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Acanthurus bariene

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII PERCIFORMES ACANTHURIDAE

Scientific Name: Acanthurus bariene
Species Authority: Lesson, 1831
Common Name(s):
English Roundspot Surgeonfish, Eye-spot Surgeon, Black-spot Surgeonfish, Bariene Surgeonfish
Synonym(s):
Acanthurus kingii Bennett, 1835
Acanthurus nummifer Valenciennes, 1835

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2010-05-03
Assessor(s): Choat, J.H., Abesamis, R., Clements, K.D., McIlwain, J., Myers, R., Nanola, C., Rocha, L.A., Russell, B. & Stockwell, B.
Reviewer(s): Davidson, L., Edgar, G. & Kulbicki, M.
Justification:
Acanthurus bariene is widespread in the western Pacific. It is common and locally abundant in parts of its range. Adults are occasionally found in fish markets and juveniles are harvested for the aquarium trade. Although it is targeted in areas where overfishing and illegal fishing practices are known to occur, adults inhabit deeper waters in depths greater than 10m on outer reef slopes and drop offs. It occurs in a number of  marine reserves in parts of its range and there is no indication of population declines through fishing. It is therefore listed as Least Concern.






Geographic Range [top]

Range Description: Acanthurus bariene is found from the Ryukyu Islands, Japan, southwards to the Great Barrier Reef, Australia (Ashmore Reef, Timor Sea, Western Australia (12°15'S) and Lizard Island, Queensland (14°40'S), eastwards to the Solomon Islands and westwards to the Seychelles. It was recently recorded from Christmas Island (J.H. Choat pers. comm. 2010).
Countries:
Native:
Australia; British Indian Ocean Territory; Brunei Darussalam; Cambodia; China; Christmas Island; Comoros; Disputed Territory (Paracel Is., Spratly Is.); Fiji; Hong Kong; India (Andaman Is., Nicobar Is.); Indonesia; Japan; Malaysia; Maldives; Mayotte; Micronesia, Federated States of ; Myanmar; Palau; Papua New Guinea; Philippines; Seychelles; Singapore; Solomon Islands; Taiwan, Province of China (Taiwan, Province of China (main island)); Thailand; Timor-Leste; Viet Nam
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern; Indian Ocean – western; Pacific – northwest; Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Acanthurus bariene was recorded as rare in terms of relative abundance in the northern Bismarck Sea and Milne Bay, Papua New Guinea (Allen 2003, 2009). It is occasionally found in Raja Ampat (Allen 2003b). It is common and locally abundant in the Philippines (C. Nanola pers. comm. 2010).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: Acanthurus bariene is generally found in depths greater than 10 m and extending to at least 50 m on outer reef slopes and drop offs. It is usually seen as solitary individuals grazing on reefs or compact sand surfaces and is relatively easy to approach underwater (Randall 2001). It is found singly or in pairs. It feeds on algal film on bare rocks and sand. Juveniles are found in shallow protected reefs, usually between soft coral, in 0.2-3 m depth (Lieske and Myers 1994). It is classified as a grazer/detritivore (J.H. Choat and D.R. Bellwood pers. obs. in Green and Bellwood 2009). A. bariene was found to be confined to deeper sandstone reefs in Bar Reef Marine Sanctuary (BRMS), northwestern Sri Lanka (Ohman et al. 1997).

The sexes are separate among the acanthurids and there is no evidence of sexual dimorphism (Reeson 1983).
Systems: Marine

Use and Trade [top]

Use and Trade: Acanthrus bariene is occasionally seen in fish markets. It is a targeted food fish in western Thailand (Allen 2005) and in the Philippines (R. Abesamis and C. Nanola pers. comm. 2010). It is harvested for the aquarium trade, selling for $69.99 - $449.95 (L. Rocha pers. comm. 2010).

Threats [top]

Major Threat(s): The range of this species overlaps the Coral Triangle where it is a targeted food fish. It is found in an area with known prevalence of illegal fishing practices and overfishing.

Surgeonfishes show varying degrees of habitat preference and utilization of coral reef habitats, with some species spending the majority of their life stages on coral reef while others primarily utilize seagrass beds, mangroves, algal beds, and /or rocky reefs. The majority of surgeonfishes are exclusively found on coral reef habitat, and of these, approximately 80% are experiencing a greater than 30% loss of coral reef area and degradation of coral reef habitat quality across their distributions. However, more research is needed to understand the long-term effects of coral reef habitat loss and degradation on these species' populations. Widespread coral reef loss and declining habitat conditions are particularly worrying for species that recruit into areas with live coral cover, especially as studies have shown that protection of pristine habitats facilitate the persistence of adult populations in species that have spatially separated adult and juvenile habitats (Comeros-Raynal et al. 2012).

Conservation Actions [top]

Conservation Actions: There are no species-specific conservation measures in place for this species. Its distribution overlaps several marine protected areas in parts of its range.

Citation: Choat, J.H., Abesamis, R., Clements, K.D., McIlwain, J., Myers, R., Nanola, C., Rocha, L.A., Russell, B. & Stockwell, B. 2012. Acanthurus bariene. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 21 September 2014.
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