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Indian
scientists make major breakthrough in tiger conservation Washington:
In a new study, a team of Indian scientists has announced a major breakthrough
in the science of saving tigers, namely, high-tech DNA fecal sampling. The study
was conducted by Samrat Mondol, Anish Andheria and Uma Ramakrishnan, of the National
Centre for Biological Sciences; K. Ullas Karanth, N. Samba Kumar, and Arjun M.
Gopalaswamy of the Wildlife Conservation Society and Centre for Wildlife Studies.
According to the study, researchers will be able to accurately count and assess
tiger populations by identifying individual animals from the unique DNA signature
found in their dung. In the past, DNA was collected from blood or tissue samples
from tigers that were darted and sedated. The authors said this new non-invasive
technique represents a powerful new tool for measuring the success of future conservation
efforts. "This study is a breakthrough in the science of counting tiger numbers,
which is a key yardstick for measuring conservation success," said noted tiger
scientist Dr. Ullas Karanth of the Wildlife Conservation Society. "The technique
will allow researchers to establish baseline numbers on tiger populations in places
where they have never been able to accurately count them before," he added. The
study took place in India's Bandipur Reserve in Karnataka, a longterm WCS research
site in the Western Ghats that supports a high abundance of tigers. Researchers
collected 58 tiger scats following rigorous protocols; then identified individual
animals through their DNA. Tiger populations were then estimated using sophisticated
computer models. These results were validated against camera trap data, where
individual tigers are photographed automatically and identified by their unique
stripe pattern. Camera-trapping is considered the gold standard in tiger population
estimation, but is impractical in several areas where tiger densities are low
or field conditions too rugged. According to Karanth, "We see genetic sampling
as a valuable additional tool for estimating tiger abundance in places like the
Russian Far East, Sunderban mangrove swamps and dense rainforests of Southeast
Asia where camera trapping might be impractical due to various environmental and
logistical constraints." -June
19, 2009 Go
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