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Documents disponibles écrits par cet auteur (15)
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Article
Kate F. Carstens, Auteur ; Reshma Kassanjee, Auteur ; Robin M. Little, Auteur ; Peter G. Ryan, Auteur ; Philip AR Hockey, AuteurDispersal is of ecological and evolutionary importance for population biology because it affects a species’ ability to expand its range, to colonise new favourable habitats and to increase the likelihood of population persistence. Male birds are[...]
Article
Susan J Cunningham, Auteur ; Rowan O Martin, Auteur ; Philip AR Hockey, AuteurBehavioural thermoregulation, particularly the use of cool microclimates, is one method by which organisms could avoid the worst effects of climate warming. However, retreat into cool microsites, e.g. shady vegetation or burrows, may carry impor[...]
Article
Tom P Flower, Auteur ; Benjamin J Ashton, Auteur ; Elisabet Zöttl, Auteur ; Ryan M Olinger, Auteur ; Philip AR Hockey, AuteurDifferent species of brood parasitic birds, which lay their eggs in the nests of host foster-parents, rarely target the same host species population. We report brood parasitism of Fork-tailed Drongos Dicrurus adsimilis in the southern Kalahari D[...]
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Rowan O Martin, Auteur ; Susan J Cunningham, Auteur ; Philip AR Hockey, AuteurMany animals use thermally buffered microhabitats, e.g. patches of shade within trees, to avoid temperature extremes. These ‘thermal refugia’ may mediate the impact of climate change on animals. Predicting how species and communities will respon[...]
Article
Douglas Loewenthal, Auteur ; Dane M Paijmans, Auteur ; Philip AR Hockey, AuteurTheoretical and empirical studies of oystercatchers both suggest that levels of adult site fidelity, natal philopatry and age-at-first-breeding are interrelated consequences of life-history decisions made by potential breeders. All are fundament[...]
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Alan TK Lee, Auteur ; Phoebe Barnard, Auteur ; Philip AR Hockey, AuteurEstimates of bird numbers through quantification of density and range sizes are necessary for decisions regarding conservation status, yet counts of birds are often confounded by uncertainty of detection. The status of the endemic birds of the F[...]
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Ian T Little, Auteur ; Philip AR Hockey, Auteur ; Raymond Jansen, AuteurBy focusing on process-oriented data rather than inventory-type data, this study provides a robust understanding of the effects of agricultural management on grassland bird reproductive output in the moist highland grasslands (MHGs) of South Afr[...]
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Blair A Zoghby, Auteur ; Peter G Ryan, Auteur ; Rob M Little, Auteur ; Tim Reid, Auteur ; Philip AR Hockey, AuteurSouthern Ground-Hornbills Bucorvus leadbeateri are Endangered in South Africa and there is a concerted effort to reverse their population decline. They live in groups year round, with only the alpha pair breeding, raising at most one chick per y[...]
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Hannah L Thomas, Auteur ; Philip AR Hockey, Auteur ; Graeme S Cumming, AuteurHighly mobile species are difficult to monitor. It is often unclear from abundance estimates whether a population is genuinely declining or simply elsewhere. If the spatial and temporal scales of monitoring are inadequate, the data will only be [...]
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Dane M Paijmans, Auteur ; Douglas Loewenthal, Auteur ; Peter G Ryan, Auteur ; Philip AR Hockey, AuteurAfrican Black Oystercatchers Haematopus moquini produce a modal clutch size of two eggs and only rarely lay three eggs. A review of over 4 000 nest records from across their breeding range (dating back to the early 1960s) revealed that three-egg[...]
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Douglas Loewenthal, Auteur ; Dane M Paijmans, Auteur ; Philip W Haupt, Auteur ; Philip AR Hockey, AuteurThe African Black Oystercatcher Haematopus moquini is classified as Near Threatened because the population size is small (
Article
Douglas Loewenthal, Auteur ; Dane M Paijmans, Auteur ; Philip AR Hockey, AuteurAdult African Black Oystercatchers Haematopus moquini are sedentary and territorial year round, with juveniles expressing strong natal philopatry. At four South African study sites (two mainland and two islands) breeding numbers more than double[...]
Article
Ross M. Wanless, Auteur ; Philip AR Hockey, Auteur
Article
Blair A Zoghby, Auteur ; Rob M Little, Auteur ; Peter G Ryan, Auteur ; Philip AR Hockey, AuteurDifferent habitats may be used for the needs of various aspects of an animal’s life. Southern Ground-Hornbill Bucorvus leadbeateri groups announce their presence within year-round territories by calling at dawn from their overnight roost sites. [...]
