Salinity of river makes Royal Bengal tiger lose its sheen and weight

TAGS: Salinity of river makes Royal Bengal tiger lose sheen | India | Sunderban delta | West Bengal | Kolkata | South 24 Parganas district | Bangladesh A Royal Bengal tiger that had strayed being relocated to the Sunderbans. Excess of salt is bad for your health and for India's national animal as well. The once regal Royal Bengal tiger is losing its sheen - literally. And the salinity of the river water in West Bengal's Sunderban delta, which has been its home for centuries, is to be blamed for this. Recent observations by state wildlife experts have revealed serious physiological changes in this endangered cat, considered Bengal's pride. These include weight loss, shrinking size and fading lustre. Experts believe this is because of climatic change and increased salinity in the water. While the average weight of an adult Royal Bengal tiger in other parts of India is over 180kg, in the Sunderban region it has fallen to around 110kg. And it hasn't just lost weight. The length of a Sunderban tiger has come down from over 9 feet to about 8 feet. "We have noticed a huge difference in the weight of an adult Sunderban tiger as compared to other parts of the country," Pranabesh Sanyal, a retired director of the reserve forest, said. "The lustre of its coat is also fading because of the increased salinity in the river water," Sanyal, who has been working on the tiger habitation in the mangrove forest since the early 1980s, added. In 2010, the state forest department had managed to trap and weigh six tigers after they had sneaked into human habitation. The weight of all six tigers was found to be between 100 and 110kg. The tiger's weight loss is being attributed to its consumption of saline water as the number of fresh water ponds inside the core area of Sunderbans has gone down drastically because of rising salinity. Currently, the average salinity in Sunderbans is more than 21 parts per thousand (ppt), which touches 25 ppt during winter. Experts claim that the salinity level in the mangrove forest has increased 15 per cent in the last two decades. Food shortage is believed to be another reason for this weight loss. "Due to the shortage of natural fodder, a tiger has to spend more time trying to catch its prey. We have noticed a significant migration of tigers from the core area to the buffer zones because of the unavailability of food," Sanyal said. The unique feature of the Sunderban tiger is that it can swim. Located in Kolkata's neighbouring South 24 Parganas district, the Sunderbans is part of the world's largest delta formed at the confluence of the rivers Ganges, Brahmaputra and Meghna. It is spread over a vast area of 4,262 sq km with a major portion lying in Bangladesh. The deltaic belt, which houses a vast tract of forest and saltwater swamp, is located in the lower part of the Ganges. It extends 260km along the Bay of Bengal from the Hooghly river estuary in India to the Meghna river in Bangladesh. Shanki Ranjan Banerjee, an honorary director of Wildlife Protection Society of India (WPSI), also thinks food shortage to be one of the major reasons that the Royal Bengal tiger is losing its weight. "The tigers in the Sunderban delta are facing a shortage of natural fodder. Over a period of time we have also noticed that it is losing weight. It is also shrinking in size and losing its lustre," Banerjee said. He urged the West Bengal government to address this food shortage. "According to the records available with the World Wildlife Fund, there seemed to be very few tigers left in the Sunderbans. That means there should be enough number of boars and deer for the tigers to feed on," Banerjee added. But the reality seems to be far from truth. "I remember an interesting incident that dates back to 2009, when a Royal Bengal tiger ate a cobra and died in Netidhopani village of the Sunderbans. The post-mortem revealed that the tiger had died of snake venom. It happened only because of food shortage," Banerjee pointed out. Experts urged the West Bengal government to set up fresh water ponds inside the core area of the Sunderbans to stop tigers from drinking saline water. Currently, there is only one fresh water pond in the forest area. They feel the government should also encourage wild boar farming in the mangrove forests so that the tigers can get their food easily and don't have to wander into human habitation. Sources said there was a wild boar farm at Jharkhali village in the late 1980s. But it had to be closed down by the state forest department because of inept handling. With West Bengal chief minister Mamata Banerjee busy making life difficult for the UPA government at the Centre, one wonders whether she would have time for the tigers. Read more at: http://indiatoday.intoday.in/story/salinity-river-royal-bengal-tiger-lose-sheen-weight/1/182549.html http://indiatoday.intoday.in/story/salinity-river-royal-bengal-tiger-lose-sheen-weight/1/182549.html