Resumo

CRUZ-BERNATE, Lorena. Does being dominant bring advantages? Hierarchical position, nesting sites and reproductive success of Forpus conspicillatus (Aves: Psittacidae). Bol. Cient. Mus. Hist. Nat. Univ. Caldas [online]. 2021, vol.25, n.1, pp.71-86.  Epub 15-Jul-2021. ISSN 0123-3068.  https://doi.org/10.17151/bccm.2021.25.1.5.

The relationship between the preference of selection of nesting sites, the hierarchical position and the reproductive success of Spectacled parrotlets (Forpus conspicillatus) were researched in Universidad del Valle and Pozo Verde Natural Reserve in Valle del Cauca, Colombia. The nesting sites were installed according to the variables height above the ground (1m and 4m) and distance to nearest tree (0m, 15m and 50m). The adult pairs preferred the nest boxes located 4 m above the ground. The hierarchical position of the pairs was not significantly correlated with the priority of choosing the nest boxes but with the selection of boxes in the preferred sites. The dominant pairs produced a greater number of eggs than the subordinate ones, but there was no correlation between hierarchical position and number of chicks that reached the exodus. Nor there was correlation between annual productivity, measured as the number of chicks that reached the exodus and the location of the nest boxes. The absence of correlation could be due to the fact that predation, the main cause of mortality of chicks, had the same incidence in all situations. Infanticide by Troglodytes aedon was responsible for 30.30% of the nest failures of F. conspicillatus but damage by T. aedon was not more frequent at sites preferred by F. conspicillatus.

Palavras-chave : dominance; reproduction; nest boxes; parakeet; Forpus conspicillatus; Colombia.

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