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Distribution of discriminant scores for adult/subadult Pithecia chrysocephala call types along two canonical discriminant functions in Manaus, Brazil, June–August 2018.
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Vocalizations are a vital form of communication. Call structure and use may change depending on emotional arousal, behavioral context, sex, or social complexity. Pithecia chrysocephala (golden-faced sakis) are a little-studied Neotropical species. We aimed to determine the vocal repertoire of P. chrysocephala and the influence of context on call st...
Citations
... We collected vocalisation data for Pithecia chrysocephala in June-August 2018 in Manaus, Brazil (-3.083, 59.983) (for methodology and vocal repertoire see Muir et al., 2019). We then gathered vocalisation data on two other Pithecia species from previous published studies, which we re-analysed and compared across species. ...
... Table 1. The complete adult vocal repertoires of P. chrysocephala, P. pithecia, and P. aequatorialis as recorded by Muir et al. (2019), Henline (2007), and Keiran (2012). P. aequatorialis calls were not put into groups within their study and so have been grouped according to their similarity to the others based on their description and/or behavioural context. ...
Information on primate vocalisations can be applied in several ways, including: improving captive welfare, as a census tool for cryptic species, or to investigate the impacts of anthropogenic disturbance on species’ behaviour (Delgado and van Shaik, 2000; Konrad and Geissman, 2006; Jacobsen et al., 2010). Vocalisations can be used as a taxonomic tool, and structural differences between calls have been used to compare a wide variety of taxa, including species of gibbon (Hylobatidae spp., Ruppell, 2010), marmosets (Callithrix spp., Mendes et al., 2009), owls (Strigidae spp., Flint et al., 2015), wolves (Canis spp., Kershenbaum et al., 2016), and galagos (Galagidae spp., Svensson et al., 2017). Additionally, differences in voca- lisations across taxonomic groups can be used to help determine genetic distances between species or investigate why vocal behaviours evolved (Blumstein and Armitage, 1998; Ord and Garcia-Porta, 2012).
Reintroductions of animals are important conservation tools for di erent taxa around the world. A reintroduction program in the Peruvian Amazon is focusing on black-faced spider monkeys (Ateles chamek). We investigated life-history parameters such as stage-speci c survival and female fertility rates using a capture-mark-recapture framework and data from the litera- ture. We estimated growth rate and probability of extinction for a reintroduced group using matrix models, as well as testing whether population growth depends more on survival of juvenile females or adult females. Our results suggest the popula- tion of the reintroduced group is decreasing. After projecting the group size for the next 25 years using di erent scenarios, we found that in order for the group to persist, survival rate of the female adult stage needs to exceed 79 %. Given that group growth rate is more sensitive to the survival of adult females, management measures actions that target this demographic are required to guarantee survival of the group. Extrapolations of our results are subject to restrictions imposed by the small sample size and the conditions speci c to this reintroduction program. However, this study may provide valuable lessons for reintroduction programs attempting the recovery of wild populations of similar species.
