A5087207762- Freshwater macroinvertebrate diversity and ecology
- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Lepidoptera: Biology and Taxonomy
- Hydrology and Sediment Transport Processes
- Species Distribution and Climate Change
- Fish biology, ecology, and behavior
- Invertebrate Taxonomy and Ecology
- Fish Biology and Ecology Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Parasite Biology and Host Interactions
- Fossil Insects in Amber
- Hymenoptera taxonomy and phylogeny
- Aquatic Ecosystems and Biodiversity
- Insect Resistance and Genetics
- Diptera species taxonomy and behavior
- Wildlife Ecology and Conservation
- Ecology and Vegetation Dynamics Studies
- Entomopathogenic Microorganisms in Pest Control
- Forensic Entomology and Diptera Studies
- Identification and Quantification in Food
- Environmental DNA in Biodiversity Studies
- Orthoptera Research and Taxonomy
- Environmental Science and Water Management
- South Asian Studies and Conflicts
Rhodes University
2007-2020
South African Institute for Aquatic Biodiversity
2020
Albany Research Institute
1988-2002
National Museum
1996
Council for Scientific and Industrial Research
1985-1986
A collection of microcaddisflies from sites on the Cuito, Cuanavale, Cuembo, Cuando, Cubango, and Lungue Bungo Rivers in Angola has yielded seven new species led to records for a further five species. The include Hydroptila cuembica sp. nov., moxica Oxyethira palisada Orthotrichia ferreirae Or. meyi mlamboi another which we erect genus, Aenigmatrichia asymmetrica gen. et nov. are Catoxyethira kunenica Mey & de Moor 2019, brigittae Gibon 1987b, cruciata Ulmer 1912, maoae Gibon, Guenda,...
We investigated the relative importance of dispersal and vicariance in forming Madagascar insect fauna, sequencing approximately 2300 bp from three rRNA gene regions to investigate phylogeny Afrotropical small minnow mayflies (Ephemeroptera: Baetidae). Six lineages contained trans-oceanic sister taxa, variation genetic divergence between taxa revealed relationships that range very recent ancient vicariance. Dispersal was most frequent species spend larval stage standing water, adding...
Abstract Data on the hydrology, chemistry, and benthic invertebrates of Great Fish River prior to opening Orange River/Fish interbasin water transfer scheme in 1977, are compared with similar data for post conditions. As a result once irregular seasonal flow has now become perennial. The mean annual runoff upper river increased by between 500 800 per cent. Mainly because abstractions irrigation, discharge lower changed little, but variation been considerably reduced. inflow low salinity from...
Abstract Fish predation is one of the driving forces freshwater invertebrate community structures, with alien predators having a pronounced effect. A quantitative assessment aquatic invertebrates in Wit River, Sundays River catchment, Eastern Cape, South Africa, was undertaken to assess impact fish Micropterus salmoides on their relative abundance and structure. Communities stones-in-current marginal vegetation biotopes were sampled presence absence M. late summer (February–April) 2008....
Abstract Flow patterns in the Great Fish River Eastern Cape province of South Africa have changed from being seasonal, with predictable no‐flow periods during winter, to perennial following completion an inter‐basin transfer scheme 1977 provide a regular supply irrigation water. Simulium chutteri (Diptera: Simuliidae) consequently became problem species pestilential proportions, due increased flow volumes and current velocities favouring this species. In study, aquatic invertebrates were...
The diet of 745 Oreochromis mossambicus (Peters) less than 0,5 up to 2000 g wet mass, in Hartbeespoort Dam, was determined from stomach content analysis. Samples fish were selected cover a whole annual cycle. Small fed initially on zoobenthos and zooplankton, but with mass over 4 increasingly Microcystis aeruginosa Kutzing detritus until these food items formed the dominant source O. 8 g. Some cannibalism encountered 64 summer months. ratio intestinal length total ranged 0,58 smaller 11,02...
Baetis harrisoni Barnard is a mayfly frequently encountered in river studies across Africa, but the external morphological features used for identifying nymphs have been observed to vary subtly between different geographic locations. It has associated with wide range of ecological conditions, including pH extremes 2.9–10.0 polluted waters. We present molecular study genetic variation within B. 21 rivers its distribution southern Africa. Four gene regions were examined, two mitochondrial...
Morphometric studies show that there are seven larval instars in Simulium chutteri. A guide for separating of S. chutteri is included. Seasonal and sexual size variation seasonal biomass larvae pupae statistically analysed discussed. Water temperature a major factor determining pupal duration the stage. Growth follows geometric pattern agreement with previous works on other species. An overlap larger smaller at same developmental stage resulted from coexistence early winter late summer...
Roux, D., F. De Moor, J. Cambray and H. Barber-James 2002. Use of landscape-level river signatures in conservation planning: a south african case study. Conservation Ecology 6(2): 6. https://doi.org/10.5751/ES-00413-060206
SUMMARY Because of their small size and limited mobility aquatic insects are seldom recognized as invasive species only where verifiable historical data exist can introductions exotic be confirmed. Records some generally considered cosmopolitan could in fact undocumented introductions. Of the entirely orders Odonata noted regular invaders. Trichoptera, Ephemeroptera, Plecoptera Megaloptera all poor colonizers. In contrast, Hemiptera, Diptera Coleoptera have many which show excellent...
Abstract Elevated, more constant flows characterize the current flow regime of Great Fish River (Eastern Cape province, South Africa) following completion an interbasin transfer scheme (IBT) in 1977, where prior to this winter months were often characterized by zero flows. Changes aquatic macroinvertebrate communities, and particular outbreaks pest blackfly Simulium chutteri Lewis (Diptera: Simuliidae) have been documented response these altered Integrated control measures advocated based on...
Abstract Taeniochauliodes is the most common and widely distributed fishfly genus in South Africa, with one historically recognized valid species ochraceopennis Esben‐Petersen. The present systematic revision of has found that this consists at least eight species: T. angustus sp.n. , attenuatus barnardi fuscus minutus natalensis Description all new a redescription esbenpeterseni comb.n . & stat.rev are made. These have relatively narrowly confined distributions. An interspecific...
Abstract The proposed construction of a second hydroelectric power-generating dam on the Cunene (Kunene) River Namibia-Angola border, more than 100km downstream Ruacana power plant, will have major influence aquatic biota this river. In order to assess potential impact impoundment detailed inventory in river prior development was needed. Unfortunately presently does not represent an entirely undisturbed system as operation station since 1970 has had long-term effect its biota. low-flow...