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PHYSICAL, CHEMICAL AND BIOTIC RESPONSES TO DECREASING WATER DEPTH IN A HIGHVELD PAN FOLLOWING WET AND DRY SUMMERS
Item type: Journal Article • Journal: Southern African Journal of Aquatic Sciences • Authors: KH Rogers --- Department of Botany, WN Ellery --- Department of Botany, NL Winternitz --- Department of Botany, R Dohmeier --- Department of Botany,The classification of highveld pans by Geldenhuys (1982) emphasized the spatial diversity of morphology, vegetation and fauna. However, since the characteristics of individual pans also change seasonally and over longer term wet/dry cycles, he called for more detailed limnological studies... -
A novel methodology for the rapid assessment of waterbird vulnerability to disturbance
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kate JH England --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South Africa Colin Jackson --- A Rocha Kenya, Mwamba Bird Observatory and Field Study Centre, Kenya Philip AR Hockey --- Percy FitzPatrick Institute of African Ornithology, DST–NRF Centre of Excellence, South AfricaA methodology for rapidly assessing the vulnerability of waterbirds to disturbance was tested at Sabaki estuary, Kenya. Three variables were employed to measure the responses of 15 species: (1) bird density, (2) minimum distance of birds from a stationary disturbance... -
Counting waterbirds on holiday: a snapshot for one Eastern Cape estuary
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: RLG Mullins --- , South Africa AJFK Craig --- , South AfricaOver a ten-year period, each December the same observer counted waterbirds on the same stretch of the Kariega River in the Eastern Cape, South Africa. The site surveyed is dominated by waders, with variable numbers of other feeding guilds. Piscivorous... -
Foraging behaviour of wintering shorebirds at Merja Zerga lagoon (Atlantic coast, Morocco)
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Feirouz Touhami --- , Morocco Hamid Rguibi Idrissi --- , Morocco Abdelaziz Benhoussa --- , MoroccoThis paper presents the results of a comparative study on the foraging behaviour of 15 species of wintering shorebirds at Merja Zerga lagoon. We video recorded a total of 600 actively foraging birds at the intertidal mudflats of the lagoon... -
Primary moult in the annual cycle of adult African Oystercatchers Haematopus moquini
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Taylyn C Bate --- University of Cape Town, South Africa Peter G Ryan --- University of Cape Town, South Africa Les G Underhill --- University of Cape Town, South AfricaAfrican Oystercatchers Haematopus moquini are sedentary, intertidal foraging birds, range-restricted to Namibia and South Africa. Their annual cycle has two components: breeding and moult. The Underhill–Zucchini model estimated a primary moult duration of 154 days, and mean start and completion...