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Conservation Status of the Dhole Cuon Alpinus in North-East India, with a Focus on Dampa Tiger Reserve, Mizoram

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Conservation Status of the Dhole Cuon Alpinus in North-East India, with a Focus on Dampa Tiger Reserve, Mizoram Conservation status of the dhole Cuon alpinus in north-east India, with a focus on Dampa Tiger Reserve, Mizoram P RIYA S INGH,ARJUN S RIVATHSA and D AVID W. MACDONALD Abstract Despite the efforts invested in their conservation, are a stronghold for the species (Acharya, ; Srivathsa the status of many threatened carnivores in key conserva- et al., ; Punjabi et al., ), with the largest dhole popu- tion landscapes remains unknown. The dhole Cuon alpinus lation (Kamler et al., ). However, the species has under- is an Endangered social carnivore whose geographical gone local extirpation across parts of its former range as a range has contracted by c. % since the early th century. result of declines of prey species, loss of habitat and, poten- North-east India is a critical link between South Asian and tially, disease (Karanth et al., ; Srivathsa et al., ). South-east Asian dhole populations. In this study we com- Information on dholes in north-east India in particular is piled presence records of dholes across north-east India, limited (Gopi et al., ; Bashir et al., ; Lyngdoh from multiple sources. We also conducted camera-trap et al., ), despite the fact that this landscape shares con- surveys in one part of this region, Dampa Tiger Reserve tinuous forest with Myanmar and South-east Asia, forming in the state of Mizoram. We examined the influence of an important part of the species' global range. ecological and management factors on fine-scale site-use Current knowledge of dholes in north-east India is by dholes in Dampa Tiger Reserve, showing a positive restricted to landscapes north of the River Brahmaputra association of dhole site-use with sambar Rusa unicolor (Ginsberg & Macdonald, ). This is primarily because encounters, distance to the forest boundary and presence of the paucity of baseline ecological data from the region, of forest department personnel, underscoring the import- given its undulating terrain, difficulty of access, wet climatic ance of prey and protection. Our findings also highlight conditions, and socio-political insurgencies. Here we pro- the need for targeted, multi-scale assessments of dhole vide a compilation of dhole presence records from across ecology across other sites in north-east India. north-east India using data extracted from multiple sources. Using data from camera-trap surveys we examine factors Keywords Camera traps, Cuon alpinus, distribution, dhole, influencing fine-scale site-use by dholes in Dampa Tiger Endangered, management, north-east India Reserve, Mizoram State. We discuss the implications of Supplementary material for this article is available at our results for dhole conservation in north-east India, https://doi.org/./S where the focus of wildlife managers is directed mainly towards population recoveries of and local recolonization by the tiger Panthera tigris. We provide recommendations he dhole Cuon alpinus is an Endangered social carni- for management interventions that could facilitate conser- Tvore found in forested landscapes of South and vation of dholes in this hitherto neglected landscape. South-east Asia. Historically widespread across Asia, the Dampa Tiger Reserve lies in the Indo-Myanmar Bio- species’ range has contracted by c. % (Wolf & Ripple, diversity Hotspot (Mittermeier et al., ; Fig. ). The ). The current distribution extends across most of reserve is contiguous with the Chittagong Hill Tract region South and South-east Asia and parts of China but is largely of Bangladesh to the west. The core area of the Reserve cov- restricted to protected areas (Kamler et al., ). The pro- ers km , and the multi-use buffer covers an area of tected forest landscapes south of the River Ganges in India km . The Lushai Hills traverse the reserve, with altitudes of –, m. Mean annual rainfall is ,–, mm (Islam & Rahmani, ). The Reserve supports a high di- versity of carnivores, including, in addition to the dhole, PRIYA SINGH Researchers for Wildlife Conservation, National Centre for Biological Sciences, GKVK Campus, Bengaluru, India four species of felids and two species of ursids (Singh & ARJUN SRIVATHSA* (Corresponding author, orcid.org/0000-0003-2935-3857) Macdonald, ). In this study we also recorded the ele- Department of Wildlife Ecology and Conservation, University of Florida, phant Elephas maximus, gaur Bos gaurus, sambar Rusa uni- Gainesville, USA. E-mail [email protected] color, red serow Capricornis rubidus, muntjac Muntiacus DAVID W. MACDONALD Department of Zoology, Wildlife Conservation Research muntjak and wild pig Sus scrofa. Unit, Recanati-Kaplan