| Titre : | A novel method for analysis of vocal dimorphism using recordings of unsexed pairs and its application to the neotropical owl Pulsatrix koeniswaldiana (2022) |
| Auteurs : | Marcelo de Andréa Segall, Auteur ; Luiz Pedreira Gonzaga, Auteur ; Caio Fittipaldi Kenup, Auteur ; Gloria Denise Augusto Castiglioni, Auteur |
| Type de document : | Article |
| Dans : | Journal of Ornithology (163(2) April, 2022) |
| Article en page(s) : | 589-598 |
| Langues: | Anglais |
| Résumé : | The occurrence of vocal dimorphism in strigid owls has been known for a long time and it is widely accepted that males emit songs with lower frequency than those of females. However, there are several gaps in our knowledge about this phenomenon, which may be related to a scarcity of sound recordings of sexed individuals and difficulties in obtaining this kind of material. In this paper, we present a novel permutation-based analysis that allows the study of vocal dimorphism using recordings of unsexed individuals presumably forming breeding pairs. We used this method to investigate vocal dimorphism in the Tawny-browed Owl (Pulsatrix koeniswaldiana) alongside more conventional t tests, applied only to a subsample of individuals of known sex. Our results indicate that males of P. koeniswaldiana emit songs with lower frequencies and a narrower frequency range than those of females. There was also some evidence, which emerged only from the analysis of sexed individuals, that males emit longer songs with fewer harmonics. Even though our novel method does not estimate dimorphism directly and does not show its direction, it allows investigating it in a relatively easy and economical way and seems promising to help increase our knowledge about vocal dimorphism in strigids and other taxa. |
| En ligne : | https://doi.org/10.1007/s10336-022-01965-6 |



