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Description |
Eastern Indian Ocean and Western Pacific: Tamil Nudu, India to Myanmar and Phuket, Thailand; then from Taiwan to Indonesia and New Caledonia.
Geographic Range [top]
Range Description: Polydactylus microstomus is an Indo-Pacifc threadfin. In the Indian Ocean, this species is known from Tamil Nadu (India), Sri Lanka, Myanmar and Phuket Island, Thailand. In the west Pacifc, P. microstomus is distributed from Taiwan to New Caledonia (excluding Australia).
Countries occurrence:
Native:
India; Indonesia; Myanmar; New Caledonia; Papua New Guinea; Philippines; Sri Lanka; Taiwan, Province of China; Thailand
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern; Pacific – northwest; Pacific – western central
Additional data:
? Lower depth limit (metres): 55
? Upper depth limit (metres): 2
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: Polydactylus microstomus is reported to be relatively common in the western part of Indonesia and the Philippines.
Current Population Trend: Decreasing
Additional data:
? Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology: Polydactylus microstomus inhabits turbid coastal waters, estuaries, mangrove creeks, and mangrove-lined rivers (Motomura and Iwatsuki 2001). It feeds mainly on small crustaceans, fish, and benthic organisms. Some specimens of this species are known to be hermaphrodites. This species is epipelagic and is found in the euphotic zone at depths of 2–55 m.
Systems: Marine
Threats [top]
Major Threat(s): Polydactylus microstomus is associated with mangrove habitats. The mangrove habitats of Asia have been significantly threatened by human population pressures, large-scale harvest for wood chips, and conversion to aquaculture ponds. To date, 36% of Asian mangrove forests have been lost (Valiela et al. 2001).
Conservation Actions [top]
Conservation Actions: There are no species-specific conservation measures in place for Polydactylus microstomus. However, the distribution of this species may fall within numerous designated marine protected areas, including the Sirinath National Park, Phuket, Thailand.
Monitoring of this species and its habitat status is needed, to determine if the degradation of mangrove habitats will have a negative impact the population of P. microstomus in the future.
Citation: Motomura, H. 2010. Polydactylus microstomus. The IUCN Red List of Threatened Species 2010: e.T155164A4733473. http://dx.doi.org/10.2305/IUCN.UK.2010-4.RLTS.T155164A4733473.en. Downloaded on 11 November 2016.
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