In the shadow of the tiger, its co-predators are suffering   

#GS3 #Environment 

Hyenas, dholes, wolves, jackals and sloth bears’ ranges are shrinking and a tiger-centric policy cannot revive them, a new report shows. The picture for sympatric or co-predators of the tiger in India’s forests is not as rosy as the big cats themselves, a new government report shows. 

  • While the number of tigers has increased by six per cent every year since 2006, the same is not true for the co-predators.  
  • In fact, the conservation status of predators like the striped hyena, the Indian wild dog (dhole), jackals and wolves, is a cause of concern in most landscapes.  
  • The report gives the area of distribution of these species across the major landscapes — Shivalik Hills and Gangetic Plains, Central India and Eastern Ghats and lastly, the Western Ghats.  
  • For species like the striped hyena, the area of occupancy has reduced by almost half in the Shivalik Hills and Gangetic Plains and the Western Ghats landscapes between 2010 and 2018.  
  • The status of jackals and wolves is even more worrying. Their area has reduced by around 80 and 76 per cent respectively in the Western Ghats between 2010 and now.  
  • The special attention given to tigers under Project Tiger was to make them a conservation umbrella species. What this means is that by ensuring the survival of tigers, the apex predator in an ecosystem, one can also conserve the entire ecosystem and other species within it. In a way, tigers are seen as indicators of a healthy ecosystem. The more the tigers, the healthier an ecosystem. 
  • Status of Tigers, Co-predators and Prey in India, 2018 was released on July 28, on the eve of Global Tiger Day. The report is published every four years. 

Here is a brief summary of the major co-predators’ status: 

1. Striped hyena (Hyaena hyaena) 

  • Striped hyena distribution in the Shivalik Hills and Gangetic Plains landscape reduced to 1,054 square kilometres (sq km) in 2018, from 2,795 sq km in 2010. The species was present in Dudhwa and Sohagibarwa in 2010 but not in 2018-19, according to the latest report.  
  • The Shivalik Hills and Gangetic Plains landscape in India spans across the states of Himachal Pradesh, Uttarakhand, Uttar Pradesh, Bihar, West Bengal and Assam and is comprised of three parallel geological zones — the Shivaliks, the Bhabar tract and the Terai plains. 
  • Similarly, in the Central India and Eastern Ghats landscape, the minimum area of hyena presence declined to 91,072 sq km in 2018, from 1,04,453 km sq km in 2014. The species was found to be more prevalent outside protected areas.  
  • In the Western Ghats landscape, the distribution reduced to 2,376 sq km in 2018, from 4,376 sq km in 2010. 

2. Dhole (Cuon alpinus) 

  • The distribution area of dholes in the Western Ghats reduced to 31,880 sq km in 2018, from 39,981 sq km in 2014.  
  • Most recordings of the dhole were from outside protected areas. “Due to propensity of dholes to predate on livestock, they often come into conflict with people,” the report said. 
  • “Awareness, compensation, and legal enforcement are required for conserving dholes in this landscape. Understanding the dynamics of diseases and their impacts on the dhole populations due to human modification of the landscape is urgently needed to conserve this species,” it added. 
  • The occupancy area of the species in the Central India and Eastern Ghats landscape reduced to 67,576 sq km in 2018, from 78,703 sq km in 2014.  
  • “Dholes seem to have become extinct from the northern block comprising the forests of Sheopur, Kuno, Madhav, Ranthambore, Mukundara and Sariska,” the report said.  
  • In the Shivalik Hills and Gangetic Plains landscape, dholes were present in the Valmiki Tiger Reserve and the forests of Mirzapur in 2010, but now are limited to Suhelwa Wildlife Sanctuary in Uttar Pradesh and Valmiki Tiger Reserve.  

3. Indian wolf (Canis lupus pallipes) 

  • In the Western Ghats, wolves’ distribution has shrunk to just 2,443 sq km in 2018, from 10,615 sq km in 2014.  
  • The reports of 2014 and 2018 make the same comment on the wolf.  
  • “Due to development-driven loss of grasslands and scrublands outside the forested areas that are critical refuges for denning and pup rearing and with persecution of wolves by local communities for livestock predation, the species is highly threatened in the landscape.”  
  • In the Central India and Eastern Ghats landscape, the distribution has declined to 63,291 sq km in 2018, from 89,304 sq km in 2014.  

4. Golden jackal (Canis aureus) 

  • The species’ occupancy has reduced to 5,325 sq km in 2018, from 26,985 sq km in 2014 in the Western Ghats landscape. The estimation process had found presence of jackals in Kerala in 2014. But the latest report doesn’t include the state in the distribution of the species.  
  • The distribution of the jackal has reduced in the Shivalik Hills and Gangetic Plains landscape too —1,428 km sq in 2018, from 3,033 sq km in 2014.  
  • In Central India and the Eastern Ghats, the distribution has reduced to just 1,10,157 sq km in 2018, from 2,00,366 sq km in 2014. 
  • However, experts say that in the absence of any motioning programme or flagship scheme, it’s hard to tell the cause of this reduction at a national level.  

5. Sloth bear (Melursus ursinus) 

  • The distribution of the sloth bear decreased to 30,375 sq km in 2018, from 36,761 sq km in 2014, in the Western Ghats landscape. Their distribution is mostly outside protected areas.  
  • “The presence of bears outside protected areas and sub-urban landscapes though encouraging, also raises a major concern of human-bear conflict,” the report said.  
  • Two species of bears are found in the Shivalik Hills and Gangetic Plains landscape — sloth bear and Asiatic black bear (Ursus thibetanus). 
  • The reports give their distribution in a combined form. While in 2010, the total area occupied by these two species of bear was 7,121 sq km, in 2018, this dwindled to just 3,227 sq km.  
  • In the Central India and Eastern Ghats landscape, sloth bear distribution has reduced to 136,492 sq km in 2014, from 180,628 sq km in 2010.  
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