Chagos Islands country information

Common names: [No common name]
Occurrence: questionable
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: never/rarely | Ref:
Regulations: no regulations | Ref:
Uses: no uses
Comments: The distribution of this species in this archipelago does not have credible records to support it (Ref. 1522) but during the Percy Laden Expedition, dugongs were spotted in the Chagos Archipelago (Ref. 84351). C: Ref. 1522; O: Ref. 84351.
National Checklist:
Country Information: ttp://en.wikipedia.org/wiki/Chagos_Island
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Rice, D.W., 1998
National Database:

Common names from other countries

Avolia, ... more

Classification / Names / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS

Mammalia > Sirenia (Dugongs and manatees) > Dugongidae (dugongs)

Environment: milieu / climate zone / depth range / distribution range Ecology

Benthopelagic; depth range 0 - 200 m (Ref. 81173), usually 1 - 40 m. Tropical; 30°N - 37°S, 32°E - 178°W

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-Pacific: Dugong dugon hemprichii: Red Sea, Aqaba, Suez Canal; Dugong dugon dugon: Gulf of Aden, Mozambique, Persian Gulf, Pakistan, India, Myanmar, Malay Peninsula, Gulf of Thailand, Vietnam, Gulf of Tonkin, Comoros, Madagascar, Mauritius, Rodriguez, Sri Lanka, Andaman Islands, Indonesia, Ryukyu, Taiwan, Philippines, Guam, Palau, Micronesia, Caroline Is, Papua New Guinea, Solomon, New Caledonia, Australia, Fiji (Ref. 1522).

Length at first maturity / Size / Weight / Age

Maturity: L_m ? range ? - ? cm Max length : 406 cm TL male/unsexed; (Ref. 91927); max. published weight: 400.0 kg (Ref. 1394); max. reported age: 20 years (Ref. 91927)

Maximum diving depth of 20.5 m recorded from Australia (Ref. 81173). Found in inshore waters, in bays and channels (Ref. 1394). Favors areas with warm shallow water, inshore and reefal seagrass beds (Ref. 936), particularly on fine sand (Ref. 86921). Occurs in small groups of up to 6 individuals; though, an exception of a herd of to 600 individuals was once recorded between Bahrain and Qatar (Ref. 801). Population estimates in the Persian/Arabian Gulf range from 5800 to 7300 individuals. Has a larger range than previously known, where their present range may be about 74% of the historical range (Ref. 114880). Feeds on a variety of seagrasses (Ref. 936). Almost entirely dependent on seagrass for food (Ref. 114880). Preyed upon by tiger sharks (Ref. 49538). Faces threats in the Persian/Arabian Gulf such as dredging, trawling and land reclamation, all damaging their critical seagrass habitats (Ref. 114880).

Main reference References | Coordinator | Collaborators

Tan, J.M.L. 1995. (Ref. 936)

IUCN Red List Status (Ref. 130435)

Vulnerable (VU) (A2bcd+4bcd); Date assessed: 12 July 2015

CITES status (Ref. 108899)

Appendix I: International trade banned

CMS (Ref. 116361)

Appendix II: Migratory species conserved through agreements

Human uses

Fisheries: of no interest
FAO - Fisheries: species profile | FishSource | Sea Around Us

Tools

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More information

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Common names
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Predators
Reproduction
Maturity
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Age/Size
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References
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Estimates based on models

Preferred temperature (Ref. 115969): 24 - 29, mean 27.8 (based on 1686 cells).

Resilience (Ref. 69278) High, minimum population doubling time less than 15 months (K=1.26-1.62; tm=12.3; tmax=20).

Vulnerability (Ref. 71543): Very high vulnerability (90 of 100).

Price category (Ref. 80766): Unknown.

Dugong dugon (Müller, 1776)