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Application of the Lake Habitat Survey method on the tropical Malilangwe reservoir, south-eastern lowveld, Zimbabwe
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: T Dalu --- Department of Biological Sciences, Zimbabwe B Clegg --- , Zimbabwe T Nhiwatiwa --- Department of Biological Sciences, ZimbabweThe Lake Habitat Survey (LHS) method was developed to assess the ecological integrity of the physical habitat around lake and reservoir ecosystems, as well as to determine the magnitude of human pressure on lake systems. The LHS method has not... -
Processes influencing the population dynamics and conservation of African penguins on Dyer Island, South Africa
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: K Ludynia --- Marine Research Institute, Department of Biological Sciences, South Africa LJ Waller --- Western Cape Nature Conservation Board, South Africa RB Sherley --- Marine Research Institute, Department of Biological Sciences, South Africa F Abadi --- Animal Demography Unit, Department of Biological Sciences, South Africa Y Galada --- Marine Research Institute, Department of Biological Sciences, South Africa D Geldenhuys --- Western Cape Nature Conservation Board, South Africa RJM Crawford --- Animal Demography Unit, Department of Biological Sciences, South Africa LJ Shannon --- Marine Research Institute, Department of Biological Sciences, South Africa A Jarre --- Marine Research Institute, Department of Biological Sciences, South AfricaDyer Island, South Africa, supported the largest African penguin Spheniscus demersus colony in 1979 (22 655 breeding pairs), but population dynamics of the species have not followed the trends of adjacent colonies in years of high fish abundance or shifts... -
Endotracheal tube cuff pressures in adult patients undergoing general anaesthesia in two Johannesburg academic hospitals
Item type: Journal Article • Journal: Southern African Journal of Anaesthesia and Analgesia • Authors: L Gilliland --- Faculty of Health Sciences, Department of Anaesthesiology, South Africa H Perrie --- Faculty of Health Sciences, Department of Anaesthesiology, South Africa J Scribante --- Faculty of Health Sciences, Department of Anaesthesiology, South AfricaBackground: Endotracheal tube (ETT) cuff pressure commonly exceeds the recommended range of 20–30 cm H₂O during anaesthesia. A set volume of air will not deliver the same cuff pressure in each patient and the pressure exerted by the ETT cuff can... -
Intraspecific morphological divergence in two Cichlid species from Benin
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: Luke M Bower --- Program in Ecology and Evolutionary Biology and Department of Wildlife and Fisheries Sciences, USA Laith A Jawad --- Freelance Fish Biodiversity Consultant, New Zealand Pierre M Gnohossou --- Département d’Aménagement et Gestion de Ressources Naturelles, Republic of Benin Ayoko Géraldine Tossou --- Département d’Aménagement et Gestion de Ressources Naturelles, Republic of BeninSelection on morphological traits can vary across the range of species, inducing a mosaic of phenotypes across populations. Intraspecific morphological divergence had been demonstrated for many fish groups inhabiting environments with varying abiotic or biotic selective pressures. Such intraspecific phenotypic... -
A socio-ecological systems approach towards future research for the restoration, conservation and management of southern African estuaries
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: JB Adams --- DST/NRF Research Chair in Shallow Water Ecosystems, South Africa AK Whitfield --- South African Institute for Aquatic Biodiversity (SAIAB), South Africa L Van Niekerk --- DST/NRF Research Chair in Shallow Water Ecosystems, South AfricaThis Reflections article highlights the growing pressures that southern African estuaries are experiencing in the Anthropocene, as identified by the research presented in this Special Medal Issue. Estuaries are exposed to multiple stressors, and their responses to climate change are... -
The mediating role of transformational leadership in the relationship between institutional pressures and collaboration with commercialization of university research output: A pilot study
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Gregory Tweheyo --- Bustema University, Uganda Ernest Abaho --- Makerere University Business School, Uganda Anju M. Verma --- Texila American University, Guyana Ibrahim Musenze --- Bustema University, UgandaThe purpose of this study is to lay emphasis on Uganda’s universities in light of the examination of how institutional pressures and collaboration influence the commercialization of university research output with the mediating role of transformational leadership. Data were collected... -
Yellow-billed Kite Milvus aegyptius nesting dynamics and breeding success across a human-modified landscape
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Roger N Porter --- , William W Howells --- , Ingrid B Weiersbye --- , South Africa Ben Hoffman --- University of KwaZulu-Natal, South Africa Sean N Porter --- Oceanographic Research Institute (ORI), South AfricaAnthropogenic habitat transformation is one of the leading causes of biodiversity decline. Migratory birds, particularly many raptor species, are increasingly threatened by global environmental change. We investigated the nesting dynamics and potential determinants of breeding success in a population of...