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  1. Effect of large weirs on abundance and diversity of migratory <em>Labeobarbus</em> species in tributaries of Lake Tana, Ethiopia

    Effect of large weirs on abundance and diversity of migratory Labeobarbus species in tributaries of Lake Tana, Ethiopia

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: G Shewit --- Fisheries, Wetlands and Wildlife Management Department, Ethiopia A Getahun --- Department of Zoological Sciences, Ethiopia W Anteneh --- Biology Department, Ethiopia B Gedif --- Institute of Disaster Risk Management and Food Security Studies, Bahir Dar University, Ethiopia B Gashu --- Fisheries, Wetlands and Wildlife Management Department, Ethiopia B Tefera --- Agricultural Economics Department, Ethiopia Z Berhanie --- Agricultural Economics Department, Ethiopia D Alemaw --- Faculty of Civil and Water Resource Engineering, Ethiopia
    Lake Tana has a remarkable fish diversity, including 17 endemic Labeobarbus species, of which nine spawn in the inflowing rivers. Three of the migratory species are threatened, namely the endangered Labeobarbus macrophtalmus and the vulnerable L. acutirostris and L. platydorsus...
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  2. Population trends of resident and migrant West African bird species monitored over an 18-year period in central Nigeria

    Population trends of resident and migrant West African bird species monitored over an 18-year period in central Nigeria

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Joy Akpanta Ishong --- AP Leventis Ornithological Research Institute, Nigeria Joseph K Afrifa --- AP Leventis Ornithological Research Institute, Nigeria Soladoye B Iwajomo --- AP Leventis Ornithological Research Institute, Nigeria Justus P Deikumah --- AP Leventis Ornithological Research Institute, Nigeria Samuel T Ivande --- AP Leventis Ornithological Research Institute, Nigeria Will Cresswell --- AP Leventis Ornithological Research Institute, Nigeria
    Almost no systematic monitoring of bird population trends occurs in West Africa, despite rapid human population increase, habitat change, and climate change, making conservation planning problematic. We monitored bird population trends using constant-effort mist netting, in a newly protected area...
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  3. A comparison of migrant and resident bird population changes in South Africa using citizen science data: trends in relation to Northern Hemisphere distribution

    A comparison of migrant and resident bird population changes in South Africa using citizen science data: trends in relation to Northern Hemisphere distribution

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Alan TK Lee --- University of KwaZulu-Natal, South Africa Sophie AJ Hammer --- , United Kingdom
    Many species of migratory birds have been declining on the Palearctic-African flyways in recent decades due to human population pressure and land-use intensification. Models predict that the declining trends of migratory birds will continue into the foreseeable future across much...
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  4. Using generalised additive models to visualise the annual cycle of primary feather moult patterns

    Using generalised additive models to visualise the annual cycle of primary feather moult patterns

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Rebecca R Irons --- University of Cape Town, South Africa Alan TK Lee --- University of Cape Town, South Africa Robert L Thomson --- University of Cape Town, South Africa Birgit Erni --- University of Cape Town, South Africa
    Moult is a vital but energy-demanding event in a bird's phenological cycle. Primary moult is the shedding of old feathers and the regeneration of new flight feathers to maintain efficient functioning of these critical structures. Life history events, such as...
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