Rare Singapore swamp forest crab species gets boost in the wild with release of captive-bred specimens

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Rare Singapore swamp forest crab species gets boost in the wild with release of captive-bred specimens
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The 20 crabs were hatched in captivity by NParks as part of efforts to restock the wild population. Read more at straitstimes.com.

SINGAPORE - Work is under way to shore up the wild numbers of a rare crab species found only in and around Singapore’s last freshwater swamp forest.were released into a stream at an undisclosed nature park.

Efforts to restock dwindling populations of wild crab species in Singapore began in 2014, starting with the most endangered of the three freshwater crabs – the pebble-sizeThe other crab is the Johnson’s freshwater crab, which is also endangered. All three species are found nowhere else in the world. Freshwater crabs play a key role in the ecosystem by releasing nutrients into streams when they feed on leaf litter – their main food source – and breaking down leaves for other animals to eat.

Since the breeding programme began in 2018, researchers have observed the crabs and realised the animal could tolerate conditions less acidic than the slow-flowing waters of the swamp forest habitat, which meant the crabs could be suited for life outside the Nee Soon Swamp Forest. Before Tuesday’s crustacean release, NParks staff had also released two sets of crab offspring in Nee Soon Swamp Forest, keeping about 80 crabs for research.

He said: “If we find that the crabs have grown bigger, we will introduce more to establish a population.”There was some concern over scavenging crabs competing with another freshwater crab species in the area for food, but Dr Ng said the overlap between the two species is likely to be small, given their size difference.

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