A5030357711- Animal Ecology and Behavior Studies
- Wildlife Ecology and Conservation
- Avian ecology and behavior
- Yersinia bacterium, plague, ectoparasites research
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Marine and coastal plant biology
- Marine animal studies overview
- Polar Research and Ecology
- Genetic diversity and population structure
- Marine and fisheries research
- Bird parasitology and diseases
- Plant and animal studies
- Marine Biology and Ecology Research
- Biliary and Gastrointestinal Fistulas
- Cardiac Valve Diseases and Treatments
- Livestock and Poultry Management
- Echinoderm biology and ecology
- Remote Sensing and LiDAR Applications
- Ecology and Vegetation Dynamics Studies
- Migration, Ethnicity, and Economy
- Hops Chemistry and Applications
- Bartonella species infections research
- Bat Biology and Ecology Studies
Royal Society for the Protection of Birds
2019-2024
University of Cape Town
2016-2024
Nelson Mandela University
2023
University of KwaZulu-Natal
2014-2015
Abstract Invasive species are one of the greatest drivers biodiversity loss worldwide, and eradication invasive from islands is a highly efficient management strategy. Because operations require large financial investments, uncertainty over magnitude impacts both their removal can impede willingness decision makers to invest in eradication. Such prevalent for long‐lived that display an inherent lag between life stages affected by those used population status assessments. Albatrosses amongst...
Zoanthids cover large patches on the rocky shores of KwaZulu-Natal and northern parts Eastern Cape, South Africa. No molecular identification has been carried out these organisms African shoreline. Zoanthus sansibaricus Carlgren, 1900 Reimer, J. D. (2014). 1900, Occurence Map. Retrieved from http://iobis.org/mapper/?taxon = Zoanthus%20sansibaricus, accessed 9 October 2014. [Google Scholar] a global distribution reported having numerous morphotypes in terms polyp shape, size, colour oral disk...
The use of miniaturized video cameras to study the at-sea behavior flying seabirds has increased in recent years. These allow researchers record several behaviors that were not previously possible observe. However, recorders produce large amounts data and videos can often be time-consuming analyze. We present a new technique using open-source software extract bank angles from bird-borne footage. Bank angle is key facet dynamic soaring, which allows albatrosses petrels efficiently search vast...
Abstract Petrels (Procellariidae) are a highly diverse family of seabirds, many which globally threatened due to the impact invasive species on breeding populations. While predation by cats and rats has led extinction petrel populations, house mice Mus musculus is slower less well documented. However, small burrow‐nesting such as MacGillivray’s prion Pachyptila macgillivrayi , classified endangered because it been extirpated islands in Indian Ocean introduced rodents. We use historic...
Abstract Invasive rodents threaten native species in numerous ecosystems, especially oceanic islands. The House Mouse Mus musculus is the only introduced mammal on sub-Antarctic Gough and Marion Islands. Ample evidence exists of mice preying upon seabird chicks these two islands, but there have been a few reports attacks adult seabirds, none which has fatal. We report first deaths great albatrosses due to mouse attacks. On Island, three Tristan Albatrosses Diomedea dabbenena (Critically...
Abstract A vagrant black-browed albatross Thalassarche melanophris bred with a grey-headed T. chrysostoma on Marion Island at least four times between 2000 and 2009 (and continued to return the colony until 2019). The eggs failed hatch in three breeding attempts, but pair fledged chick 2006/07 season. Genetic sexing identified as female she shared all eight sampled microsatellite alleles chick, whereas social parent did not match chick. fledgling was banded re-sighted its natal 2016 2018,...
Eradicating introduced rodents from islands restores these communities, but operations must mitigate bait uptake by non-target species to ensure adequate coverage, and minimize mortality of species. Ingestion toxic is a recognised risk for scavenging birds, also concern generalist feeders. Gough Island, Tristan da Cunha, in the South Atlantic Ocean, has house mice ( Mus musculus ) that negatively affect island ecosystem. It home endemic globally threatened bunting Rowettia goughensis ), may...
Eradicating introduced rodents from islands restores these communities, but operations must mitigate bait uptake by non-target species to ensure adequate coverage, and minimize mortality of species. Ingestion toxic is a recognised risk for scavenging birds, also concern generalist feeders. Gough Island, Tristan da Cunha, in the South Atlantic Ocean, has house mice ( Mus musculus ) that negatively affect island ecosystem. It home endemic globally threatened bunting Rowettia goughensis ), may...
Pelagic seabirds often nest on islands that are far from productive foraging areas. The Procellariiformes (petrels, shearwaters and albatrosses) among the longest-ranging seabirds; they have several adaptations permit them to efficiently utilize distant areas fast for long periods during incubation (Phillips & Hamer 1999). Giant petrels ( Macronectes spp.) large surface-nesting procellariiforms. They feed both by direct predation scavenging carrion, largest avian predator-scavengers in...
The impacts of invasive house mice Mus musculus have received increasing attention on islands where are the only rodent species. On Gough Island, impact seabirds has increased over past decade, but current population status Critically Endangered Finch Rowettia goughensis is uncertain. Based nest monitoring at high elevation sites in 2009 (n = 37) and 2018 45), we found mean survival 55% both years a fecundity 1.31 ± 0.69 fledglings per pair 2018. Density estimates from territory mapping were...
Abstract Petrels (Procellariidae) are a highly diverse family of seabirds, many which globally threatened due to the impact invasive species on breeding populations. While predation by cats and rats has led extinction petrel populations, house mice Mus musculus is slower less well documented. However, small burrow-nesting such as MacGillivray’s prion Pachyptila macgillivrayi, classified endangered because it been extirpated islands in Indian Ocean introduced rodents. We use historic...
The Tristan da Cunha archipelago comprises three main islands: Tristan, Inaccessible and Nightingale at 37ºS 12ºW, with Gough Island (40ºS 10ºW) the only other temperate oceanic island in South Atlantic Ocean (Ryan 2007). are important breeding sites for 25 species of seabirds 2008; Ryan et al. 2014; 2015; Robertson 2016), a further 30 non-breeding have been reported from islands 2007; Visser 2009; 2010). We report additional based on observations 2017 to 2019.
Eradicating introduced rodents from islands restores these communities, but operations must mitigate bait uptake by non-target species to ensure adequate coverage, and minimize mortality of species. Ingestion toxic is a recognised risk for scavenging birds, also concern generalist feeders. Gough Island, Tristan da Cunha, in the South Atlantic Ocean, has house mice ( Mus musculus ) that negatively affect island ecosystem. It home endemic globally threatened bunting Rowettia goughensis ), may...