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Carcharhinus amblyrhynchoides

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA CHONDRICHTHYES CARCHARHINIFORMES CARCHARHINIDAE

Scientific Name: Carcharhinus amblyrhynchoides
Species Authority: (Whitley, 1934)
Common Name/s:
English Graceful Shark
Synonym/s:
Carcharhinus amblyrhinchoides (Whitley, 1934) [orth. error]
Gillisqualus amblyrhynchoides Whitley, 1934

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2009
Date Assessed: 2005-10-01
Assessor/s: Simpfendorfer, C.
Reviewer/s: Musick, J.A. & Fowler, S.L. (Shark Red List Authority)
Justification:
This assessment is based on the information published in the 2005 shark status survey (Fowler et al. 2005).

The Graceful Shark (Carcharhinus amblyrhynchoides) is a little-studied, coastal Indo-West Pacific species that is caught in commercial fisheries, but not as a targeted species. There is no evidence that this species faces a high extinction risk under the IUCN Criteria, but it has been impacted by fishing. Further research is required on its life history to aid in the assessment of this species.

Geographic Range [top]

Range Description: This species occurs in continental shelf waters of the tropical Indo-West Pacific, including Australia, Indonesia, the Philippines, Viet Nam, China, Thailand, India, Sri Lanka and the Gulf of Aden (Compagno 1984, Parry-Jones 1996). Distribution records from this region are not continuous. However, given its relatively low abundance, and morphological similarity to other more abundant species of Carcharhinus, its distribution is likely to be continuous through southern Asia.
Countries:
Native:
Australia; China; India; Indonesia; Philippines; Somalia; Sri Lanka; Thailand; Viet Nam; Yemen
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern; Indian Ocean – western; Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: This species is found on continental and insular shelves.

Information on the ecology and life history of the Graceful Shark is scant. The only available data are from the waters of northern Australia. The largest recorded size for this species is 167 cm from the Gulf of Thailand (Garrick 1982), while the largest size from Australian waters is 162 cm (Stevens and McLoughlin 1991). Males and females mature at 110?115 cm and probably mate each year. Litter size ranges from 1?9 pups, with a mean of three and the size at birth is 50?60 cm (Last and Stevens 1994). Mating probably occurs in February and ovulation in March or April. The gestation period is 9?10 months with parturition occurring in January and February (Stevens and McLoughlin 1991).

The Graceful Shark's diet is composed mostly of bony fishes. Stevens and McLoughlin (1991) reported fish from 91% of specimens with food in the stomach, while crustaceans occurred in 6% and cephalopods in 4%. In a study of predatory fish around Groote Eylandt in Australia?s Gulf of Carpentaria, Brewer et al. (1995) reported that 88.5% of specimens with food in the stomach had consumed fish, 1.3% crabs and 8.5% cephalopods. Over 60% of the fish eaten were from the family Carangidae.
Systems: Marine

Threats [top]

Major Threat(s): This shark is caught regularly in gillnet and longline fisheries throughout its range. In northern Australia, Lyle and Timms (1984) reported that in gillnets C. amblyrhynchoides made up 1.5% of the shark catch by numbers and 2.7% by weight. Lyle and Griffin (1987) reported that in longline catches in northern Australia it comprised 0.2% of the shark catch by number and 0.6% by weight. Current levels of the catch of sharks in northern Australia are low. However, catch levels during the 1970s and 1980s were considerably higher when foreign gillnet vessels operated in the fishery. Foreign vessels caught up to 17,000 t of sharks annually during this period (Bentley 1996), but ceased fishing in Australian waters in 1986 when the length of gillnets was restricted.

Records of C. amblyrhynchoides catches in other countries are scant. Parry-Jones (1996) reported landings in China, and Keong (1996) reported their occurrence in fish markets in Thailand. Catches are probably also taken by commercial fisheries in India and Sri Lanka (Compagno 1984b). The Graceful Shark is exploited for its flesh and fins. There is no information available on the impact of fishing on C. amblyrhynchoides stocks.

Conservation Actions [top]

Conservation Actions: Currently there are no conservation or management measures targeted at this species. In northern Australia shark fisheries are regulated limiting the exploitation of this species.
Citation: Simpfendorfer, C. 2009. Carcharhinus amblyrhynchoides. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 24 April 2014.
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