Camera-trapping forest–woodland wildlife of western Uganda reveals how gregariousness biases estimates of relative abundance and distribution

Treves, Adrian; Mwima, P.; Plumptre, Andrew J.; Isoke, Sam

doi:10.1016/j.biocon.2009.11.025

Cited by 67 publications

(60 citation statements)

References 31 publications

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“…Images captured can be biased by species-specific characteristics, as camera trap detection is higher in gregarious species that forage and travel together than solitary individuals (Treves et al 2010) and they are also more effective at detecting smaller, solitary, and nocturnal species than wildlife patrol units (Burton 2012). Population assessments using camera traps can also be affected by anthropogenic disturbances and human presence.…”

Section: Assessment Biasesmentioning

confidence: 99%

Advancing Primate Research and Conservation Through the Use of Camera Traps: Introduction to the Special Issue

Pebsworth

LaFleur

2014

Int J Primatol

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Effective conservation and management of primates depend on our ability to accurately assess and monitor populations through research. Camera traps are proving to be useful tools for studying a variety of primate species, in diverse and often difficult habitats. Here, we discuss the use of camera traps in primatology to survey rare species, assess populations, and record behavior. We also discuss methodological considerations for primate studies, including camera trap research design, inherent biases, and some limitations of camera traps. We encourage other primatologists to use transparent and standardized methods, and when appropriate to consider using occupancy framework to account for imperfect detection, and complementary techniques, e.g., transect counts, interviews, behavioral observation, to ensure accuracy of data interpretation. In addition, we address the conservation implications of camera trapping, such as using data to inform industry, garner public support, and contributing photos to large-scale habitat monitoring projects. Camera trap studies such as these are sure to advance research and conservation of primate species. Finally, we provide commentary on the ethical considerations, e.g., photographs of humans and illegal activity, of using camera traps in primate research. We believe ethical considerations will be particularly important in future primate studies, although this topic has not previously been addressed for camera trap use in primatology or any wildlife species.

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Section: Assessment Biasesmentioning

confidence: 99%

Advancing Primate Research and Conservation Through the Use of Camera Traps: Introduction to the Special Issue

Pebsworth

LaFleur

2014

Int J Primatol

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“…The use of relative abundance index (RAI) based on camera trap encounter rates for ecological studies is controversial particularly when comparing between species as a large number of variables (e.g. body size, average group size, behavior) are likely to affect trapping rates and detection probability, and thus, confound the relationship with actual abundance (Jennelle et al 2002;Treves et al 2010). However, there is increasing evidence for a linear relationship between RAI and abundance estimated through more rigorous methodologies (Rovero and Marshall 2008).…”

Section: Introductionmentioning

confidence: 98%

Estimating Mammalian Abundance Using Camera Traps in the Tropical Forest of Similipal Tiger Reserve, Odisha, India

Palei

Pradhan²,

Sahu

et al. 2015

Proc Zool Soc

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Knowledge on the occurrence and distribution of species is crucial for designing and evaluating conservation strategies within a geographical region. Similipal Tiger Reserve though confined to a small area needs information on the diversity and abundance of mammalian fauna to ensure conservation of tiger. Thus, we aimed to assess the diversity and abundance of medium to large sized mammals in Similipal Tiger Reserve by using remotely triggered camera traps. A total of 6413 camera trap days at 187 trap stations were deployed from November 2012 to July 2013 to estimate the status of mammal. We obtained 3763 independent photographs and detected 24 species of mammals. The relative abundance index of each mammalian species was calculated. Leopard (Panthera pardus) was the most abundant carnivore while barking deer (Muntiacus muntjac) was the most abundant prey. Anthropogenic activities like hunting, livestock grazing and free ranging domestic dogs were found to be the detrimental factors for the existing mammalian species. These activities should be addressed through conservation and development perception with an interdisciplinary approach, incorporating social and ecological components cautiously.

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“…comm., March 2013;Oram, pers. This technology has been used extensively to study population density and abundance of elusive mammals [e.g., Kawanishi & Sunquist, 2004;Kays & Slauson, 2008;O'Connell et al, 2011;Treves et al, 2010;Wilting et al, 2012]. Camera traps offer a possible alternative for studying at least some aspects of the behavior of these elusive apes.…”

Section: Introductionmentioning

confidence: 99%

Terrestriality in the bornean orangutan (Pongo pygmaeus morio) and implications for their ecology and conservation

Loken

Spehar

Rayadin

2013

American J Primatol

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Aside from anecdotal evidence, terrestriality in orangutans (Pongo spp.) has not been quantified or subject to careful study and important questions remain about the extent and contexts of terrestrial behavior. Understanding the factors that influence orangutan terrestriality also has significant implications for their conservation. Here we report on a camera trapping study of terrestrial behavior in the northeastern Bornean orangutan, Pongo pygmaeus morio, in Wehea Forest, East Kalimantan, Indonesia. We used 78 non-baited camera traps set in 43 stations along roads, trails, and at mineral licks (sepans) to document the frequency of orangutan terrestriality. Habitat assessments were used to determine how terrestrial behavior was influenced by canopy connectivity. We compared camera trapping results for P. p. morio to those for a known terrestrial primate (Macaca nemestrina), and another largely arboreal species (Presbytis rubicunda) to assess the relative frequency of terrestrial behavior by P. p. morio. A combined sampling effort of 14,446 trap days resulted in photographs of at least 15 individual orangutans, with females being the most frequently recorded age sex class (N=32) followed by flanged males (N=26 records). P. p. morio represented the second most recorded primate (N=110 total records) of seven primate species recorded. Capture scores for M. nemestrina (0.270) and P. p. morio (0.237) were similar and almost seven times higher than for the next most recorded primate, P. rubicunda (0.035). In addition, our results indicate that for orangutans, there was no clear relationship between canopy connectivity and terrestriality. Overall, our data suggest that terrestriality is relatively common for the orangutans in Wehea Forest and represents a regular strategy employed by individuals of all age-sex classes. As Borneo and Sumatra increasingly become characterized by mixed-use habitats, understanding the ecological requirements and resilience in orangutans is necessary for designing optimal conservation strategies.

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Camera-trapping forest–woodland wildlife of western Uganda reveals how gregariousness biases estimates of relative abundance and distribution

Cited by 67 publications

References 31 publications

Advancing Primate Research and Conservation Through the Use of Camera Traps: Introduction to the Special Issue

Advancing Primate Research and Conservation Through the Use of Camera Traps: Introduction to the Special Issue

Estimating Mammalian Abundance Using Camera Traps in the Tropical Forest of Similipal Tiger Reserve, Odisha, India

Terrestriality in the bornean orangutan (Pongo pygmaeus morio) and implications for their ecology and conservation

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