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Article
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 [...]
Article
Mariana E. Carro, Auteur ; Gustavo J. Fernández, AuteurStaying or leaving the natal site is a decision that not only affects the individual but may have profound implications at the population level. Many studies have analysed natal philopatry in passerines, albeit mostly migratory species in the no[...]
Article
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[...]
Article
Gustavo J. Fernández, Auteur ; Mariana E. Carro, Auteur ; Paulo E. Llambías, AuteurStudies of variation in breeding parameters are often based on temporal analyses of a single population. However, to differentiate between the effects of regional and local factors, neighboring populations with limited interpopulational dispersa[...]
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Paulo E. Llambías, Auteur ; Paula S. Garrido, Auteur ; María M. Jefferies, Auteur ; Gustavo J. Fernández, AuteurThe study of geographic variation of social mating systems can shed new light on our understanding of how ecological variables shape extant mating associations. We report data on the social mating system, parental care and life history traits of[...]
Article
Mariana E. Carro, Auteur ; Paulo E. Llambías, Auteur ; Gustavo J. Fernández, AuteurBreeding dispersal is the movement of an individual between breeding attempts and is usually associated with the disruption of the social pair bond, although mates may disperse together as a social unit. In monogamous territorial species, the de[...]
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Paulo E. Llambías, Auteur ; Mariana E. Carro, Auteur ; Gustavo J. Fernández, AuteurSouth temperate songbirds differ from north temperate species in life-history traits, having greater adult survival, smaller clutch size, longer developmental periods and extended parental care. Due to its broad distribution, the House Wren, Tro[...]
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Gustavo J. Fernández, Auteur ; Juan C. Reboreda, AuteurThe breeding system of the Greater Rhea Rhea americana is almost unique among birds as it combines harem polygyny and sequential polyandry, with communal egg-laying and uniparental male care. In this species, large communal clutches (more than 3[...]
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Mariana Fasanella, Auteur ; Gustavo J. Fernández, AuteurAlarm calls given by parents when risk is detected during nesting may be considered a form of parental defense. We analyzed variations in callings of breeding pairs of the Southern House Wren Troglodytes musculus during the nesting cycle and whe[...]
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Gustavo J. Fernández, Auteur ; Juan C. Reboreda, Auteur
Article
Walter S. Svagelj, Auteur ; Gustavo J. Fernández, Auteur ; Myriam E. Mermoz, AuteurNest-site selection and nest defense are strategies for reducing the costs of brood parasitism and nest predation, two selective forces that can influence avian nesting success and fitness. During 2001-2002, we analyzed the effect of nest-site c[...]
Article
Paulo E. Llambías, Auteur ; Gustavo J. Fernández, AuteurNestboxes are known to increase clutch size, enhance breeding success and affect the social mating system of several cavity nesters. Although in recent years various cavity nesters have been studied in nestboxes in South America, the effects of [...]
Article
Mariana E. Carro, Auteur ; Myriam E. Mermoz, Auteur ; Gustavo J. Fernández, AuteurSeasonal fecundity of birds is influenced by clutch sizes and the number of successful breeding attempts during a breeding season. As such, understanding the factors that determine the decision to initiate multiple broods within a season and the[...]
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Catalina Serra, Auteur ; Gustavo J. Fernández, AuteurBreeding birds often give alarm calls when a predator is near the nest. These calls have been proposed to serve as distraction displays for the predator, alerts for a mate conveying information about the presence of a threat, or a warning for ne[...]
