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Ctenochaetus flavicauda

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA ACTINOPTERYGII PERCIFORMES ACANTHURIDAE

Scientific Name: Ctenochaetus flavicauda
Species Authority: Fowler, 1938
Common Name(s):
English Whitetail Bristletooth
Taxonomic Notes: Ctenochaetus flavicauda is closely related to C. cyanocheilus (K.D. Clements pers. comm. 2010).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2010-05-07
Assessor(s): Clements, K.D., Choat, J.H., Abesamis, R., McIlwain, J., Myers, R., Nanola, C., Rocha, L.A., Russell, B. & Stockwell, B.
Reviewer(s): Edgar, G. & Kulbicki, M.
Justification:
Ctenochaetus flavicauda is widely distributed in the central Pacific and common in parts of its distribution. It is not specifically targeted and is a minor component of the aquarium trade. There are no major threats known and it occurs in marine reserves in parts of its range. It is therefore listed as Least Concern.

Geographic Range [top]

Range Description: Ctenochaetus flavicauda is found in the central Pacific from the Phoenix Islands through Cook Islands and French Polynesia to Pitcairn Island, north to Line Islands and south to Rapa.
Countries:
Native:
Cook Islands; French Polynesia; Kiribati (Kiribati Line Is., Phoenix Is.); Pitcairn; United States Minor Outlying Islands (US Line Is.)
FAO Marine Fishing Areas:
Native:
Pacific – eastern central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Ctenochaetus flavicauda is common outside the fringing reef at Tubuai, Rurutu, Raivavae, Rapa, and the Cook Islands (Randall and Clements 2001). It is rare in the American Samoa National Park (National Park of Samoa Checklist of Fishes accessed 21 April 2010).
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The genus Ctenochaetus feed on fine detrital material. They whisk the sand or rocky substratum with their teeth and utilize suction to draw in the detrital material that consists of diatoms, small fragments of algae, organic material and fine inorganic sediment (Randall and Clements 2001).  Species of Ctenochaetus share the presence of a thick-walled stomach (Randall and Clements 2001), this character is significant with respect to the nutritional ecology of this genus (Choat et al. 2002b).

The sexes are separate among the acanthurids (Reeson 1983). Acanthurids do not display obvious sexual dimorphism, males assume courtship colours (J.H. Choat pers. comm. 2010).
Systems: Marine

Use and Trade [top]

Use and Trade: Ctenochaetus flavicauda is a minor component of the marine aquarium trade. The price listed online was $69.95 (L. Rocha pers. comm. 2010).

Threats [top]

Major Threat(s): There are no major threats known for this species.

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. However, its distribution overlaps with several marine protected areas within its range.

Bibliography [top]

Choat, J.H., Clements, K.D. and Robbins, W.D. 2002b. The trophic status of herbivorous fishes on coral reefs. 1. Dietary analyses. Marine Biology 140: 613-623.

Comeros-Raynal, M.T., Choat, J.H., Polidoro, B., Clements, K.D., Abesamis, R., Craig, M.T., Lazuardi, M.E., McIlwain, J., Muljadi, A., Myers, R.F., et al.. 2012. The likelihood of extinction of iconic and dominant components of coral reefs: the parrotfishes and surgeonfishes. PLoS ONE http://dx.plos.org/10.1371/journal.pone.0039825.

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.2). Available at: http://www.iucnredlist.org. (Accessed: 17 October 2012).

National Park of American Samoa. 2008. Fishes of National Park of American Samoa Checklist of Fishes Family Name Listing. Available at: http://www.botany.hawaii.edu/basch/uhnpscesu/htms/npsafish/family/acanthur.htm. (Accessed: 21 April).

Randall, J.E. 2001a. Surgeonfishes of the world. Mutual Publishing and Bishop Museum Press, Hawai'i, Honolulu, Hawaii.

Randall, J.E and Clements, K.D. 2001. Second revision of the surgeonfish genus Ctenochaetus (Perciformes: Acanthuridae), with descriptions of two new species. Indo-Pacific Fishes 32: 33.

Reeson, P.H. 1983. The biology, ecology and bionomics of the surgeonfishes, Acanthuridae. In: J.L. Munro (ed.), Caribbean coral reef fishery resources, pp. 178-190.


Citation: Clements, K.D., Choat, J.H., Abesamis, R., McIlwain, J., Myers, R., Nanola, C., Rocha, L.A., Russell, B. & Stockwell, B. 2012. Ctenochaetus flavicauda. The IUCN Red List of Threatened Species. Version 2014.2. <www.iucnredlist.org>. Downloaded on 28 August 2014.
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