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Overview

Comprehensive Description

Biology

Occurs in small schools of up to 10 individuals or so, in shallow coastal waters, brackish lagoons and rocky or coral reefs. Feeds on algae attached to the substrate and on floating algal fragments. Found resting in midwater at depths of 2 to 6 m when not feeding. Marketed fresh (Ref. 9813, 48637).
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Distribution

Indo-Pacific: Persian Gulf, Gulf of Oman, Pakistan, India, Sri Lanka, Burma, Andaman Islands, Thailand, Viet Nam, southern China, Malaysia, Indonesia, Philippines, Australia, New Guinea, Vanuatu and New Caledonia. Records for the Ryukyu and Ogasawara Islands could be based on strays (Ref. 9813).
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Indo-West Pacific.
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Physical Description

Morphology

Dorsal spines (total): 13; Dorsal soft rays (total): 10; Analspines: 7; Analsoft rays: 9; Vertebrae: 13
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Size

Maximum size: 530 mm NG
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Max. size

53.0 cm TL (male/unsexed; (Ref. 9710))
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Diagnostic Description

Body bronze above, white on belly and thorax; iris light brown; pectoral fins hyaline, pelvic fins white. Slender and pungent dorsal spines; anal spines stout. Preopercular angle 78°-92°. Strong scales cover cheeks. Midline of thorax scaled but not pelvic ridges. Broad-based triangular flap of anterior nostril reaching half way to posterior nostril in juveniles, reducing to a small crescent with age.
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Ecology

Habitat

Environment

reef-associated; oceanodromous (Ref. 51243); brackish; marine, usually 2 - 20 m (Ref. 27115)
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Depth range based on 14 specimens in 1 taxon.
Water temperature and chemistry ranges based on 4 samples.

Environmental ranges
  Depth range (m): 0.9 - 40
  Temperature range (°C): 26.358 - 28.885
  Nitrate (umol/L): 0.075 - 0.520
  Salinity (PPS): 32.200 - 35.180
  Oxygen (ml/l): 4.427 - 4.639
  Phosphate (umol/l): 0.131 - 0.339
  Silicate (umol/l): 0.567 - 4.465

Graphical representation

Depth range (m): 0.9 - 40

Temperature range (°C): 26.358 - 28.885

Nitrate (umol/L): 0.075 - 0.520

Salinity (PPS): 32.200 - 35.180

Oxygen (ml/l): 4.427 - 4.639

Phosphate (umol/l): 0.131 - 0.339

Silicate (umol/l): 0.567 - 4.465
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Migration

Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.
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Trophic Strategy

Also Ref. 58534.
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Diseases and Parasites

Procerovum Infestation 1. Parasitic infestations (protozoa, worms, etc.)
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Hexangium Infestation. Parasitic infestations (protozoa, worms, etc.)
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Heterophyopsis Infestation. Parasitic infestations (protozoa, worms, etc.)
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Haplorchis Infestation 2. Parasitic infestations (protozoa, worms, etc.)
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Haplorchis Infestation 1. Parasitic infestations (protozoa, worms, etc.)
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Siganus javus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 6
Species With Barcodes: 1
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Conservation

Threats

Not Evaluated
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial; aquarium: commercial
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Wikipedia

Siganus javus

The streaked spinefoot (Siganus javus) is a species of rabbitfish. Like all rabbitfishes, it has venomous spines on the dorsal, anal, and pelvic fins. It is a herbivore, feeding mostly on algae in shallow, coastal waters, brackish lagoons, and rocky or coral reefs. It is found throughout most of the Indo-Pacific region, in groups usually consisting of around 10. It has an adult size ranging between 25 and (large males) 55 cm. It inhabits shallow waters between 2 and 20 m deep.

References[edit]

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