Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Chondrichthyes Rajiformes Dasyatidae

Scientific Name: Dasyatis microps
Species Authority: (Annandale, 1908)
Common Name(s):
English Smalleye Stingray
Trygon microps Annandale, 1908

Assessment Information [top]

Red List Category & Criteria: Data Deficient ver 3.1
Year Published: 2009
Date Assessed: 2007-01-01
Assessor(s): Fahmi, White, W.T., Manjaji, M. & Peirce, S.
Reviewer(s): Valenti, S.V. & Séret, B. (Shark Red List Authority)
The Smalleye Stingray (Dasyatis microps) is a large stingray (at least 320 cm TL and 222 cm DW) which occurs in estuarine, river mouth and coastal areas, but may also occur in deep waters too. It is reported from India, throughout areas of southeast Asia, to northern Australia. New records from Mozambique suggest that it may be more widely distributed in the Indo-Pacific than previously considered. It is apparently rare in Indonesia, and may be rare throughout the rest of its range, but no information is available to determine historical population trends. The full depth range and its preferred habitat are poorly known, making it difficult to evaluate the potential impact of fisheries on this species. Inshore fishing pressure is intense throughout large areas of its known distribution, but without further information on this species' depth range, habitat, biology and capture in fisheries it is not possible to assess it beyond Data Deficient.

Geographic Range [top]

Range Description: Indian Ocean to Western Pacific: India and Bangladesh (including Ganges river) (Annandale 1908, Ishihara et al. 1998, Kapoor et al. 2002), Maldives (Adam 1998), Gulf of Thailand, Malaysia (Sabah and Sarawak) (Mohsin and Amnak 1996) and Indonesia (Borneo). One record from northern Australia (Last and Compagno 1999, G. Yearsley pers. comm. 2008). Also likely occurs in areas in between (Last and Compagno 1999). This species was also recently recorded from Mozambique, representing a western range extension of more than 5,000 km, indicating that it is likely to be more widespread in the Indo-Pacific than previously considered (Pierce et al.2008).
Countries occurrence:
Australia (Northern Territory); Bangladesh; India; Indonesia (Kalimantan); Malaysia (Sabah, Sarawak); Maldives; Mozambique; Thailand
FAO Marine Fishing Areas:
Indian Ocean – eastern; Indian Ocean – western; Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The scarcity of recorded observations suggests that D. microps is rare and possibly patchily distributed (Pierce et al. 2008). Frequently sighted around reefs in southern Mozambique. In Indonesia it seems that this species is scarce, but no information is available to determine historical population trends.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: A large species found in coastal waters and river mouths (Kapoor et al. 2002). However it is also reported in deeper waters. No specific information is available on the full depth range of this species and its preferred habitat is poorly known. The species may extend into deep water and further investigation is required into its full bathymetric range. Attains disc widths of up to 222 cm (Garman 1913). The very large size of this species suggests that it may be more biologically vulnerable to population depletion than smaller stingrays. Observations of this species in mid-water off Mozambique indicate that this species is possibly a semi-pelagic species which may also account for its rarity in catches throughout its range compared to other dasyatid species (Pierce et al. 2008).
Systems: Marine

Threats [top]

Major Threat(s): Probably taken as bycatch by bottom longline, trammel net and trawl fisheries throughout its range. In Indonesia, this species is caught occasionally as utilized bycatch in trawl and the Danish seine fisheries operating in west (between Natuna and Karimata Islands) and south Kalimantan waters (Fahmi pers. obs. 2007). This species were recorded only twice at the Danish seine fishery during studies of catches in August 2005 and May 2007 (two individuals were captured measuring 222 cm DW and 245 cm TL). It is utilized for its meat and cartilage in Indonesia. One individual caught by artisanal spear-fishers in August 2006 in southern Mozambique (Pierce et al. 2008). Inshore fishing pressure is intense throughout large areas of its geographic range, but the species may occur deeper than is currently known, offering refuge from fisheries.

Conservation Actions [top]

Conservation Actions: None currently in place. Collection of quantitative artisanal catch data on this species and other rare species is needed to provide better data for estimating population trends.

Citation: Fahmi, White, W.T., Manjaji, M. & Peirce, S. 2009. Dasyatis microps. The IUCN Red List of Threatened Species 2009: e.T161582A5457392. . Downloaded on 09 October 2015.
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