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Study estimates the density of tiger populations


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TNE4IjjTeiMn_24jRGcbpTl72eJkfbmt4t8yenImKBVvK0kTmF0xjctABnaLJIm9Conservationists conducted the camera-trap survey in the Thap Lan-Pang Sida Tiger Conservation Landscape (TCL) of DPKY, where recent reports suggest a small, but vital, population of tigers (Panthera tigris) occurs. (There’s currently debate about whether Indochinese tigers constitute their own subspecies, P. t. corbetti, or are simply a population of mainland Asian tigers, P. t. tigris, that also include the larger Bengal and Siberian tigers.)

Published in the journal Biological Conservation, the new scientific survey shows a glimmer of hope for a decade-old program known as the DPKY Tiger Recovery Project. Conservationists say they may even be on track to meet a goal of increasing Thailand’s tiger numbers by 50% by 2026. It may be that Thailand’s tigers can avoid the fate of those in other countries. 

But the DPKY population has room to grow. The estimated population for the study area is around 20 individuals, with a minimum of 14 and a maximum of 33 tigers. The researchers estimate the population density is only 0.63 tigers per 100 square kilometers (39 square miles) — a much lower density than otherfeatured-tigers-1200x694.png habitats in the tiger’s current range. 

For this study, the researchers used spatially explicitly capture-recapture (SECR) sampling, a popular method of population estimation. However, with so few tigers out there, reliable results were difficult, and, in the end, they found non-regular survey designs more beneficial.

Source: https://news.mongabay.com/2020/04/photos-of-wild-tiger-cubs-in-thailand-rekindles-hope-for-species/

Original paper: https://www.sciencedirect.com/science/article/pii/S0006320719313813?via%3Dihub

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