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Documents disponibles écrits par cet auteur (12)
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Article
Robert E. Simmons, Auteur ; Marlei Martins, AuteurWe describe a collision of Africa’s largest raptor, the Martial Eagle Polemaetus bellicosus with a spinning blade at a South African wind farm in the Eastern Cape in July 2016, and the abandonment of the territory following a second fatal colli[...]
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Francisco Cervantes, Auteur ; Marlei Martins, Auteur ; Robert E. Simmons, AuteurAs the demand for carbon-neutral energy sources increases, so does the need to understand the impacts that these technologies have on the environment. Here, we assess the potential consequences of additional mortality on an Endangered raptor rec[...]
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Marie-Sophie Garcia-Heras, Auteur ; Francois Mougeot, Auteur ; Robert E. Simmons, Auteur ; Beatriz Arroyo, AuteurUnderstanding variation in food requirements of wild animals is of central importance in population ecology and conservation, as it helps to identify where and when food may be limiting. Studies on diet variation or prey provisioning rates may g[...]
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Morne A. du Plessis, Auteur ; Robert E. Simmons, Auteur ; Andrew N. Radford, AuteurWe studied the behavioural ecology of the Violet Woodhoopoe Phoeniculus damarensis, a rare species endemic to Namibia and southern Angola. Groups in Namibia consisted on average of 4.3 +/- 1.6 individuals, with apparently only a single breeding [...]
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Marie-Sophie Garcia-Heras, Auteur ; Francois Mougeot, Auteur ; Beatriz Arroyo, Auteur ; Graham Avery, Auteur ; Margaret Avery, Auteur ; Robert E. Simmons, AuteurDans Ostrich (88(1) 2017)Studying the diet of wild animals is central for understanding their flexibility in food requirements. The Black Harrier Circus maurus is an endangered raptor in South Africa and Namibia. To date, information about the diet of the species is ins[...]
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Robert E. Simmons, AuteurThe Damara Tern Sterna balaenarum is a small coastal-nesting seabird that breeds in the Namib Desert, with a stronghold in Namibia. About 125 pairs are known from scattered localities in South Africa, and there are suggestions that it breeds in [...]
Article
Robert E. Simmons, Auteur
Article
William Goulding, Auteur ; Richard A. Pettifor, Auteur ; Robert E. Simmons, AuteurDans Ostrich (83(2) 2012)Cape Wagtails Motacilla capensis have been identified as a species susceptible to infection by the mite Knemidokoptes jamaicensis, but the processes influencing infection rates and prevalence have not been studied. We assessed the mite infection[...]
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Jerome Fuchs, Auteur ; Robert E. Simmons, Auteur ; David P. Mindell, Auteur ; Rauri C. K. Bowie, Auteur ; Graeme Oatley, Auteur
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Robert E. Simmons, Auteur ; Leo A. T. Legra, AuteurWe undertook a 3-week expedition to Papua New Guinea in April-May 2007 to assess the breeding, threats and Population densities of the Papuan Harrier Circus spilonotus spilothorax and to determine a first global Population estimate for this almo[...]
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Yvonne C. Collingham, Auteur ; Brian Huntley, Auteur ; Res Altwegg, Auteur ; Phoebe Barnard, Auteur ; Oliver S. Beveridge, Auteur ; Richard D. Gregory, Auteur ; Lucy R. Mason, Auteur ; H. Dieter Oschadleus, Auteur ; Robert E. Simmons, Auteur ; Stephen G. Willis, Auteur ; Rhys E. Green, AuteurEstimates of annual survival rates of birds are valuable in a wide range of studies of population ecology and conservation. These include modelling studies to assess the impacts of climatic change or anthropogenic mortality for many species for [...]
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Julia Jenkins, Auteur ; Robert E. Simmons, Auteur ; Odette Curtis, Auteur ; Marion Atyeo, Auteur ; Domatilla Raimondo, Auteur ; Andrew R. Jenkins, AuteurDetermining the efficacy of using indicator species to predict the spatial location of biodiversity hotspots is one way of maximising the conservation of biodiversity in already threatened habitats. Recent evidence from Europe suggests raptors c[...]
