Predators' DNA traces at livestock kill sites can aid better human-wildlife conflict management: National Centre for Biological Sciences

Time of India

08-05-2025

Bengaluru: Researchers from Bengaluru's National Centre for Biological Sciences (NCBS) have shown that trace DNA left by large carnivores at livestock kill sites can be used to reliably identify individual predators.
This approach offers a powerful tool to effectively manage human-wildlife conflict and understand predator behaviour and ecology, NCBS said Thursday. The study was recently published in the journal Biological Conservation."In communities that live in proximity to large carnivores,
livestock depredation
might cause conservation challenges. Systematic understanding of individuals involved in conflict is a critical first step towards a solution," said Prof Uma Ramakrishnan, senior author of the study.Pointing out that around the world, managing human-wildlife conflict often involves relocating or removing the suspected predator, NCBS said typically, forest departments rely on field signs like pugmarks, scat, or claw marks to identify the animal involved.
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"However, these signs can be ambiguous, and removing the non-target individual may disturb carnivore populations and sometimes, further intensify conflict situations. More reliable and robust genetic identification of predators could be an effective strategy for conflict resolution," it added.NCBS researchers, in collaboration with Panthera and Madhya Pradesh forest department, investigated 198 kill sites across two of central India's key tiger habitats: Kanha and Bandhavgarh Tiger Reserves. At each site, researchers collected non-invasive genetic samples — saliva, scat, and shed hair as a potential source of predator DNA."Using genetic tools based on Single Nucleotide Polymorphisms (SNPs), they identified individual tigers present at these kill sites. Shed hair samples were the most effective for identification, followed closely by saliva and scat. Overall, tigers were successfully identified at 85% of the kill sites, with species-level identification exceeding 95% across all sample types," NCBS said.To assess each tiger's likely involvement in a kill, the team developed a classification framework based on the type and location of genetic evidence. Each case was categorised as a "true predator" (high confidence), "circumstantial predator" (medium confidence), or "predator uncertain" (low confidence). Out of 198 cases studied, 72 were classified with high confidence, 34 with medium confidence, and 49 with low confidence.Himanshu Chhattani, lead author of the study, said, "Genetic samples are often the only true evidence of a predation event. While identification is possible, there remains some possibility of misidentification, especially when multiple individuals are present at the kill site. That's why it's important to assign confidence levels in identification. We hope that such a classification scheme will help better represent the level of confidence provided by the genetic tools and further evidence-based conflict management."For wildlife managers and conservationists, this method adds a reliable, evidence-based tool to help address predator-livestock conflict, while contributing to long-term predator monitoring, benefiting both local communities and
wildlife conservation
efforts.