A5038133846- Marine animal studies overview
- Marine and coastal plant biology
- Polar Research and Ecology
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Ichthyology and Marine Biology
- Identification and Quantification in Food
- Fish Ecology and Management Studies
- Conservation, Biodiversity, and Resource Management
- Coastal and Marine Management
- Food Supply Chain Traceability
- Insect and Arachnid Ecology and Behavior
- Coral and Marine Ecosystems Studies
- Indigenous Studies and Ecology
- Avian ecology and behavior
- Innovation and Socioeconomic Development
- Geology and Paleoclimatology Research
- Plant and animal studies
- Arctic and Russian Policy Studies
- Global trade, sustainability, and social impact
- Fish Biology and Ecology Studies
- Marine and fisheries research
- Turtle Biology and Conservation
- Freshwater macroinvertebrate diversity and ecology
- Agricultural risk and resilience
Nelson Mandela University
2013-2023
Marine Stewardship Council
2016-2023
South African National Parks
2013-2018
University of Pretoria
2000-2017
Iziko Museums of South Africa
2010-2016
Scientific Services
2015-2016
Mammal Research Institute
2014
Stellenbosch University
2009
British Antarctic Survey
2001
Although humpback whales are among the best-studied of large whales, population boundaries in Southern Hemisphere (SH) have remained largely untested. We assess structure SH using 1,527 samples collected from at fourteen sampling sites within Southwestern and Southeastern Atlantic, Indian Ocean, Northern Ocean (Breeding Stocks A, B, C X, respectively). Evaluation mtDNA migration rates was carried out under different statistical frameworks. Using all genetic evidence, results suggest...
Southern Hemisphere humpback whales (Megaptera novaeangliae) generally undertake annual migrations from polar summer feeding grounds to winter calving and nursery in subtropical tropical coastal waters. Evidence for such arises seasonality of historic whaling catches by latitude, Discovery natural mark returns, results satellite tagging studies. Feeding is believed be limited the southern region, where Antarctic krill (Euphausia superba) has been identified as primary prey item....
Abstract von der Heyden, S., Barendse, J., Seebregts, A. and Matthee, C. 2010. Misleading the masses: detection of mislabelled substituted frozen fish products in South Africa. – ICES Journal Marine Science, 67: 176–185. Mislabelling poses a threat to sustainability seafood supply chains and, when frequent, can significantly affect conservation efforts. Here we identify most popular African market through consumer retailer surveys data gathered by sustainable campaign. Of these species,...
The migration of Southern Hemisphere humpback whales Megaptera novaeangliae between their feeding and breeding areas has thus far been considered a highly predictable seasonal event. However, previous observations on the humpbacks that pass through nearshore waters west coast South Africa have revealed deviations from behaviour seasonality expected during typical migration. This 'anomaly' is hypothesised to be associated with prey availability in region. Shore-based July 2001 February 2003...
Site fidelity is common among migratory cetaceans, including humpback whales (Megaptera novaeangliae). In the Northern Hemisphere it has been found that to whale feeding grounds transferred maternally but this never shown for species in Southern Hemisphere. We examined a unique area off west South Africa using resighting data of 68 individually identified by means photographic (tail flukes and dorsal fins) and/or molecular methods (microsatellite genotyping) over an 18 year span. short-term...
It has been suggested previously that the presence and abundance of indigenous species have a marked influence on likelihood invasion community. also such biotic resistance negligible outcome an invasion, but abiotic characteristics environment being invaded are more important. The latter claimed to be especially important islands Southern Ocean. In order test these competing hypotheses we examined distribution introduced springtails across 13 habitats, which differ considerably in...
Humpback whales Megaptera novaeangliae found off west South Africa (WSA) are known to display an atypical migration that may include temporary residency and feeding during spring summer. At a regional scale there is uncertainty about how these relate the greater West African Breeding Stock B as whole, with evidence both for against its division into two substocks. A database containing sighting information of humpback intercepted by boat in WSA region from 1983 2008 was compiled. It included...
Stewardship is a popular term for the principles and actions aimed at improving sustainability resilience of social-ecological systems various scales in different contexts. Participation stewardship voluntary, based on values altruism long-term benefits. At global scale, ‘earth stewardship’ viewed as successor to earlier natural resource management systems. However, South Africa, narrowly applied biodiversity conservation agreements private land. Using broader definition stewardship, we...
Body size was measured for 67 of the approximately 120 invertebrate species on Marion Island. These include more than 60% 29 acarine families, and 80% remaining terrestrial species. Thus data are regarded as representative entire fauna sub-Antarctic, Length–mass fresh–dry mass relationships were calculated orders, families to provide a means estimating body parameters in collections those which known from only few specimens. A comparison regression slopes different taxonomic ranks indicates...
Abstract The southern right whale's ( Eubalaena australis ) demography, occurrence, habitat use, and behavior off South Africa are known predominantly from an ongoing aerial survey data set that started in 1971. fixed timeframes of these surveys their geographical bias towards south coast nursery areas have constrained our knowledge about the seasonal distribution elsewhere. We present shore‐based observations tracking whales at Saldanha Bay on west (2001–2003) reveal a near year‐round...
Abstract Conservation targets are useful policy tools, indicating a degree of political intent and allowing purposeful conservation planning. However, target setting implementation often occur at different scales. A largely unmet challenge is to establish mutual feedbacks between national‐scale local‐scale ecological realities management actions. Freshwater in South Africa has been advanced through the participatory freshwater (20% each ecosystem type). This paper presents response agency,...
Humpback whales ( Megaptera novaeangliae ) from a breeding ground off Gabon (0–4°S) and migratory corridor/feeding on the west coast of South Africa (WSA; 33°S) differ genetically in catch histories. Interpretation population structure is hampered by lack data intervening 3,500 km coastline or to north Gabon. Here we collate all relevant nongenetic humpback Namibia (∼23°S) 2005 2012 compare these with corresponding (2000–2006) WSA (1983–2008). Data include photographic catalogs dorsal fin...
Sense of place (SoP) refers to the meanings and values that people attach places. The concept can be used frame how engage or form a connection with natural environment. At sensory level, SoP is influenced by people’s visual experiences, which in turn linked viewsheds. Viewsheds transformed, either abruptly (e.g. infrastructure development such as wind turbines) more gradually non-native trees invading landscape). In this study, we focus on Garden Route National Park explore potential...
Studies on sub-Antarctic insects have suggested that species inhabiting the epilithic biotope (cryptogam-dominated habitats) exhibit higher habitat specificity than those of vegetated (habitats dominated by vascular plants), and this is partially consequence recolonization latter migration from former, which acted as glacial refugia during Neogene. Here, Acari used to independently test idea. To do so, 17 different habitats belonging both biotopes were quantitatively sampled Marion Island....
Fishery certification is increasingly employed as a multi-stakeholder, market-based mechanism to promote sustainability of fisheries. Preparing for, and achieving continues deliver tangible improvements benefits fisheries, but the number certified fisheries from Africa remains low. Some factors that constrain in region include limited data assess manage open access nature many overfishing, poor management, inadequate enforcement, low demand for seafood. To overcome these constraints, several...
Non-native vegetation in the riparian zone impacts on water temperatures, flow patterns, degree of shading, channel modification, and changes to natural sediment loads. Freshwater ecosystems Garden Route Initiative planning domain are particular conservation value, because rich Gondwanaland relict aquatic macroinvertebrate fauna found rivers there, which vulnerable thermal changes. Data were collected during 2013 2014 at 19 sites seven river systems between George Knysna southern Cape, South...