Integrating Occupancy Modeling and Camera-Trap Data to Estimate Medium and Large Mammal Detection and Richness in a Central American Biological Corridor

Cove, Michael V.; Spínola, R. Manuel; Jackson, Victoria L.; Sáenz, Joel C.; Chassot, Olivier

doi:10.1177/194008291300600606

Cited by 40 publications

(40 citation statements)

References 39 publications

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“…Given the high conservation value of T. pinchaque, it is imperative to validate to what extent the SFFOQ provides this species protection or shelter, considering the pressures it endures. Conclusions by Cove et al (2013) support this idea.…”

Section: Universitas Scientiarum Vol 22 (1): 9-29supporting

confidence: 73%

“…In Mexico, Lira- Torres & Briones-Salas (2012) found that in an area where subsistence hunting was practiced, T. bairdii presented nocturnal and crepuscular habits. It was suggested in a study by Cove et al (2013) and supported in this study by the abundance of photographic records that an increase in human presence may compel a high number of infrequent species to move to and concentrate in areas that provide them with suitable habitat. This suggests that T. pinchaque might be concentrated in dense cover areas (SF) within the SFFOQ possibly to avoid human presence.…”

Section: Universitas Scientiarum Vol 22 (1): 9-29mentioning

confidence: 96%

“…Bogotá Additionally, monitoring mammal diversity and activity patterns is important due to the relationships of these animals with anthropogenic dynamics, as supported by evidence outside and inside protected areas affected by human presence (Ordeñana et al 2010, Lira-Torres & Briones-Salas 2012, Gonthier & Castañeda 2013, Lynam et al 2013, in agriculture lands near forests (Cove et al 2013), in interfaces between rural and urban areas (Abi Said & Amr 2012, Saito & Koike 2013, as well as in relation with the presence of exotic species (Ordeñana et al 2010, Lenth et al 2008. Therefore, monitoring species community diversity and activity patterns are fundamental aspects when evaluating species vulnerability within a protected area.…”

Section: Monitoring Program For Mammals In a Protected Area Of Colombmentioning

confidence: 99%

“…Authors such as Cove et al (2013) contend that species of the genus Tapirus are very sensitive to changes in their habitats. This may put them at risk as populations of large herbivores are among the first species to be threatened when their habitats deteriorate.…”

Section: Universitas Scientiarum Vol 22 (1): 9-29mentioning

confidence: 99%

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Monitoring program for mammals in a protected area of Colombia

et al. 2017

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Between the second semester of 2009 and the first semester of 2011, camera traps were set up in conserved and disturbed habitats in the Otún Quimbaya Flora and Fauna Sanctuary. From a sampling effort of 2,066 camera-days, 673 photographs of 157 independent events were obtained for eight species of wild mammals and a domestic one. Their activity patterns were mainly nocturnal even for those species reported as diurnal. The impact of human interference and exotic species was evident for two species: Tapirus pinchaque and Cerdocyon thous. The former was observed below its altitudinal range with activity patterns mainly crepuscular and nocturnal. The second was observed in the same habitats where domestic dogs were found, with activity patterns mainly crepuscular and nocturnal. These findings suggest that both species have altered their activity patterns. Actions must be focused on decreasing the interaction of these mammals with humans and domestic dogs.

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Section: Universitas Scientiarum Vol 22 (1): 9-29supporting

confidence: 73%

Section: Universitas Scientiarum Vol 22 (1): 9-29mentioning

confidence: 96%

Section: Monitoring Program For Mammals In a Protected Area Of Colombmentioning

confidence: 99%

Section: Universitas Scientiarum Vol 22 (1): 9-29mentioning

confidence: 99%

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Monitoring program for mammals in a protected area of Colombia

et al. 2017

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“…This approach has the differential of dealing with imperfect detection, because individuals may not be detected due to sampling limitations or low population density, which is common issue for several species of medium and large-sized tropical mammals (Mackenzie et al 2002, O'Connell et al 2006. Furthermore, occupancy models are a powerful tool to analyze the influence of landscape covariates and habitat changes on species occurrence (Nicholson & Manen 2009, Cove 2011). …”

