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April 2016 - April 2021
Publications
Publications (8)
We evaluated whether the availability of male mates affected mating strategies in a predominantly socially monogamous passerine, the grass wren Cistothorus platensis. We used the natural variation in adult sex ratio (ASR) and a male removal manipulation to assess if social polygyny was more frequent when male mates were less abundant. We evaluated...
Several hypotheses propose an adaptive function of non-breeding nests (female attraction, decoys for nest predators and safe places for roosting). Alternatively, non-breeding nests may be structures abandoned before completion. Grass Wrens Cistothorus platensis build two types of non-breeding nests: platform and dummy nests. Platforms are rudimenta...
The way parents allocate food among the nestlings in a brood has been the subject of several studies in recent years. Previous works have shown that parents sometimes decide who is going to receive the food according to food availability, nestlings' begging behavior, or the position of a chick in the nest. In this work, we studied the characteristi...
Studies of geographic variation in bird song can provide important insights into vocal evolution. An intraspecific approach, focused on a single species with a broad distribution, can be particularly helpful in understanding the diverse selective pressures on the characteristics of songs and singing behavior. Grass Wrens (Cistothorus platensis) are...
The Nearctic and the Neotropic differ in several abiotic and biotic features that have profound implications in avian ecology. Several of these variables are predicted to affect social mating systems. The Sedge Wren (Cistothorus platensis) and the House Wren (Troglodytes aedon) are distributed from Canada to Cape Horn and are ideal species to evalu...
The 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 a temperate population of southern Sedge Wrens (Cistothorus platensis platensis) in South America. We co...
