Platyrhina sinensis 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Chondrichthyes Rajiformes Platyrhinidae

Scientific Name: Platyrhina sinensis (Bloch & Schneider, 1801)
Common Name(s):
English Fanray
Platyrhina limboonkengi Tang, 1933

Assessment Information [top]

Red List Category & Criteria: Vulnerable A4bcd ver 3.1
Year Published: 2009
Date Assessed: 2008-12-01
Assessor(s): Ishihara, H., Wang, Y., Tanaka, S. & Nakaya, K.
Reviewer(s): Valenti, S.V. & Fowler, S.L. (Shark Red List Authority)
The Fanray (Platyrhina sinensis) is a benthic ray is endemic to the northwest and western central Pacific, occurring from Japan to Vietnam and possibly Indonesia. It is restricted to inshore waters to depths of 100 m (but most commonly at 30–40 m). It is a utilised bycatch of gillnet, coastal set-net and trawl fisheries, and is very easily captured in almost any coastal fishery. Although not targeted, the catch is often retained and sold. Its susceptibility to capture in a variety of fishing gears and preference for inshore sandy habitats that are generally heavily fished make it vulnerable to depletion. It is reported to have declined in both abundance and extent of occurrence in the East China Sea, where it was, formerly, commonly captured by bottom trawls. In southern Japan, at the northern edge of its range, it is reportedly still common. Although no specific information on population trends is available from the southern half of its range, inshore fisheries are intense there and this species, like many other batoids in the region, is likely to have declined. The species is therefore assessed as Vulnerable globally, on the basis of a continuing decline in abundance and area of occurrence, over the three generations. Further investigation is required into catch levels and population trends throughout the species’ range.

Geographic Range [top]

Range Description:Northwest and western central Pacific: Japan, China, Taiwan (Province of China), Korea, Vietnam and may be present in Indonesia (Compagno 1998).
Countries occurrence:
China; Japan (Hokkaido, Honshu, Kyushu, Nansei-shoto, Ogasawara-shoto, Shikoku); Korea, Democratic People's Republic of; Korea, Republic of; Taiwan, Province of China (Taiwan, Province of China (main island)); Viet Nam
FAO Marine Fishing Areas:
Pacific – northwest; Pacific – western central
Additional data:
Lower depth limit (metres):100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Little specific information is available on the population of this species, although it is reported to have declined in the East China Sea (see Threats section).
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This benthic ray is found inshore, from the surface to depths of 100 m on rock or rocky sand bottoms, but is most common at 30–40 m depth (Yamada et al. 2007). It prefers coastal areas, on fine sandy substrates (Yamada et al. 2007). It reaches a maximum size of 68 cm total length (TL) (Compagno 1998). A recent study suggests that females reach maturity at 3–5 years of age and 39.2 cm total length (TL), and males at 2–4 years and 37.1 cm TL (Yamaguchi et al. unpublished data). Longevity in females is reported at 12 years and five years in males (Yamaguchi et al. unpublished data). P. sinensis feeds on small shrimps, mysids and small fish (Yamaguchi et al. unpublished data).

Use and Trade [top]

Use and Trade: Utilised bycatch.

Threats [top]

Major Threat(s): This species is taken as utilised bycatch in gillnet, coastal set-net, trawl fisheries, and almost all fishery types operating in shallow waters (Y. Wang pers. obs.). All bycatch is utilised in some areas of the species’ range, whereas it is discarded in other areas (Y. Wang pers. obs., Yamaguchi unpublished data). Yamada et al. (2007) report that this species was formerly caught by bottom trawl fisheries in the East China Sea, but has declined both in terms of abundance and extent of occurrence. However, in Shimoda, Izu Peninsula, southern Japan (at the northern extent of this species’ range), it is reportedly still common (S. Tanaka pers. comm.). Historical fishing pressure has been high throughout the much of its range and exploitation is continuing in many areas of this species’ inshore habitat. For example, fishing pressure on batoids is intensive in the South China Sea. Its preference for shallow waters and slow movement mean it is easily captured in demersal fisheries and vulnerable to depletion.

Conservation Actions [top]

Conservation Actions: There are no known conservation or management measures for this species. Assessment and monitoring of population trends throughout this species’ range is required.

Citation: Ishihara, H., Wang, Y., Tanaka, S. & Nakaya, K. 2009. Platyrhina sinensis. The IUCN Red List of Threatened Species 2009: e.T161589A5458790. . Downloaded on 15 October 2018.
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