![]() We end by summarizing what is known about within-species lineages and genetic diversity and identify priority areas for future studies.Įfficient and effective monitoring methods are required to assess population status and gauge efficacy of conservation actions for threatened species. Further, by comparing allelic richness to heterozygosity across the range of a species, managers may identify populations in need of genetic management. We argue that at the spatial scale of a species' range, variation due to phylogeography and anthropogenically influenced diversity will overwhelm accuracy issues between studies and reveal broad spatial patterns. Tremarctos ornatus had the lowest average range-wide genetic diversity (Ar = 2.5 He = 0.43), although ascertainment bias may affect the results, whereas Ursus arctos had the highest diversity (Ar = 6.4 He = 0.69). We identified 193 loci genotyped in bears and argue this is a limitation within and among species comparisons. Studies had a median of 2 geographic sites, 30 individuals sampled per site, and 12 loci genotyped. We extracted microsatellite summary statistics from 104 papers that sampled 284 populations of any species within Ursidae, then yardstick-transformed the data for direct comparison. Yet there has not been a synthesis of these data within or among species because of difficulties comparing microsatellites. ![]() Bear researchers were at the forefront of using microsatellites to study the demographics and diversity of populations, such that 3 species have complete sampling and 3 others are represented across their range breadth. However, understanding the levels of diversity among populations of a species can be useful for conservation and management. We went there hoping to get pictures of the tigers and found tiger Ustaad and tigress Noor.Many of the 8 extant bear species have large ranges, yet range-wide studies of genetic diversity are often impractical because of logistic challenges or focus on local questions. I had heard that there was a mating pair of tigers in an area called Kala Paani. It's an old story from the Ranthambhore tiger reserve about six wild animals – a mama sloth bear with two babies on her back, a pair of mating tigers and an ape with a camera (me). If you are lucky enough to be in the vicinity that day, you will have one heck of a story to tell.Ī safari operator and photographer Aditya Singh was that lucky man, who documented one such incident with a few incredible images. However, there comes a day (probably once in few months), when a sloth bear opts to fight instead of flight (run for its life). On any given day, you can easily bet on a tiger to decimate the sloth bear. While they are known for their aggressive nature, sloth bears are of no match to the top predators of the jungle, the tigers and lions. They are not particularly slothful and roam almost anywhere, any time of the day, busy searching for food. Sloth bears are known to be very intelligent, but they rarely defend their territory. Now, the story of a similar clash between a sloth bear and two tigers has surfaced as a photo-essay on social media and has won thousands of hearts. ![]() An old video where a solitary sloth bear scares away two tigers in the Ranthambore National Park in Rajasthan went viral recently after the Rajya Sabha member Parimal Nathwani shared it on twitter.
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