|Scientific Name:||Chaetodon trifascialis Quoy & Gaimard, 1825|
Chaetodon bifascialis Cuvier, 1829
Chaetodon leachii Cuvier, 1831
Chaetodon striangulus Cuvier, 1831
Chaetodon strigangulus Cuvier, 1831
Chaetodon strigangulus Lay & Bennett, 1839
Chaetodon tearlachi Curtiss, 1938
Chaetodon triangularis Rüppell, 1829
Eteira taunayi Kaup, 1860
Megaprotodon strigangulus (Cuvier, 1831)
Megaprotodon trifascialis (Quoy & Gaimard, 1825)
|Red List Category & Criteria:||Near Threatened ver 3.1|
|Assessor(s):||Carpenter, K.E. & Pratchett, M.|
|Reviewer(s):||Elfes, C., Polidoro, B., Livingstone, S. & Carpenter, K.E.|
This is a widespread species with a strong dependency on corals that have undergone widespread population declines ranging from 20 to 37% because of coral reef loss. It has been eliminated on reefs that undergo massive bleaching events. Chaetodon trifascialis has a strong dependency on a species of coral (Acropora hyacinthus) that is listed as Near Threatened and although it has been seen to feed on at least 14 other coral species variously listed as Least Concern (seven species), Near Threatened (six species) and Vulnerable (one species), all of these corals have shown substantial population declines because of coral reef loss throughout the Indo-Pacific. We infer that population declines of C. trifascialis are similar to those of A. hyacinthus (and other species it feeds on) and therefore list this species as Near Threatened (nearly meeting VU A3ce with an estimated generation length of between six and seven years).
|Range Description:||This species is very widespread throughout the Indo-west and central Pacific, from the Red Sea to the Society Islands. North to southern Japan, and south to Lord Howe Island and Rapa (Pyle 2001, G.R. Allen pers. comm. 2006). It has been recorded as a vagrant from the Hawaiian Islands. The range size is ~76.2 million km2, from values estimated by Jones et al. (2002) based on projections of distribution maps from Allen et al. (1998). It is found at depths of 2-30 m.|
Native:American Samoa; Australia (Lord Howe Is.); Bangladesh; British Indian Ocean Territory; China; Christmas Island; Cocos (Keeling) Islands; Comoros; Cook Islands; Djibouti; Egypt; Eritrea; Fiji; French Polynesia; French Southern Territories (Mozambique Channel Is.); Guam; India (Andaman Is., Nicobar Is.); Indonesia; Israel; Japan; Jordan; Kenya; Kiribati (Kiribati Line Is., Phoenix Is.); Madagascar; Malaysia; Maldives; Marshall Islands; Mauritius; Mayotte; Micronesia, Federated States of ; Mozambique; Myanmar; Nauru; New Caledonia; Niue; Norfolk Island; Northern Mariana Islands; Oman; Palau; Papua New Guinea; Philippines; Réunion; Samoa; Saudi Arabia; Seychelles; Singapore; Solomon Islands; Somalia; South Africa; Sri Lanka; Sudan; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Tokelau; Tonga; Tuvalu; United States Minor Outlying Islands (Howland-Baker Is., Johnston I., US Line Is.); Vanuatu; Viet Nam; Wallis and Futuna; Yemen
Vagrant:United States (Hawaiian Is.)
|FAO Marine Fishing Areas:|
Indian Ocean – western; Indian Ocean – eastern; Pacific – eastern central; Pacific – northwest; Pacific – southwest; Pacific – western central
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||It is generally common (e.g., mean of 0.66 individuals per 200 m2 in northern |
|Current Population Trend:||Decreasing|
|Habitat and Ecology:|
Chaetodon trifascialis is an obligate corallivore with a strong preference and apparent survival dependency (Berumen and Pratchett 2008) on Acropora hyacinthus but it has also been observed feeding on: A. intermedia (now recognized as A. nobilis and A. formosa), A. gemmifera, A. millepora, A. florida, A. cytherea, A. tenuis, A. robbusta, A. cerialis (Pratchett 2005), A. clathrata, P. damicornis (Graham 2007), A. aspera (Reese 1981), Stylophora pistillata, and Pocillopora eydouxi (Samways 2005). Most commonly occurs singly, sometimes also in pairs.
|Generation Length (years):||6|
|Use and Trade:||This species is occasionally exported through the aquarium trade, however it usually starves when kept in captivity (Pyle 2001).|
Chaetodon trifascialis is an obligate corallivore on a number of corals that are susceptible to bleaching events and have undergone population declines throughout the Indo-Pacific ranging from 20 to 37% because of reef loss and have been assessed under Red List Criteria (Carpenter et al. 2008). It has been observed feeding on: Acropora hyacinthus (with a strong preference and apparent survival dependency); A. intermedia (now recognized as A. nobilis and A. formosa); A. gemmifera; A. millepora; A. florida; A. cytherea; A. tenuis; A. robbusta; A. cerialis (Pratchett, 2005); A. clathrata; P. damicornis (Graham, 2007); A. aspera (Reese, 1981); Stylophora pistillata; and Pocillopora eydouxi (Samways, 2005). On reefs where it was observed in transects, it has been completely absent from transects after massive bleaching events (Pratchett et al. 2006).
|Conservation Actions:||There appear to be no species-specific conservation measures in place. This species is present within marine protected areas. Monitoring of this species is needed in conjunction with coral monitoring, as well as determination of the degree of co-dependence between this species and corals.|
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Berumen, M.L. and Pratchett, M.S. 2006. Recovery without resilience: persistent distrubance and long-term shifts in the structure of fiosh and coral communities at Tiahura Reef, Moorea. Coral Reefs 25: 647-653.
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Pratchett, M.S. and Berumen, M.L. 2008. Interspecific variation in ditributions and diets of coral reef butterflyfishes (Teleostei: Chaetodontidae). Journal of Fish Biology 73: 1730-1747.
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Pratchett, M.S., Wilson, S.K. and Baird, A.H. 2006. Declines in the abundance of Chaetodon butterflyfishes following extensive coral depletion. Journal of Fish Biology 69: 1269-1280.
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Reese, E.S. 1981. Predation on corals by fishes of the family Chaetodontidae: implications for conservation and management of coral reef ecosystems. Second International Symposium on Biology and Management of Tropical Shallow Water Communities (coral reefs, bays and estuaries), 20 July - 2 August 1980: 594-604.. Papua New Guinea.
Samways, M.J. 2005. Breakdown of butterflyfish (Chaetodontidae) territories associated with the onset of a mass coral bleaching event. Aquatic Conservation: Marine and Freshwater Ecosystems 15(S1): S101 - S107.
|Citation:||Carpenter, K.E. & Pratchett, M. 2010. Chaetodon trifascialis. The IUCN Red List of Threatened Species 2010: e.T165712A6098323.Downloaded on 18 December 2017.|