Estimating Population Density of Amazonian Titi Monkeys (Callicebus discolor) via Playback Point Counts

Dacier, A.; Luna, Ana Gabriela de; Fernández-Duque, Eduardo; Fiore, Anthony Di

doi:10.1111/j.1744-7429.2010.00749.x

Cited by 127 publications

(41 citation statements)

References 29 publications

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“…Call playback has already been used successfully for distribution surveys of several titi monkey species, including Callicebus coimbrai (Aldrich et al 2008; Chagas and Ferrari 2010; Jerusalinsky 2013; Jerusalinsky et al 2006; SouzaAlves and Ferrari 2010, Plecturocebus discolor (formerly Callicebus discolor) (Dacier et al 2011) (Gestich et al 2017), and Plecturocebus olallae (formerly Callicebus olallae) (Martinez and Wallace 2016). In all cases, the technique was found to increase the likelihood of encountering the target animals.…”

Section: Call Playbacksmentioning

confidence: 96%

Pitheciid vocal communication: what can we say about what they are saying?

et al. 2017

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The variation in ecological traits in pitheciids allow investigation of vocal communication across a range of social and acoustic circumstances. In this review, we present a summary of the history of pitheciid vocal studies, and review i) the status of current knowledge of pitheciid vocal repertoire sizes, ii) how much we understand about the context of different acoustic signals, and iii) how can we potentially use our knowledge of vocalizations in animal welfare practices. The repertoires described for titi monkeys and sakis have the expected sizes for these genera, considering their relatively small social group sizes. However, uacari groups can contain over 100 individuals, and a larger vocal repertoire than the ones described would be expected, which could be a consequence of the fissionfusion social system where the large group divides into smaller subgroups. Nevertheless, vocal repertoires exist for only about 12% of the pitheciid species and nothing is known, for example, concerning call ontogeny. We hope that this study will act as a reference point for researchers interested in investigating vocal behaviour in pitheciids, thus, optimising both funding focus and, researcher's time and effort. Also, we hope to help defining methodologies and strategies for the conservation and management of pitheciid monkeys. 2014; SilvaJunior et al. 2013. Pitheciids show considerable variation in social traits and range sizes -for example, while all titi monkeys and many sakis form small groups in small territories, groups of uacaris and cuxius in some areas can be very large and range over extensive areas (Barnett et al. 2005; Bowler et al. Keywords

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Section: Call Playbacksmentioning

confidence: 96%

Pitheciid vocal communication: what can we say about what they are saying?

et al. 2017

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“…That 250m distance was chosen for it is close to the critical distance a human listener can discriminate a titi monkey vocalization (Robinson 1981;Dacier et al 2011). Other playbackbased primate surveys in fragmented landscapes also have used similar approaches (da Silva et al 2015).…”

Section: Survey Of Primate Occurrencementioning

confidence: 99%

Local vs landscape drivers of primate occupancy in a Brazilian fragmented region

2015

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Understanding the drivers of species distributions in human-dominated landscapes is crucial for proposing sound conservation strategies. Primates are the most studied terrestrial vertebrate taxa, yet still their response to forest loss and fragmentation widely varies among species.In this paper, we assessed the relative influence of local vs landscape features on occupancy of two primate species -the black-fronted titi monkey and the black-pencilled marmoset, in a Brazilian fragmented region. We created detection histories by performing repeated auditory surveys on 25 native vegetation patches. Then we fitted occupancy models using habitat and GIS-based data as site covariates, and weather conditions as detection covariates. We found that forest-like canopy elements are important for the titi monkey, which is a forest-dependent species. Marmoset occupancy was also related to local elements, but in a lesser extent. In addition, we found that ignoring detectability in playback call surveys created a 20% difference in occupancy estimates for the marmoset. We conclude that drivers of primate occupancy at the studied landscape rely mainly on local key habitat elements, so that on-ground conservation actions should not focus on habitat amount alone. Furthermore we reiterate that primate researchers should explicitly account for imperfect detection to avoid substantial detectability bias.

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“…Ateles fusciceps Peck et al, 2011) and to estimate primate density using a combination of playbacks and distance sampling (e.g. Callicebus discolor Dacier et al, 2011), or strip transects (e.g. Saguinus oedipus Savage et al, 2010).…”

Section: Andrea Salcedo R Manuel Mejia Katie Slocombe Sarah Papworthmentioning

confidence: 99%

“…The adults produce loud and regular calls, which are audible for about 500m, and occur in the early morning (Dacier et al, 2011). Groups do not chorus every morning (Papworth, 2012).…”

Section: Andrea Salcedo R Manuel Mejia Katie Slocombe Sarah Papworthmentioning

confidence: 99%

“…Groups do not chorus every morning (Papworth, 2012). Dacier et al, (2011) have previously shown that the responses of C. discolor to playback point transects does not violate the assumptions of distance sampling, and can also provide accurate estimates. Thus here we compare the cost and time for three different census methods for this species in Yasuní National Park, Ecuador (S 0°41, W 76°24); line transects, passive point transects, and playback point transects.…”

Section: Andrea Salcedo R Manuel Mejia Katie Slocombe Sarah Papworthmentioning

confidence: 99%

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Two case studies using playbacks to census neotropical primates: <i>Callicebus discolor</i> and <i>Alouatta palliata aequatorialis</i>

et al. 2014

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Estimating Population Density of Amazonian Titi Monkeys (Callicebus discolor) via Playback Point Counts

Cited by 127 publications

References 29 publications

Pitheciid vocal communication: what can we say about what they are saying?

Pitheciid vocal communication: what can we say about what they are saying?

Local vs landscape drivers of primate occupancy in a Brazilian fragmented region

Two case studies using playbacks to census neotropical primates: <i>Callicebus discolor</i> and <i>Alouatta palliata aequatorialis</i>

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