Scientists provide the lifeline for the world’s rarest watchdog

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PARIS: Hainan Gibbon – the rarest Prague on Earth – was already on the edge of extinction in 2014 when their island oasis was devastated by the most powerful storm to lick China’s coast in half a century.
Decades of economic growth, along with logging and deforestation, had reduced their habitat by more than half.
The primary forests that remained were also fragmented, further hemming in the tailless apps, which go especially above ground.
But the massive mausoleids carried out by super typhoon Ramamasan made things worse, affecting the 15-meter-wide lanes in the mountain forest and effectively cutting its treetop highways.
According to Bosco Pui Lok Chan, head of the Kadori Farm and Botanic Gardens, “canopy connectivity is important for ribbons, as they are strictly.” HogcogThe new area, told AFP.
“Forest fragmentation thus presents a major conservation challenge for the ribbon.”
After the thunderstorm, Chan and his team – only a few dozen of those accused of protecting the ribbon live in the forest – noticed that they had trouble crossing these new gaps in the forest.
And when he did, “he included very risky routes including lots of long jumps and high places among some living trees,” he said.
Then Chan had a light-bulb moment.
“We built a two-way canopy rope bridge across the damaged vaulted highway,” he said.
The “bridge” consists of two parallel ropes at both ends of the tree.
Conservationists installed motion cameras to record any movement on or across the ropes.
The group of nine Gibbons most affected by this particular gush in the forest did not immediately take advantage of the lifeline.
Indeed, only 176 days later the cameras captured the first image of a gibbon on the ropes.
After that first crossing, however, others quickly followed suit.
Parts of mountaineering-grade ropes, such as tight-rope walkers, while others are tied down, swinging arm.
Ribbons roaming in a forest canopy using this method have been observed over 50 kilometers (30 mi) in an hour.
Another favorite technique was walking across a rope, while the other was holding onto an overhead.
Over 470 days of surveillance, researchers collected more than 200 photographs and 50 videos of acrobat apes in action.
Chan described rope bridges as a “short-term solution”.
“Re-integration with native tree species should be a priority to restore forest species,” he said.
But his stop-gap measure still “has significant conservation implications for other Gibbon species,” he said.
There are 20 identified gibbon species throughout Asia. Most are “endangered” or “critically endangered” – the last stage before “extinct in the wild” – in IUCN’s Red List of Endangered Species.
Hainan Gibbon – Nomuscus Hainanus – is endemic to the Chinese island, and now only found in the Hainan Bwangling National Nature Reserve.
Researchers reported that they had a population of 2,000 people in the 1950s, but their numbers fell to single digits during the 1970s.
Adult males are jet black with a hairy crest, while females are golden yellow with a black crown.
Most Gibbons are monogamous, but An. Henanus live in families with one male, two female and immature offspring.
At dawn the duo are known for singing, possibly to mark their territory and enhance relationships, earlier research has revealed.

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