Section: Introductionmentioning

confidence: 99%

Buffer zone use by mammals in a Cerrado protected area

et al. 2016

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Habitat loss and degradation is threatening mammals worldwide. Therefore, Protected Areas (PA) are of utmost importance to preserve biodiversity. Their effectiveness, however, depends on some management strategies such as buffer zones, which prevent/mitigate the impact of external threats and might increase the amount of available habitat for wildlife existing within reserves. Nevertheless, how intensively terrestrial mammals use buffer zones remains little studied, particularly in the Neotropical region. Aiming to analyse the use of a buffer zone (5 km wide) by medium and large-sized mammals, we modelled the occupancy probabilities of five species of conservation concern including local (interior and buffer zone) as a site covariate, simultaneously controlling for imperfect detection. Data collection was made with camera traps from April to September 2013 in a 9000 ha Cerrado PA (“interior”) and in its surrounding area (39721.41 ha; “buffer zone”). This PA (Jataí Ecological Station) is immersed in a landscape where sugarcane plantations predominate in the northeastern of the state of São Paulo. We also conducted an inventory to compare the number and composition of species between interior and buffer zone. A total of 31 mammal species (26 natives) was recorded via camera traps and active search for sightings, vocalizations, tracks and signs. Occupancy estimates for Myrmecophaga tridactyla, Leopardus pardalis and Pecari tajacu were numerically higher in interior. On the other hand, Chrysocyon brachyurus had the highest occupancy in buffer zone, while the largest predator, Puma concolor, used both areas similarly. However, as the confidence intervals (95%) overlapped, the differences in occupancy probabilities between interior and buffer were weak for all these species. Additionally, regarding only the species recorded by cameras, the observed and estimated richness were similar between interior and buffer zone of the PA. Our data demonstrated that the buffer zone is indeed used by medium and large-sized mammals, including conservation-dependent ones. The lack of enforcement of current legislation regarding buffer zones is therefore a real threat for mammals, even when protection is guaranteed in the interior of protected areas.

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Framing pictures: A conceptual framework to identify and correct for biases in detection probability of camera traps enabling multi‐species comparison

Hofmeester

Cromsigt

Oddén

et al. 2019

Ecology and Evolution

107

106

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Obtaining reliable species observations is of great importance in animal ecology and wildlife conservation. An increasing number of studies use camera traps (CTs) to study wildlife communities, and an increasing effort is made to make better use and reuse of the large amounts of data that are produced. It is in these circumstances that it becomes paramount to correct for the species‐ and study‐specific variation in imperfect detection within CTs. We reviewed the literature and used our own experience to compile a list of factors that affect CT detection of animals. We did this within a conceptual framework of six distinct scales separating out the influences of (a) animal characteristics, (b) CT specifications, (c) CT set‐up protocols, and (d) environmental variables. We identified 40 factors that can potentially influence the detection of animals by CTs at these six scales. Many of these factors were related to only a few overarching parameters. Most of the animal characteristics scale with body mass and diet type, and most environmental characteristics differ with season or latitude such that remote sensing products like NDVI could be used as a proxy index to capture this variation. Factors that influence detection at the microsite and camera scales are probably the most important in determining CT detection of animals. The type of study and specific research question will determine which factors should be corrected. Corrections can be done by directly adjusting the CT metric of interest or by using covariates in a statistical framework. Our conceptual framework can be used to design better CT studies and help when analyzing CT data. Furthermore, it provides an overview of which factors should be reported in CT studies to make them repeatable, comparable, and their data reusable. This should greatly improve the possibilities for global scale analyses of (reused) CT data.

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Integrating Occupancy Modeling and Camera-Trap Data to Estimate Medium and Large Mammal Detection and Richness in a Central American Biological Corridor

Cited by 40 publications

References 39 publications

Monitoring program for mammals in a protected area of Colombia

Monitoring program for mammals in a protected area of Colombia

Buffer zone use by mammals in a Cerrado protected area

Framing pictures: A conceptual framework to identify and correct for biases in detection probability of camera traps enabling multi‐species comparison

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