A5029840405- Wildlife Ecology and Conservation
- Data Analysis with R
- Marine animal studies overview
- Wildlife-Road Interactions and Conservation
- Bat Biology and Ecology Studies
- Fish Ecology and Management Studies
- Genetic and phenotypic traits in livestock
- Turtle Biology and Conservation
- Avian ecology and behavior
- Animal Behavior and Welfare Studies
- stochastic dynamics and bifurcation
- Species Distribution and Climate Change
- Ion channel regulation and function
- Cardiac electrophysiology and arrhythmias
- Ichthyology and Marine Biology
University of Pretoria
2021-2024
Island Conservation Society
2024
Abstract Background Fine-scale data on animal position are increasingly enabling us to understand the details of movement ecology and dead-reckoning, a technique integrating motion sensor-derived information heading speed, can be used reconstruct fine-scale paths at sub-second resolution, irrespective environment. On its own however, dead-reckoning process is prone cumulative errors, so that estimates quickly become uncoupled from true location. Periodic ground-truthing with aligned location...
The cardiac conduction system in large carnivores, such as the African lion (Panthera leo), represents a significant knowledge gap both veterinary science and electrophysiology. Short QT intervals have been reported from zoo-kept, anaesthetized lions, our goal was to record first ECGs wild, conscious lions roaming freely, compare them zoo-kept under hypothesis that short is unique lions. Macroscopic histological examinations were performed on heart tissue removed nine healthy zoo recorded 15...
Abstract Background Understanding what animals do in time and space is important for a range of ecological questions, however accurate estimates how use challenging. Within the animal-attached tags, radio telemetry (including Global Positioning System, ‘GPS’) typically used to verify an animal’s location periodically. Straight lines are drawn between these ‘Verified Positions’ (‘VPs’) so interpolation space-use limited by temporal spatial resolution system’s measurement. As such, parameters...
The combined use of global positioning system (GPS) technology and motion sensors within the discipline movement ecology has increased over recent years. This is particularly case for instrumented wildlife, with many studies now opting to record parameters at high (infra-second) sampling frequencies. However, detail which GPS loggers can elucidate fine-scale depends on precision accuracy fixes, being affected by signal reception. We hypothesized that animal behaviour was main factor...
Abstract The combined use of Global Positioning System (GPS) technology and motion sensors within the discipline movement ecology has increased over recent years. This is particularly case for instrumented wildlife, with many studies now opting to record parameters at high (infra-second) sampling frequency. However, detail which GPS loggers can elucidate fine-scale depends on precision accuracy fixes, (specifically, location error fix success rate) being affected by signal reception. We...
Using stable isotope analysis of carbon and nitrogen turtle tissues putative prey items, we investigated the diet immature green turtles hawksbill foraging in lagoon Aldabra Atoll, a relatively undisturbed atoll southern Seychelles. offers unique environment for understanding sea ecology. Green mostly consumed seagrass brown algae while mainly mangroves invertebrates. showed dietary shift with size (a proxy age). There was minimal niche overlap between species evidence small-scale site...
Abstract Sea turtles spend the majority of their lives at foraging grounds. These areas are important for population persistence but generally occur in coastal habitats, which under increasing human pressure. Identifying key is therefore an step to understanding critical sea turtle and threats. Isotope ratios ( δ 15 N, 13 C) from skin tissues 90 green Chelonia mydas ) nesting regionally rookery Aldabra Atoll, Seychelles, were analyzed with samples collected during two periods: 51 March...
Abstract Background Understanding what animals do in time and space is important for a range of ecological questions, however accurate estimates how use challenging. Within the animal-attached tags, radio telemetry (including Global Positioning System (GPS)) typically used to verify an animal’s location periodically. Straight lines are drawn between these ‘Verified Positions’ (VPs) so interpolation space-use limited by temporal- spatial resolution system’s measurement. As such, parameters...
Abstract Background Fine-scale data on animal position are increasingly enabling us to understand the details of movement ecology and dead-reckoning, a technique integrating motion sensor-derived information heading speed, can be used reconstruct fine-scale paths at sub-second resolution, irrespective environment. On its own however, dead-reckoning process is prone cumulative errors, so that estimates quickly become uncoupled from true location. Periodic ground-truthing with aligned location...