Scarus quoyi 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Actinopterygii Perciformes Labridae

Scientific Name: Scarus quoyi Valenciennes, 1840
Common Name(s):
English Quoy's Parrotfish, Green-blotched Parrotfish
Callyodon hadji Seale, 1910
Callyodon mutabilis Gronow, 1854
Pseudoscarus moresbyensis Macleay, 1883
Scarus chrysopomus Bleeker, 1847
Taxonomic Notes: Westneat and Alfaro (2005) recognize the Scarini as a tribe within the family Labridae. The genera Chlororus and Scarus are two distinct monophyletic lineages (Smith et al. 2008).

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2012
Date Assessed: 2009-09-18
Assessor(s): Myers, R., Choat, J.H., Russell, B., Clements, K.D., Rocha, L.A., Lazuardi, M.E., Muljadi, A., Pardede, S. & Rahardjo, P.
Reviewer(s): McIlwain, J. & Craig, M.T.
This species is widespread in the Indo-Pacific. It is a component of subsistence fisheries and is targeted in parts of its range. There have been 60% reductions in the past 20-30 years in at least one part of its range in the central Philippines. There are no indications of population declines through harvesting elsewhere in its distribution. It is found in a number of marine reserves. It is therefore listed as Least Concern. Although there are numerous marine reserves in areas where this species is heavily fished (Coral Triangle Region), most reserves are not very well managed. However, in well-managed reserves parrotfishes tend to recover comparatively quickly and therefore increased management in protected areas and potentially fishery protection might offset the overexploitation of this species. We recommend further monitoring of harvest levels and species catch data.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is found from the Maldives to Vanuatu, extending northwards to Ryukyu Islands, Japan and southwards to New Caledonia.
Countries occurrence:
Australia (Coral Sea Is. Territory); British Indian Ocean Territory (Chagos Archipelago); Brunei Darussalam; Cambodia; Cocos (Keeling) Islands; Disputed Territory (Spratly Is.); India; Indonesia; Japan; Malaysia; Maldives; Micronesia, Federated States of ; Myanmar; New Caledonia; Palau; Papua New Guinea; Philippines; Singapore; Solomon Islands; Sri Lanka; Taiwan, Province of China; Thailand; Timor-Leste; Vanuatu; Viet Nam
FAO Marine Fishing Areas:
Indian Ocean – western; Indian Ocean – eastern; Pacific – western central; Pacific – northwest
Additional data:
Lower depth limit (metres):18
Upper depth limit (metres):1
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:This species is heavily fished in the central Philippines with reported 60% reductions compared with adjacent marine protected area sites. It is abundant in marine reserves in the central Philippines (Stockwell et al. 2009). In Indonesia, it is abundant in Karimunjawa (S. Pardede pers comm. 2009) and moderately common in Raja Ampat, usually on protected inshore reefs with increased turbidity (Allen 2003). It is a relatively small component of the parrotfish fishery in the Solomon Islands (J.H. Choat pers comm. 2009).
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:This species inhabits coral-rich areas of outer channels and seaward coastal reefs including reef flats during high tides. It is known from depths of 1 to at least 18 m. It occurs singly or in small groups.

Use and Trade [top]

Use and Trade: This species is utilized as food, primarily subsistence, but also commercial (local and regional) in Micronesia where possibly exported from the Federal States of Micronesia to Guam.

Threats [top]

Major Threat(s): This species is fished in some parts of its range where destructive fishing practices and habitat destruction are prevalent.

Parrotfishes show varying degrees of habitat preference and utilization of coral reef habitats, with some species spending the majority of their life stages on coral reefs, while others primarily utilize seagrass beds, mangroves, algal beds, and /or rocky reefs. Although the majority of the parrotfishes occur in mixed habitat (primarily inhabiting seagrass beds, mangroves, and rocky reefs) approximately 78% of these mixed habitat species are experiencing greater than 30% loss of coral reef area and habitat quality across their distributions. Of those species that occur exclusively in coral reef habitat, more than 80% are experiencing a greater than 30% of coral reef loss and degradation across their distributions. However, more research is needed to understand the long-term effects of habitat loss and degradation on these species populations.   Widespread coral reef loss and declining habitat conditions are particularly worrying for species that depend on live coral reefs for food and shelter 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. Furthermore, coral reef loss and declining habitat conditions are particularly worrying for some corallivorous excavating parrotfishes that play major roles in reef dynamics and sedimentation (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 several marine protected areas within its range.

Citation: Myers, R., Choat, J.H., Russell, B., Clements, K.D., Rocha, L.A., Lazuardi, M.E., Muljadi, A., Pardede, S. & Rahardjo, P. 2012. Scarus quoyi. The IUCN Red List of Threatened Species 2012: e.T190708A17797524. . Downloaded on 23 July 2018.
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