University of Oulu

Singh SK, Aspi J, Kvist L, Sharma R, Pandey P, Mishra S, et al. (2017) Fine-scale population genetic structure of the Bengal tiger (Panthera tigris tigris) in a human-dominated western Terai Arc Landscape, India. PLoS ONE 12(4): e0174371. https://doi.org/10.1371/journal.pone.0174371

Fine-scale population genetic structure of the Bengal tiger (Panthera tigris tigris) in a humandominated western Terai Arc Landscape, India

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Author: Singh, Sujeet Kumar1,2; Aspi, Jouni1; Kvist, Laura1;
Organizations: 1Department of Ecology and Genetics, University of Oulu, Oulu, Finland
2Wildlife Institute of India, Chandrabani, Dehradun, India
3Population and Conservation Genetics, Instituto Gulbenkian de Ciência, Oeiras, Portugal
4Department of Wildlife Sciences, Amity University, Noida, India
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.8 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe201706307605
Language: English
Published: Public Library of Science, 2017
Publish Date: 2017-06-30
Description:

Abstract

Despite massive global conservation strategies, tiger populations continued to decline until recently, mainly due to habitat loss, human-animal conflicts, and poaching. These factors are known to affect the genetic characteristics of tiger populations and decrease local effective population sizes. The Terai Arc Landscape (TAL) at the foothills of the Himalaya is one of the 42 source sites of tigers around the globe. Therefore, information on how landscape features and anthropogenic factors affect the fine-scale spatial genetic structure and variation of tigers in TAL is needed to develop proper management strategies for achieving longterm conservation goals. We document, for the first time, the genetic characteristics of this tiger population by genotyping 71 tiger samples using 13 microsatellite markers from the western region of TAL (WTAL) of 1800 km2. Specifically, we aimed to estimate the genetic variability, population structure, and gene flow. The microsatellite markers indicated that the levels of allelic diversity (MNA = 6.6) and genetic variation (Ho = 0.50, HE = 0.64) were slightly lower than those reported previously in other Bengal tiger populations. We observed moderate gene flow and significant genetic differentiation (FST= 0.060) and identified the presence of cryptic genetic structure using Bayesian and non-Bayesian approaches. There was low and significantly asymmetric migration between the two main subpopulations of the Rajaji Tiger Reserve and the Corbett Tiger Reserve in WTAL. Sibship relationships indicated that the functionality of the corridor between these subpopulations may be retained if the quality of the habitat does not deteriorate. However, we found that gene flow is not adequate in view of changing land use matrices. We discuss the need to maintain connectivity by implementing the measures that have been suggested previously to minimize the level of human disturbance, including relocation of villages and industries, prevention of encroachment,
and banning sand and boulder mining in the corridors.

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Series: PLoS ONE
ISSN: 1932-6203
ISSN-E: 1932-6203
ISSN-L: 1932-6203
Volume: 12
Issue: 4
Article number: e0174371
DOI: 10.1371/journal. pone.0174371
OADOI: https://oadoi.org/10.1371/journal. pone.0174371
Type of Publication: A1 Journal article – refereed
Field of Science: 1184 Genetics, developmental biology, physiology
1181 Ecology, evolutionary biology
Subjects:
Funding: This work was supported by Wildlife Institute of India to SPG.
Dataset Reference: All relevant data are within the manuscript, supporting information files, and the Dryad repository. Genotype data can be found at the following Dryad DOI: http://dx.doi.org/10.5061/dryad.4478b.
  http://dx.doi.org/10.5061/dryad.4478b
Copyright information: © 2017 Singh et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
  https://creativecommons.org/licenses/by/4.0/