Why is it in the News?

Odisha is gearing up to provide an unparalleled experience to visitors through its upcoming black tiger safari, offering a rare glimpse into the lives of these majestic creatures in their natural habitat.

What are Black Tigers or Melanistic Tigers?

• Black tigers, also known as melanistic tigers, are a unique phenomenon resulting from a genetic condition called melanism.
  • Melanism causes an increased production of melanin, a pigment responsible for hair, eye, and skin colouration, resulting in black or nearly black skin, feathers, or hair in animals.
• In Simlipal Tiger Reserve, many royal Bengal tigers belong to a distinct lineage characterized by higher-than-normal levels of melanin.
• These tigers exhibit black and yellow interspersed stripes on their coats, though they are not entirely black.
  • Therefore, they are more accurately described as pseudo-melanistic.
• As per the 2022 All-India Tiger Estimation, 16 tigers were recorded in Similipal Tiger Reserve, out of which 10 were melanistic.
• However, ongoing tiger surveys conducted by the state government suggest that the actual number of royal Bengal tigers in Similipal Tiger Reserve may be higher than reported by the National Tiger Conservation Authority.

• Factors Contributing to (Pseudo) Melanism:

• Research conducted by the National Centre for Biological Sciences (NCBS) in Bengaluru indicates that a single mutation in the gene Transmembrane Aminopeptidase Q (Taqpep) is responsible for the enlargement or spreading of black stripes into the yellow background of black tigers.
• Genetic analyses and computer simulations suggest that Similipal's black tigers may have originated from a very small founding population of tigers and are likely inbred.
• Additionally, the isolation of tigers in Similipal Tiger Reserve leads to breeding within the population, further contributing to the prevalence of melanism among these tigers.

About Similipal Tiger Reserve (STR):

• Similipal, which derives its name from the ‘Simul’ (Silk Cotton) tree, is a national park and a Tiger Reserve situated in the northern part of Orissa’s Mayurbhanj district.
• It spans an expansive area of 2,750 square kilometres (1,060 square miles), bordering Jharkhand and West Bengal.
• Similipal Tiger Reserve is a key component of the Mayurbhanj Elephant Reserve, which encompasses three protected areas:
  • Similipal Tiger Reserve
  • Hadagarh Wildlife Sanctuary, and
  • Kuldiha Wildlife Sanctuary
• Biodiversity: Similipal is renowned for its rich biodiversity, boasting a diverse array of wildlife including the majestic Bengal tiger, the iconic Asian elephant, the formidable gaur, and the elusive chausingha.
• Recognized as a UNESCO World Network of Biosphere Reserves site since 2009, it stands as Asia's second-largest biosphere reserve, following the Gulf of Kachchh in Gujarat.
• Notably, Similipal Tiger Reserve holds the distinction of being the sole natural habitat in India for melanistic royal Bengal tigers, adding to its ecological significance.