Tigresses Dominate Manas, 2.4 Tigresses for Every Tiger – Indian Masterminds

Annual wildlife monitoring results from the Manas Tiger Reserve in Assam, which were released on World Tiger Day 2022, have provided encouraging data. The sex of 27 tigers could be correctly determined, including eight males and 19 females, giving a sex ratio of 1:2.4. This actually means that the Manas Tiger Reserve has 2.4 tigresses for every tiger.

This is a positive sign because, ecologically, all populations should be biased towards females, since a population with a higher number of males has a higher probability of experiencing a decline in numbers, said the Field Manager, Manas, Vaibhav Mathur, IFS. Indian brains.


Manas Tiger Reserve now has 52 adult tigers and 8 cubs, an increase of 8 adults and 4 cubs from last year, according to the latest camera trapping assessment, as stipulated by the National Tiger Conservation Authority ( NTCA). Among them, 23 new tigers were reported. And, 29 tigers were “repeated from last year”, meaning that of the 44 adults reported last year, 29 were recaptured in photos.

A total of 381 camera trap stations have been deployed by the Tiger Reserve authorities, with camera trap support from conservation partners WWF-India, WTI and Aaranyak.

An aerial view of the Manas Tiger Reserve. Photo courtesy of Tanjan Tamuly

Mr Mathur said: “The success of increasing the number of tigers in Manas is largely based on the protection that has been strengthened over time. Habitat management, coupled with an inclusive community program, has seen tiger numbers reach 52, according to the latest snapshot assessment.


The success of Project Tiger also gave rise to some problems. With increasing tiger population and decreasing habitats, human-tiger conflicts have increased in the country.

Mr. Mathur spoke of the way forward, as demonstrated by scientific and managerial experience. “We need to limit habitat interventions for tigers to thrive at their level of carrying capacity in source areas. Managerial experience will help decide tipping points by observing tiger dispersal and in-tiger fighting between tigers. Additionally, corridor areas need to be restored and activities need to be integrated with conservation, so that springs and sinks remain connected in a metapopulation.

A good thing is that Manas has a common border with Bhutan, and the tigers are in a continuous flow between the two countries, giving the big cats plenty of room to explore new habitats.


Apart from the tiger, the wildlife monitoring results also gave a population estimate of all other major species found in Manas. This was done for the first time holistically by Manas frontline staff through remote sampling. Data was collected on line transects on elephant back using an Android-based digital platform by rangers and foresters deployed to different anti-poaching camps in the reserve. A total effort of 400 km was provided for this exercise. The information gathered was then analyzed at the Manas Field Directorate and validated by the NTCA Tiger Cell of the Wildlife Institute of India, Dehradun.

According to this analysis, which will form a baseline for all future assessments, there are 3,220 hog deer, 1,656 wild buffalo, 1,174 Indian bison (gaur), 804 sambar deer and 2,613 elephants at Manas.


The official website of Manas National Park and Tiger Reserve – manasnptr.in – was also launched on World Tiger Day, by CEM, Bodo Territorial Region (BTR), Pramod Bodo. The website was developed in collaboration with AMTRON. Besides providing basic information about the tiger reserve, the website will also serve as an online booking portal starting from the next tourist season.

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