P35-5 Sat Jan 2 Learning to be attractive: investigating the role of learning in the expression of complex sexual signals Spezie, G*; Fusani, L; University of Veterinary Medicine, Vienna, Austria; Department of Behavioural and Cognitive Biology, University of Vienna, Vienna, Austria giovanni.spezie@vetmeduni.ac.at
Spotted bowerbirds (Ptilonorhynchus maculatus) build and decorate complex stick structures on their display arenas – the bower – and use it as a stage to perform a dance choreography to visiting females. Our project is focused on the behavior of immature and non-territorial male bowerbirds, which attend established bowers as auxiliary males and are tolerated by local bower owners. Several observations suggest that auxiliary males may acquire information concerning the mature form of courtship from these tutors. Patterns of similarities in the type and color of the displayed decorations suggest the existence of local traditions and social learning. While this evidence relates to construction abilities and decoration choice, little is known about the dance components of courtship. We used automated cameras to investigate whether the motor performance of these auxiliary males undergoes gradual refinement via practice and whether consistent similarities in the postural elements of courtship exist between auxiliary males and their tutors. The variables taken into consideration include the proportion of display elements, their sequence within a display bout and their fine-scale properties (e.g. duration). We present the analysis of some features of dance performance and preliminary results regarding the variables of interest.