environmental stress.

Biography

I am a geospatial analyst with an interest in applying Geographic Information Systems (GIS) and remote sensing to wildlife conservation and spatial epidemiology. My current research focuses on understanding how koalas move through and use fragmented landscapes, particularly in areas affected by bushfires and plantation forestry. I use a combination of GPS tracking, satellite-derived vegetation indices, LiDAR technology, and species distribution modelling to investigate how koalas respond to habitat disturbance and regeneration over time. I am especially interested in the role of remnant vegetation and managed forestry areas in supporting koala recolonisation after fire events. With a background in veterinary conservation medicine and geospatial information systems, I am passionate about using spatial data to inform conservation management and improve outcomes for vulnerable species. I also teach GIS at university level, aiming to equip the next generation of ecologists with the skills to tackle complex environmental challenges. My work supports evidence-based decision-making for koala habitat protection and broader biodiversity monitoring at the landscape scale.
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Scott Forrest
PhD Student
Queensland University Of Technology, CSIRO

Landscape-scale predictions with deepSSF: improving transferability across space and species

2:45 PM - 3:00 PM

Abstract document

Predictions of animal movement are vital for understanding and managing wild populations. However, the fine-scale, complex decision-making of animals can pose challenges for the accurate prediction of trajectories, and typically require high quality data that is representative of multiple individuals and environmental configurations. Animal movement data can be expensive and logistically challenging to collect, but there has been significant progress in other fields of leveraging knowledge gained from one task to improve performance on related tasks, referred to as transfer learning. We tested this for predicting animal movement by training a deepSSF model on GPS-tracking data from two similar species; water buffalo (Bubalus bubalis) and feral cattle (Bos indicus), across multiple regions in northern Australia. We designated a target site and assessed which combination of pre-training and fine-tuning led to the best model performance. In our case, pre-training allowed the model to learn fundamental principles of animal movement, as well as extract relevant environmental features, such as rivers, water bodies and the configuration of habitat patches, which was fine-tuned to the region of interest, improving overall performance. We discuss promising possibilities of a general model that has been pre-trained on many more regions, species and ecosystems that can be fine-tuned to few data.

Biography

I am a intersted in a range of movement ecology problems across scales from neurobiology to population-level processes, with a focus on applied problems that can inform conservation.

Session Chair

Agenda Item Image
Sally Fuik-burgemeestre
Phd Candidate
Deakin University

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