Search
Search results for
We found
10 results for you
-
THE OCCURRENCE OF MICROCYSTIS AERUGINOSA IN THE BOTTOM SEDIMENTS OF A SHALLOW EUTROPHIC PAN
Item type: Journal Article • Journal: Journal of the Limnological Society of Southern Africa • Authors: M. Tow --- Department of Botany and Microbiology, South AfricaSediment samples, collected from Jan Smuts Park Dam in Brakpan, Transvaal, during winter months were incubated in culture medium in the laboratory and found to contain viable Microcystis aeruginosa Kütz. emend. Elenkin colonies. The results obtained, indicate that the alga... -
Wintering seabirds in West Africa: foraging hotspots off Western Sahara and Mauritania driven by upwelling and fisheries
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: CJ Camphuysen J van der MeerCold-water upwelling supports abundant and diverse faunas. Upwelling off Mauritania has been highlighted as being important for seabirds, but very few systematic offshore surveys have been conducted in that region. Mauritanian waters are increasingly targeted by commercial fisheries along the... -
Modelling habitat suitability in the Aquatic Warbler wintering ground Djoudj National Park area in Senegal
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Cosima Tegetmeyer --- Institute of Botany and Landscape Ecology, Germany Annett Frick --- LUP GmbH, Germany Nina Seifert --- Zoological Institute and Museum, GermanyThe only well-studied wintering ground of the globally threatened Aquatic Warbler Acrocephalus paludicola is the ‘Djoudj area’ in Senegal. This study identifies potential Aquatic Warbler habitats within that area and gives an estimate of the size of the local wintering... -
Satellite tracking of a young Steppe Eagle from the United Arab Emirates during two spring and autumn migrations
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Sàlim Javed --- Environment Agency – Abu Dhabi, United Arab Emirates Shahid Khan --- Environment Agency – Abu Dhabi, United Arab Emirates Junid Nazeer --- Environment Agency – Abu Dhabi, United Arab Emirates Shakeel Ahmed --- Environment Agency – Abu Dhabi, United Arab Emirates Abdullah Al Hammadi --- Environment Agency – Abu Dhabi, United Arab Emirates Eissa Al Hammadi --- Environment Agency – Abu Dhabi, United Arab EmiratesFollowing recovery and successful rehabilitation, a young Steppe Eagle Aquila nipalensis was tagged with a 45 g GPS satellite transmitter to track its migration and identify potential wintering and summering areas of the species passing through the United Arab Emirates... -
New evidence for a South Atlantic stock of humpback whales wintering on the Northwest African continental shelf
Item type: Journal Article • Journal: African Zoology • Authors: Koen Van Waerebeek --- COREWAM-Senegal, Musée de la Mer, Senegal Abdoulaye Djiba --- COREWAM-Senegal, Musée de la Mer, Senegal Jens-Otto Krakstad --- Institute of Marine Research, Norway Abdellahi Samba Ould Bilal --- Institut Mauritanien des Recherches Océanographiques et des Pêches (IMROP), Mauritania Idrissa L. Bamy --- Centre National des Sciences Halieutiques de Boussoura (CNSHB), Guinea Amadeu Almeida --- Centro de Investigaç ão Pesqueira Aplicada (CIPA), Guinea-Bissau Ebou Mass Mbye --- Fisheries Department, The GambiaSeventeen confirmed and four probable sightings of humpback whales, Megaptera novaeangliae, were documented from platform-of-opportunity Research Vessel (R/V) Dr. Fridtjof Nansen in a passing-mode visual survey of continental shelf waters between Conakry and Cap Vert Peninsula (Dakar), 21 October -5... -
Habitat characteristics of wintering Wood Warbler Phylloscopus sibilatrix in the Centre Region of Cameroon: conservation implications
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Taku Awa --- Laboratory of Applied Biology and Ecology, Faculty of Science, Cameroon Tsi A Evaristus --- Department of Fundamental Science, Higher Technical Teacher Training College, Cameroon Robin C Whytock --- School of Biological and Environmental Sciences, UK Tsetagho Guilain --- Laboratory of Applied Biology and Ecology, Faculty of Science, Cameroon John Mallord --- Centre for Conservation Science, Royal Society for the Protection of Birds, UKPopulations of many Afro-Palearctic birds have declined, with those wintering in sub-Saharan Africa, such as Wood Warbler Phylloscopus sibilatrix, particularly affected. In this study we investigated the relationship between habitat characteristics and Wood Warbler presence/absence in the Centre Region of... -
Winter site use by Afro-Palearctic migrants in Ghana: site persistence and densities of Willow Warbler, Pied Flycatcher, Melodious Warbler and Common Redstart
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kasper Thorup --- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Denmark Iben Hove Sørensen --- DOF BirdLife Denmark, Denmark Mikkel Willemoes --- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Denmark Mathilde Lerche-Jørgensen --- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Denmark Jon Fjeldså --- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Denmark Anders P Tøttrup --- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Denmark Erik Mandrup Jacobsen --- DOF BirdLife Denmark, Denmark Andrew H Reeve --- Center for Macroecology, Evolution and Climate, Natural History Museum of Denmark, Denmark Robert Oteng-Appau --- Ghana Wildlife Society, Ghana Augustus Asamoah --- Ghana Wildlife Society, Ghana Thomas Lehmberg --- DOF BirdLife Denmark, DenmarkLittle is known about the variation within and among species of long-distance migrants in behavioural strategies and habitat choice on their non-breeding grounds. We report results from regular ringing operations carried out during the winter seasons 2009–2013 and transect counts... -
Investigating the influence of the extreme Indian Ocean Dipole on the 2020 influx of Red-necked Phalaropes Phalaropus lobatus in Kenya
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Raphaël Nussbaumer --- , Kenya Mathieu Gravey --- , Switzerland Améline Nussbaumer --- , Kenya Colin Jackson --- , KenyaOcean currents have wide-ranging impacts on seabird movement and survival. By extension, the extreme oscillations they are subject to, such as extreme Indian Ocean Dipole (IOD) events, can also be expected to dramatically influence seabird populations. This study links the... -
Cinereous Vulture Aegypius monachus movements between Europe and Africa show a pattern across the Strait of Gibraltar
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Juan Ramírez --- Malaga University, Spain Javier Elorriaga --- , Spain Andrés de la Cruz --- Spanish Institute of Oceanography (IEO), Spanish National Research Council (CSIC), SpainThe biology of the Cinereous Vulture Aegypius monachus is well known across its breeding range, and the species’ dispersal and movements throughout Europe are widely recorded. However, the ecology of this vulture south of the Mediterranean Sea has been overlooked,... -
Surveys of Sooty Falcons Falco concolor wintering in Madagascar in 2023 and 2024
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Gilbert Razafimanjato --- , Madagascar Michael J McGrady --- International Avian Research, Austria Radoniaina Razafiherison --- , Madagascar Heritiana J Randriamanantena --- , Madagascar Marius PH Rakotondratsima --- , Madagascar Idéaly J Dinafitiavana --- , Madagascar Russell Thorstrom --- World Center for Birds of Prey, United States Lily-Arison Rene de Roland --- , MadagascarMadagascar is the non-breeding-season destination for a significant proportion of the global population of the migratory and Vulnerable Sooty Falcon Falco concolor. Here, we report on surveys of wintering birds in Madagascar, conducted in 2023 and 2024 over a total...