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Article
Jessleena Suri, Auteur ; Petra Sumasgutner, Auteur ; Éléonore Hellard, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurAs the global trend towards urbanization continues, the need to understand its impact on wildlife grows. Species may have different levels of tolerance to urban disturbance; some even appear to thrive in urban areas and use human-subsidized reso[...]
Article
Petra Sumasgutner, Auteur ; Gareth J. Tate, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurCapsule: Urban Black Sparrowhawk males hunt mostly within 2.27 km of their nest during the breeding season (‘home range’ of 16.15 km2) and increased the distance slightly to 2.43 km outside of the breeding season (18.56 km2). We found high indiv[...]
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Jakob Katzenberger, Auteur ; Gareth Tate, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurUnderstanding the effects climate change may have on animal populations relies on establishing which environmental conditions shape their behaviour and subsequent reproductive output, fitness or survival. South Africa has seen significant warmin[...]
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Arjun Amar, Auteur ; Ann Koeslag, Auteur ; Gerard Malan, Auteur ; Mark Brown, Auteur ; Erin Wreford, AuteurThe morph ratio distribution in polymorphic species often varies clinally, with a gradual change in morph ratios across the distributional range of the species. In polymorphic bird populations, clinal variation is rarely quantified. We describe [...]
Article
Odette E. Curtis, Auteur ; Philip A. R. Hockey, Auteur ; Ann Koeslag, AuteurWe studied a population of Black Sparrowhawks Accipiter melanoleucus that has recently colonized the Cape Peninsula, South Africa. Black Sparrowhawks are winter breeders: over most of their range winters are dry, but the Cape Peninsula has a Med[...]
Article
Gareth Tate, Auteur ; Petra Sumasgutner, Auteur ; Ann Koeslag, Auteur ; Arjun Amar, AuteurHow multiple morphs are maintained within populations of colour polymorphic bird species remains a challenging question in evolutionary ecology. In some systems, differential productivity or survival between morphs are thought to play a role. He[...]
