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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Variation within and between courts in visual components of Swallow-tailed Manakin (Chiroxiphia caudata) display (2019)
Auteurs :	Pedro H. L. Ribeiro, Auteur ; André C. Guaraldo, Auteur ; Regina H. Macedo, Auteur ; Lilian T. Manica, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (160(2) April, 2019)
Article en page(s) :	485-496
Langues:	Anglais
Résumé :	Birds are well known for displaying courtship exhibitions shaped by sexual selection that involve combinations of visual, motor, and acoustic components. Among such multifaceted exhibitions are those of male piprids, which can perform coordinated or cooperative displays to attract females. Here we focus on the Swallow-tailed Manakin (Chiroxiphia caudata), endemic to the Atlantic Forest, whose displays include two or more males executing a cartwheel-type movement (“cooperative display”) and solo exhibitions. We used videography to describe and analyze male maneuvers and to test differences in display parameters between courts (where adult males perform coordinated/cooperative displays in groups of two to six individuals within an arena) and between dominant and subordinate males. We recorded displays of individuals from four courts in southern Brazil during two breeding seasons. We identified nine male display elements, five in cooperative, three in solo formations and one in other contexts, in addition to two elements performed exclusively by females. Sequences of male display elements were highly stereotyped, but three display parameters differed between courts: vertical flight height, distance from which males approached females and cartwheel velocity. Moreover, subordinates flew longer vertical flights than dominants. This variability suggests that females may evaluate courts based on display parameters, leading to their decision to remain at the perch, attend the solo display and eventually copulate. The vertical flight duration can also be a signal used during intrasexual communication, such as for hierarchy establishment. Our detailed description of male display attributes provides essential evidence that courts differ in motor parameters, and opens an avenue for further studies on sexual selection mechanisms in the Swallow-tailed Manakin and other manakins.
En ligne :	https://doi.org/10.1007/s10336-019-01627-0

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