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Article
Joseph F. Azar, Auteur ; Ben D. Bell, AuteurHabitat-dependent selection pressures may result in convergence of the characteristics of vocalisation of species living in the same habitat, favouring optimal transmission features. However, competitive interactions for acoustic space between d[...]
Article
Ben D. Bell ; C.K. Catchpole ; K J. Corbett ; R.J. Hornby June 1, 1973Bird Study, 20(2)Censuses employing the mapping method, ancillary to an intensive population study of Reed Buntings, Sedge Warblers and Reed Warblers, revealed some limitations of the technique, which requires modification if the aim of the census work is an abs[...]
Article
Gemma M. Bowker-Wright, Auteur ; Ben D. Bell, Auteur ; Peter A. Ritchie, Auteur ; Murray Williams, AuteurDans Wildfowl (62 2012)We examined levels of mitochondria] DNA (mtDNA) and DNA microsatellite genetic variation in Brown Teal (Anas chlorotis), mainland New Zealand's rarest waterfowl. Samples were taken from the two remaining wild populations, a captive population, a[...]
Article
Andrew Digby, Auteur ; Michael Towsey, Auteur ; Ben D. Bell, Auteur ; Paul D. Teal, AuteurTemporal and environmental variation in vocal activity can provide information on avian behaviour and call function not available to short-term experimental studies. Inter-sexual differences in this variation can provide insight into selection e[...]
Article
Andrew Digby, Auteur ; Ben D. Bell, Auteur ; Paul D. Teal, AuteurSexual call dimorphism in birds is usually associated with sexual size dimorphism. Departures from this relationship can be used to infer call function, but research into inter-sexual call differences, as with song function in general, has been [...]
