Overview

Comprehensive Description

Biology

Inhabits turbid inshore reefs among mangroves; tolerates or even prefers low salinities. Fry settles in seagrass beds around river mouths and adults enter and leave rivers with the tide, but also found on the drop-offs of inshore fringing reefs down to 6 m. Schools throughout life; school size for adults around 10 or 15. Feeds on benthic algae. Unlike other siganids, this species is reported to be active at night. Sold fresh in markets (Ref. 9813, 48637).
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Distribution

Eastern Indian Ocean and Western Pacific: Andaman Islands, Thailand, Malaysia, Singapore, Indonesia (including Irian Jaya), Viet Nam, Ryukyus, southern and eastern China, Taiwan, South China Sea, Philippines, and Palau. Replaced by Siganus lineatus to the west, south and east of the region described by the said localities.
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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: 420 mm NG
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Max. size

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

Dusky blue dorsally, silvery below; a bright yellow spot adjacent to last few rays of dorsal fin; head with lines and spots. Preopercular angle 91°-102°; strong scales fully cover the cheeks; midline of thorax scaled, not the pelvic ridges. Anterior nostril with extremely low rim, slightly expanded posteriorly. Spines stout, pungent, venomous.
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Ecology

Habitat

Depth range based on 21 specimens in 1 taxon.
Water temperature and chemistry ranges based on 7 samples.

Environmental ranges
  Depth range (m): 0.305 - 10
  Temperature range (°C): 25.747 - 28.954
  Nitrate (umol/L): 0.099 - 0.158
  Salinity (PPS): 34.131 - 35.560
  Oxygen (ml/l): 4.525 - 4.807
  Phosphate (umol/l): 0.113 - 0.169
  Silicate (umol/l): 1.336 - 1.579

Graphical representation

Depth range (m): 0.305 - 10

Temperature range (°C): 25.747 - 28.954

Nitrate (umol/L): 0.099 - 0.158

Salinity (PPS): 34.131 - 35.560

Oxygen (ml/l): 4.525 - 4.807

Phosphate (umol/l): 0.113 - 0.169

Silicate (umol/l): 1.336 - 1.579
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Depth: 0 - 6m.
Recorded at 6 meters.

Habitat: reef-associated.
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Environment

reef-associated; brackish; marine; depth range 3 - 6 m (Ref. 9813)
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Trophic Strategy

Inhabits coastal reefs and estuaries (Ref. 37816). Also Ref. 58652.
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Diseases and Parasites

Trichodinosis. Parasitic infestations (protozoa, worms, etc.)
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Procamallanus Infection 4. Parasitic infestations (protozoa, worms, etc.)
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Hexangium Infestation. Parasitic infestations (protozoa, worms, etc.)
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Hemiurus Infestation 1. Parasitic infestations (protozoa, worms, etc.)
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Ergasilus Disease 4. Parasitic infestations (protozoa, worms, etc.)
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Caligus Infestation 1. Parasitic infestations (protozoa, worms, etc.)
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Life History and Behavior

Life Cycle

Usually spawn at midnight.
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Siganus guttatus

The following is a representative barcode sequence, the centroid of all available sequences for this species. 

 
There is 1 barcode sequence available from BOLD and GenBank.   Below is the sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.  See the BOLD taxonomy browser for more complete information about this specimen.  Other sequences that do not yet meet barcode criteria may also be available.
 
ABFJ027-06|ISI39|Siganus guttatus| ------------------------------------------CTTTATTTAGTATTTGGTGCTTGAGCCGGAATGGTGGGAACAGCCTTA---AGCCTACTAATTCGAGCAGAACTCAGCCAACCAGGCGCCCTCCTTGGGGAT---GACCAGATTTATAACGTCATTGTTACCGCCCATGCATTCGTAATAATTTTCTTTATAGTAATGCCAATTATGATCGGAGGGTTCGGAAACTGACTAATCCCCCTAATG---ATCGGAGCTCCCGACATGGCATTCCCACGAATGAACAACATGAGCTTCTGACTTCTCCCCCCTTCTTTCCTACTTCTCCTAGCCTCCTCCGGAGTAGAAGCCGGGGCGGGGACCGGGTGAACAGTTTATCCCCCCTTAGCTGGTAACCTAGCACACGCTGGTGCATCAGTCGACCTA---ACCATCTTCTCCCTTCATTTAGCGGGGATTTCCTCAATTCTTGGAGCTATCAACTTCATCACAACCATTATTAACATGAAACCTCCCGCTATTTCCCAATACCAAACCCCATTATTTGTATGGGCCGTCCTAATTACAGCTGTCCTTCTACTTCTTTCTCTACCCGTTTTGGCTGCC---GGGATTACAATGCTTCTCACAGACCGAAATCTGAACACAACTTTSTTTGATCCAGCAGGTGGGGGNGACCCAATTCTATACCAACACCTA-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------  
-- end --

Download FASTA File
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Statistics of barcoding coverage: Siganus guttatus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Species: 31
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; aquaculture: commercial; aquarium: commercial
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Wikipedia

Siganus guttatus

Siganus guttatus is a Rabbitfish from the Eastern Indian Ocean. It occasionally makes its way into the aquarium trade. It grows to a size of 42 cm in length.

References

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