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Abyssal scavenging demersal fauna at two areas of contrasting productivity on the Subantarctic Crozet Plateau, southern Indian Ocean
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: NJ Cousins --- Oceanlab, UK T Horton --- National Oceanography Centre, Southampton, UK BD Wigham --- Dove Marine Laboratory, School of Marine Science and Technology, UK PM Bagley --- Oceanlab, UKThe Crozet Plateau is situated below typical high-nutrient, low-chlorophyll (HNLC) waters of the southern Indian Ocean. The area to the east of the Crozet Islands experiences high levels of surface productivity during the austral summer due to natural iron enrichment... -
Estimating scavenger and search bias for collision fatality surveys of large birds on power lines in the Karoo, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Maurice Schutgens --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Jessica M Shaw --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South Africa Peter G Ryan --- DST/NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology, South AfricaBird collision mortality associated with power lines is a global conservation challenge, but periodic carcass counts along power lines underestimate actual mortality because of survey biases. We conducted a scavenger trial over 90 days and three observer detection trials after... -
Congregations of wintering Egyptian Vultures Neophron percnopterus in Afar, Ethiopia: present status and implications for conservation
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Volen Arkumarev --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, Bulgaria Vladimir Dobrev --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, Bulgaria Yilma D Abebe --- Ethiopian Wildlife and Natural History Society, Ethiopia Georgi Popgeorgiev --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, Bulgaria Stoyan C Nikolov --- Bulgarian Society for Protection of Birds/BirdLife Bulgaria, BulgariaThe Endangered Egyptian Vulture Neophron percnopterus congregates in communal roosts in the wintering areas and where food availability is high, where even a single threat might lead to substantial population declines. Thus, more research on the congregation sites is needed... -
Hooded Vultures Necrosyrtes monachus nearly extirpated from Edo State, Nigeria: a report on the avian scavenger community
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Esther Nosazeogie --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Talatu Tende --- AP Leventis Ornithological Research Institute, University of Jos, Nigeria Ara Monadjem --- Department of Biological Sciences, SwazilandAvian scavengers, by feeding on carrion and other organic matter, provide critical ecosystem services. Vultures, the only obligate avian scavengers, have reportedly experienced massive population declines in Africa yet current knowledge regarding their status in most West African countries is... -
Urban bird trends in a rapidly growing tropical city
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Dan Chamberlain --- Department of Life Sciences and Systems Biology, Italy Micheal Kibuule --- Department of Zoology, Uganda Roger Q Skeen --- Nature Uganda, Uganda Derek Pomeroy --- Department of Environmental Management, UgandaLong-term studies of urban birds are relatively scarce, especially in Africa. We analysed trends in species richness and bird species occurrence over a 32-year period in Kampala, Uganda, in order to assess changes in the bird community in a period... -
Marabou Stork Leptoptilos crumenifer breeding in the greater Gorongosa landscape, Mozambique
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Marc Stalmans --- , Mozambique Andre Botha --- , South Africa Teague Scott --- , United States Gregory Kaltenecker --- , United States Ara Monadjem --- , EswatiniThe Marabou Stork Leptoptilos crumenifer is a large wading bird that occurs extensively throughout sub-Saharan Africa in savanna and wetland habitats. Despite its widespread occurrence in southern Africa, the number of known breeding localities and the numbers of nests are...