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Description |
Geographic Range [top]
Range Description: Assiminea brevicula is distributed widely in Asia; India, Sri Lanka, Philippines, China (including Hong Kong), Taiwan, Malaysia, Indonesia, Myanmar, Singapore, Thailand, Viet Nam, Japan and Thailand.
Within these countries it is specifically known from West Bengal, Maharashtra and the Andaman Islands in India; Manila, Luzon Island, Busuanga Island, Masbate Island, Negros Island, Samar Island, Cebu Island and Mindanao Island in the Philippines; Java, Sumatra, Brunei and Kalimantan in Indonesia; Sabah and Sarawak in Malaysia; and the Irrawaddy Delta in Myanmar (Abbott 1958).
Countries occurrence:
Native:
Bangladesh; China; Hong Kong; India (West Bengal); Japan; Malaysia; Myanmar; Philippines; Singapore; Sri Lanka; Taiwan, Province of China; Thailand; Viet Nam
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: This species appears to be common. Berry (1964 in Brown 1971) recorded up to 243 individuals of this species from 1 m² of mud surface in a Malaysian mangrove swamp. Murty and Balaparameswara Rao (1976) describe the species as common in the south Indian and Malaysian mangrove swamps; Sasekumar and Chong (1998) found this to be the most abundant species recorded in their study of faunal diversity in Malaysian mangroves; and Lin et al. (2006) found it to be the dominant species in their study of the macrofaunal community in Fenglin mangrove area, Xiamen, China.
There are some short term studies in Thailand which deal with populations in different sampling sites within the region (Sri-aroon et al. 2005). In Hugli-Matla estuary the population density recorded was 200-1000 individuals per m2 (A. Dey pers. comm.). No information on population trend is available.
Current Population Trend: Unknown
Additional data:
?Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology: This estuarine species is common in the more sheltered parts of mangroves and nipa-palm swamps, and the muddy areas in monsoon drains. It can be found either crawling on the mud or remaining attached to grass in all muddy localities. Its vertical distribution is restricted to 10 m downward from the high water mark. Its shell is usually bright red but occasionally black. It probably feeds mainly on algae (Brown 1971, Brandt 1974, Subba Rao et al. 1992, Tan and Ng 1992).
Abbott (1958) collected this species from wet logs on the muddy banks of the estuarine exit of Bantayan River, north coast of Samar Island, Philippines. He stated that the area is alternately covered by saltwater at high tide and freshwater during low tide. Choy and Booth (1994) documented that this species disappears completely during periods of flooding, but it quickly recovers its pre-flood population levels.
Systems: Freshwater; Marine
Use and Trade [top]
Use and Trade: No information on use or trade of this species is available.
Threats [top]
Major Threat(s): No specific threat has been identified.
Conservation Actions [top]
Conservation Actions: Threats and impacts of threats to the species need to be studied.
Citation: Madhyastha, A. & Daniel, B.A. 2010. Assiminea brevicula. The IUCN Red List of Threatened Species 2010: e.T166756A6276391. http://dx.doi.org/10.2305/IUCN.UK.2010-4.RLTS.T166756A6276391.en. Downloaded on 25 January 2016.
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