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Article
Christopher J. Butler, Auteur ; Will Cresswell, Auteur ; Andrew Gosler, Auteur ; Christopher Perrins, AuteurCapsule The reproductive rate of Rose-ringed Parakeets in the UK was higher in 2001-2003 than previously estimated.Aim To measure reproductive rate and the factors affecting this in Rose-ringed Parakeets in England during a period of rapid expan[...]
Article
Anne Charmantier, Auteur ; Christopher Perrins, Auteur ; Robin H. McCleery, Auteur ; Ben C. Sheldon, Auteur ; Associate Editor: Robert Montgomerie, Auteur ; Editor: Jonathan B. Losos, AuteurAbstract: Life‐history traits in wild populations are often regarded as being subject to directional selection, and the existence of substantial variation and microevolutionary stasis of these characters is therefore a problem in need of explana[...]
Article
Christopher Perrins 1964-03Nature, 201(4924)IN a recent article in Nature, Wynne-Edwards1 said “the assumption, still rather widely made, [is] that under natural selection there can be no alternative to promoting the fecundity of the individual, providing this results in his leaving a lar[...]
Article
Mwangi Githiru, Auteur ; Luc Lens, Auteur ; Leon A. Bennun, Auteur ; Christopher Perrins, AuteurWe studied the presence of 'floaters', i.e. non-territorial individuals roaming occupied territories awaiting future breeding opportunities, in two separate White-starred Robin (Pogonocichla stellata) populations at the Taita Hills, Kenya, using[...]
Article
Nicholas Horrocks, Auteur ; Christopher Perrins, Auteur ; Anne Charmantier, AuteurSexual selection theory predicts that sexually selected ornaments are costly to maintain and, as condition-dependent signals, are likely to vary in attractiveness with season and age. Mute swans Cygnus olor possess a black, fleshy knob at the ba[...]
