1996, Benedict 2008, Jeschke and Kokko 2008, Logue and Hall 2014, Tobias et al. Migration can limit pair-bond duration, which may explain why duetting is negatively associated with migration in songbirds ( Ens et al. Pair-bond stability is thought to promote cooperation, which in turn favors the evolution of signals that facilitate cooperation, like duetting ( Hall 2004, Benedict 2008, Logue and Hall 2014, Tobias et al. Cooperative territory defense is the primary function of duet participation in birds, however, duets are also used for contact maintenance and mate guarding in some species ( Hall 2009).Īcross diverse avian taxa, duetting evolves in concert with long-term pair bonds ( Hall 2004, Benedict 2008, Logue and Hall 2014, Tobias et al. Duets are often composed of coordinated male and female song, but may also include vocalization types other than song ( Hall 2009, Benedict 2010). 2016), including an estimated 1,102 species of songbirds ( Tobias et al. Duetting is relatively common in birds, occurring in 4–18% of species ( Hall 2009, Tobias et al. Vocal duets are acoustic signals that occur when 2 individuals vocalize in temporal coordination ( Hall 2009, Logue and Krupp 2016). Este estudio, la primera descripción de la evolución del dueto en una gran familia de aves con origen en una zona templada, apoya la hipótesis de que el dueto co-evolucionó con una historia natural de sedentarismo en las aves.

Un análisis de correlación filogenéticamente explícito reveló una relación negativa significativa entre el dueto y la migración, de acuerdo con los resultados de otros taxa de aves. Tanto el dueto como la migración muestran una señal filogenética. La migración estuvo presente en el último ancestro común y se perdió varias veces. El dueto evolucionó múltiples veces en este grupo, incluyendo dos orígenes tempranos y varios orígenes recientes adicionales. Una reconstrucción del carácter ancestral indicó que el último ancestro común de los Parulidae del Nuevo Mundo no realizaba dueto. De las 95 especies de nuestro análisis, encontramos evidencia de dueto en 19 (20%) especies, y evidencia de migración en 45 (47.4%) especies. Examinamos la evolución del dueto y de la migración en los Parulidae del Nuevo Mundo, un grupo que ha sido en gran medida ignorado por la investigación sobre duetos. Trabajos previos indican que el dueto tiende a co-evolucionar con un estilo de vida no migratorio, probablemente debido a que la ausencia de migración facilita una mayor cooperación en la pareja. En las aves, la participación en un dueto funciona para defender cooperativamente recursos compartidos, localizar parejas y, en algunas especies, para proteger a la pareja. Los duetos vocales suceden cuando dos individuos vocalizan en coordinación temporal. This study, the first description of the evolution of duetting in a large avian family with a temperate-zone origin, supports the hypothesis that duetting co-evolves with a sedentary natural history in birds. A phylogenetically explicit correlation analysis revealed a significant negative relationship between duetting and migration, in keeping with findings from other avian taxa.

Both duetting and migration exhibit phylogenetic signal. Migration was present in the last common ancestor and was lost several times. Duetting evolved multiple times in this group, including 2 early origins and several more recent origins. Ancestral character reconstruction indicated that the last common ancestor of the New World warblers did not duet. Of the 95 species in our analysis, we found evidence of duetting in 19 (20%) species, and evidence of migration in 45 (47.4%) species. We examined the evolution of duetting and migration in New World warblers (Parulidae), a group that has been largely ignored by duetting research. Previous work indicates that duetting tends to co-evolve with a non-migratory lifestyle, probably because the absence of migration facilitates greater cooperation between mates. In birds, duet participation functions to cooperatively defend shared resources, localize mates, and in some species, guard the mate. Vocal duets occur when 2 individuals vocalize in temporal coordination.

New world warblers