Centre, University of Oxford, Tubney, Abingdon, UK We compiled dhole presence records for nine north- *Also at: School of Natural Resources and Environment, University of Florida, Gainesville, USA, and Wildlife Conservation Society–India, Bengaluru, India eastern states (Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, Sikkim, Tripura and Received September . Revision requested November . Accepted February . First published online October . West Bengal). We searched for records from onwards Oryx, 2020, 54(6), 873–877 © 2019 Fauna & Flora International doi:10.1017/S0030605319000255 Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.42, on 01 Oct 2021 at 16:28:36, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0030605319000255 874 P. Singh et al. FIG. 1 North-east India, with Dampa Tiger Reserve in Mizoram and locations where the dhole Cuon alpinus has been recorded, with corresponding reliability scores (see text for details). in newspaper reports, scientific articles, grey literature (in- matrix therefore contained non-detections and detections cluding species checklists), and reports by forest department (coded as and , respectively) for sites (data from five personnel, local informants and naturalists working in the sites could not be retrieved), with a varying number of region. For each record we noted the type of evidence temporal replicates (– days). (direct/indirect), date of sighting, administrative status of We used photo-capture frequencies of key prey species location (protected/non-protected), and source person or (sambar n = , muntjac n = , wild pig n = ; predicted reference. We assigned reliability scores for each record positive influence), distance to reserve boundary (predicted (–; with being most reliable, and least reliable; positive influence), photo-capture frequencies of forest Supplementary Table ). department personnel (predicted positive influence) and From December to March , we deployed photo-capture frequencies of other humans (predicted pairs of Cuddeback Ambush IR camera traps (Model ; negative influence) as factors likely to influence site-use by Cuddeback, De Pere, USA) across km in the north-east dholes. We used trap effort (number of days a trap station of Dampa Tiger Reserve’s core area. At each station we was active) at each site as a covariate for detection probabil- placed two cameras facing each other, c. cm above the ity, predicting that higher effort would translate to higher ground, on either side of forest trails or on riverbeds detectability. We tested singular and additive effects of (Singh & Macdonald, ). Mean inter-trap distance was the covariates, in which each represented an ecologically . ± SD . km, with traps remaining active for an average plausible hypothesis. Covariates were checked for cross- of days (range –; Singh & Macdonald, ). Although correlations and z-transformed prior to analyses. Models the stations were intended to photograph wild felids, they were ranked using Akaike information criterion corrected also photographed other carnivores. Dholes generally use for small sample sizes (AICc; Burnham & Anderson, ). forest trails and riverbeds for movement, marking territories Parameter estimation and model comparisons were calcu- and hunting, and our sampling design therefore incorpo- lated with PRESENCE . (Hines, ). rated areas used by the species. We obtained presence records from locations for We examined site-use patterns through an occupancy ap- –, of which we considered records from – proach that accounted for imperfect detection (MacKenzie with reliability scores of – (Supplementary Table ). et al., ). We treated each station as a site, and each In the case of multiple records for the same site, we consid- trap-day as an independent temporal replicate. During ered the most recent record with the highest reliability exploratory analyses we calculated Moran’s I to check score. Most records were from Arunachal Pradesh (n = ) for spatial dependence of detections. Spatial dependence and Assam (n = ), with five records from Mizoram and dropped beyond . km, with , % of distance-pairs falling Nagaland, four from West Bengal, three from Meghalaya within the first distance class (Supplementary Fig. ). We and two from Sikkim. There were no recent records of considered this to be negligible with respect to the total dholes from Manipur and Tripura. A total of , camera number of trap stations and detections, and therefore trap-days in Dampa Tiger Reserve generated photo- treated each station as an independent site. The detection encounters of dholes, comprising detections (one per Oryx, 2020, 54(6), 873–877 © 2019 Fauna & Flora International doi:10.1017/S0030605319000255 Downloaded from https://www.cambridge.org/core. IP address: 170.106.33.42, on 01 Oct 2021 at 16:28:36, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms.
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