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Article
Luciano N. Segura, Auteur ; Melina Atencio, Auteur ; Facundo X. Palacio, Auteur ; Adrián Jauregui, Auteur ; Bettina Mahler, AuteurThe red-crested cardinal (Paroaria coronata) is an emblematic bird of the southern cone of South America that has been traditionally classified as sexually monomorphic and monochromatic from a human visual perspective. Using reflectance spectrom[...]
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Mariana E. Carro, Auteur ; Gustavo J. Fernández, Auteur ; Bettina Mahler, AuteurSkewed adult sex ratio (ASR) has been proposed to be a consequence of breeding individuals producing a biassed primary sex ratio, sexual differences in offspring mortality or juvenile dispersal, or sexual differences in adult mortality. In this [...]
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Juan Manuel Rojas Ripari, Auteur ; Leonardo Campagna, Auteur ; Bettina Mahler, Auteur ; Irby Lovette, Auteur ; Juan Carlos Reboreda, Auteur ; María Cecilia De Mársico, AuteurCooperative breeding is a reproductive system in which one or more adults (helpers) assist others in rearing their offspring. Cooperative breeding occurs in 9% of birds, encompassing remarkable variation in mating systems and patterns of social [...]
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Melina Atencio, Auteur ; Juan Carlos Reboreda, Auteur ; Bettina Mahler, AuteurThe Yellow Cardinal Gubernatrix cristata is an ‘Endangered’ passerine from southern South America. For the past three years a management plan for Yellow Cardinals has been implemented in Argentina, in which rescued individuals from the illegal c[...]
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Mariana E. Carro, Auteur ; Paulo E. Llambías, Auteur ; Bettina Mahler, Auteur ; Gustavo J. Fernández, AuteurDispersal constitutes one of the main processes that shape population genetic structure and dynamics. Combining a capture-mark-resighting methodology and molecular genetics analyses, we studied the natal dispersal behaviour of House Wrens (Trogl[...]
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Marisol Domínguez, Auteur ; Juan Carlos Reboreda, Auteur ; Bettina Mahler, AuteurThe song learning process may lead to small-scale geographical variation in vocalizations of oscine birds. This variation can be further enhanced by the effects of habitat fragmentation or hybridization. Populations of the endangered Yellow Card[...]
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Luciano N. Segura, Auteur ; Bettina Mahler, Auteur ; Igor Berkunsky, Auteur ; Juan C. Reboreda, AuteurABSTRACT Studies on breeding biology in Neotropical birds are crucial for understanding different aspects of their life histories and also for their conservation. We describe the nesting biology of the Red-crested Cardinal (Paroaria coronata) in[...]
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Marisol Domínguez, Auteur ; Juan Carlos Reboreda, Auteur ; Bettina Mahler, AuteurThe Yellow Cardinal Gubernatrix cristata is a globally endangered passerine endemic to southern South America. Although the conservation status of this species is alarming, there is no information about factors that affect its reproductive succe[...]
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Luciano N. Segura, Auteur ; Bettina Mahler, Auteur ; Igor Berkunsky, Auteur ; Juan C. Reboreda, Auteur
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Adrian S. Di Giacomo, Auteur ; Alejandro G. Di Giacomo, Auteur ; Rafi Kliger, Auteur ; Juan C. Reboreda, Auteur ; Ralph Tiedemann, Auteur ; Bettina Mahler, AuteurThe Strange-tailed Tyrant Alectrurus risora (Aves: Tyrannidae) is an endemic species of southern South American grasslands that suffered a 90% reduction of its original distribution due to habitat transformation. This has led the species to be c[...]
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Ignacio Roesler, Auteur ; Santiago Imberti, Auteur ; Hernan Casanas, Auteur ; Bettina Mahler, Auteur ; Juan Carlos Reboreda, AuteurWe estimated the present population size of the Hooded Grebe Podiceps gallardoi and compared it with the population in 1985. During the breeding seasons 2009/2010 and 2010/2011 we monitored 251 lakes on the main plateaus of Santa Cruz province, [...]
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Bettina Mahler, Auteur ; Nancy I. Lopez, Auteur ; Alejandro G. Di Giacomo, Auteur ; Juan C. Reboreda, AuteurThe Shiny Cowbird Molothrus bonariensis is a sexually dichromatic species, in which males have blackish-blue iridescence and females are dull brown. However, in some subtropical parts of its distribution, females show a plumage polymorphism that[...]
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Kaspar Delhey, Auteur ; Martin Carrizo, Auteur ; Lucas Verniere, Auteur ; Bettina Mahler, Auteur ; Anne Peters, AuteurCosts imposed by brood parasitic birds exert strong selection on their hosts to avoid parasitism. While egg rejection is a common defence, nestling rejection is rarer and less well understood. Theoretical models suggest that among non-evicting p[...]
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María C. De Mársico, Auteur ; Bettina Mahler, Auteur ; Juan C. Reboreda, Auteur
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Alejandro G. Di Giacomo, Auteur ; Bettina Mahler, Auteur ; Juan C. Reboreda, Auteur
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Diego T. Tuero, Auteur ; Vanina D. Fiorini, Auteur ; Bettina Mahler, Auteur ; Juan C. Reboreda, AuteurIn birds, egg size affects chick growth and survival and it is an important component of reproductive success. The shiny cowbird Molothrus bonariensis is an extreme generalist brood parasite that uses hosts with a wide range of body masses. Surv[...]
