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Host-specificity testing of Puccinia xanthii var. parthenii-hysterophorae, a potential biocontrol agent for Parthenium hysterophorus in South Africa
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Estianne Retief --- , South Africa Khayalethu Ntushelo --- , South Africa AlanR Wood --- , South AfricaFollowing its introduction into Australia, the rust fungus Puccinia xanthii var. parthenii-hysterophorae has played an important role in the integrated approach to manage Parthenium hysterophorus. The rust was imported from Australia and established within quarantine facilities in South Africa. Supplementary... -
Sterol-specific membrane interactions with the toxins from Karlodinium micrum (Dinophyceae) — a strategy for self-protection?
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: JR Deeds AR PlaceThe lipophilic toxins from Karlodinium micrum, KmTX, have negative effects on several co-occurring phytoplankton species, yet appear to have no effect on K. micrum itself. One of these compounds, KmTX2, has differing toxicity towards eukaryotic membranes with differing sterol compositions... -
Corruption, transaction costs, and innovation in Africa
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Laura Barasa --- School of Economics, KenyaThis paper examines the relationship between corruption, transaction costs as measured by asset specificity, and innovation in Africa. We hypothesize that in the context of developing countries in Africa, corruption is positively associated with innovation. In addition, we hypothesize that... -
Crayfish, catfish and snails: the perils of uncontrolled biological control
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: BE Marshall --- Great North Road, New ZealandA recent proposal that the Australian redclaw crayfish Cherax quadricarinatus and hybrid catfish could potentially control the snail hosts of schistosomiasis has been criticised on the grounds that crayfish pose a severe threat to aquatic ecosystems into which it might... -
Host selection and notes on the distribution of Chonopeltis australis Boxshall, 1976 in southern Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: LAM Neethling --- , South Africa A Avenant-Oldewage --- , South AfricaThe parasite Chonopeltis australis Boxshall, 1976 has been recorded from tributaries of the Orange-Vaal River System. It is host-specific, preferring the cyprinids Labeo capensis (Smith, 1841) and Labeo umbratus (Smith, 1841). Sampling was conducted between spring 2016 and autumn 2019... -
Validity of Mini Nutritional Assessment tool among an elderly population in Yeka sub-city, Addis Ababa, Ethiopia
Item type: Journal Article • Journal: South African Journal of Clinical Nutrition • Authors: Mesfin Agachew Woldekidan --- , Ethiopia Demewoz Haile --- , Ethiopia Bilal Shikur --- , Ethiopia Seifu Hagos Gebreyesus --- , EthiopiaBackground: The widely used nutritional assessment tool used for the elderly includes the Mini Nutritional Assessment (MNA) and Mini Nutritional Assessment–Short Form (MNA-SF) tool. These tools have not been evaluated for their validity and reliability among the elderly population of... -
Host specificity of the Pygmy Falcon Polihierax semitorquatus: a review
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: H Dieter Oschadleus --- , South AfricaThe Pygmy Falcon Polihierax semitorquatus does not build its own nest but is an obligate user of the nests of colonial birds for roosting and breeding. The nests of various weavers and starlings have been listed, suggesting a wide range... -
Contribution of ankle-brachial index measurement in screening for arteriopathy obliterans of the lower limbs in type 2 diabetics
Item type: Journal Article • Journal: Journal of Endocrinology, Metabolism and Diabetes of South Africa • Authors: Sitraka Angelo Raharinavalona --- , Madagascar Rija Eric Raherison --- , Madagascar Thierry Razanamparany --- , Madagascar Dally Rasoaniana --- , Madagascar Radonirina Lazasoa Andrianasolo --- , Madagascar Andrinirina Dave Patrick Rakotomalala --- , Madagascar -
New host–parasite associations of Cymothoidae (Crustacea, Isopoda) infesting elasmobranch fishes in Tunisian waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: F Youssef --- El Manar University, Tunisia B Benmansouand --- El Manar University, Tunisia Z Ramdane --- University of Bejaia, AlgeriaBetween 2015 and 2020, 2 092 specimens of cartilaginous fishes (Chondrichthyes: Elasmobranchii) belonging to eight species and five genera were sampled along the Tunisian coast and examined for their cymothoid parasites, Among the eight examined elasmobranch species, only three were... -
Patterns of fish distribution in tropical rock pools at Príncipe Island, Gulf of Guinea
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Azevedo e Silva --- University of Lisbon, Portugal AJ Almeida --- University of Lisbon, Portugal M Cravo --- University of Lisbon, Portugal MP Pais --- University of Lisbon, Portugal Y Santos --- , São Tomé e Príncipe J Paula --- University of Lisbon, PortugalLittle is known about the ichthyofauna from intertidal rock pools of the west coast of Africa, especially in the Gulf of Guinea. Rock pools are characteristic habitats of the intertidal zone of structurally complex rocky shores, adding important niche space... -
Distribution and host preference of a potential biocontrol agent with a new association for the alien water lily Nymphaea mexicana in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MK Reid --- Rhodes University, South Africa GF Sutton --- Rhodes University, South Africa JA Coetzee --- Rhodes University, South Africa LA Gettys --- University of Florida, United States MP Hill --- Rhodes University, South AfricaAlthough classical biological control makes use of natural enemies from the native range of an invasive alien species, there are occurrences in which species in the invaded range expand their host range and form new associations with the invader. Bagous...