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Siganus fuscescens (Houttuyn, 1782)

Mottled spinefoot
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Image of Siganus fuscescens (Mottled spinefoot)
Siganus fuscescens
Picture by Kuiter, R.H.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (Straalvinnigen) > Perciformes (Perch-likes) > Siganidae (Rabbitfishes)
Etymology: Siganus: Latin, siganus = a fish, rabbit fish; by the similarity of the nose (Ref. 45335).

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

; marien; brakwater rifbewoner; oceanodroom (Ref. 51243); diepteverspreiding 1 - 50 m (Ref. 9813).   Tropical; 42°N - 37°S, 90°E - 171°E

Verspreiding Landen | FAO regio's | Ecosystems | Voorkomen | Point map | Introducties | Faunafri

Western Pacific: southern Korea, southern Japan, Ogasawara Islands, Taiwan, southern China, Malaysia, Singapore, Thailand, Andaman Islands, Indonesia, Philippines, Yap, Palau, Pohnpei (Caroline Islands), Solomon Islands, Papua New Guinea, Vanuatu, New Caledonia, and Australia. Often misidentified as Siganus canaliculatus (Ref. 2334).

Length at first maturity / Size / Gewicht / Leeftijd

Maturity: Lm 5.6  range ? - ? cm
Max length : 40.0 cm TL mannelijk/geslacht niet bekend; (Ref. 9813); common length : 25.0 cm TL mannelijk/geslacht niet bekend; (Ref. 9813)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 13; Dorsale zachte stralen (totaal): 10; Anale stekels 7; Anale zachte stralen: 9; Wervels: 13. Body olive green or brown above, silvery below; fish frequently with a dark patch below origin of lateral line. Adults become mottled when frightened. Slender, pungent, venomous spines. Preopercular angle 89°-95°. Lower half to 2/3 of cheeks commonly covered with weak, scattered scales. Midline of thorax between pelvic ridges. Differs from S. argenteus in details of coloration and less deeply forked tail (Ref. 37816).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

Inhabits algal and seagrass flats and shallow lagoon and coastal reefs (Ref. 9710, 11230). Forms schools. Mainly diurnal. Juveniles feed on filamentous algae, adults feed on leafy algae and seagrasses (Ref. 9710). Commercially cultured in Japan. Commonly found in large estuaries (Ref. 9002). Anterolateral glandular groove with venom gland (Ref. 57406).

Life cycle and mating behavior Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

In Belau, ripe individuals form prespawning congregations of 30-60 individuals in shoal areas of inner reef flats; spawning occurs on the 4th or 5th day of the new moon; spawning sites are near reef edge. About 300,000 eggs/female at a single spawning. Individuals that spawn in consecutive yrs. & that 2+ yr. class fish could spawn more than once in a single season. Aug (Ref 1754) in Belau.

Voornaamste referentie Upload your references | Referenties | Coördinator : Woodland, David J. | Medewerkers

Woodland, D.J., 1990. Revision of the fish family Siganidae with descriptions of two new species and comments on distribution and biology. Indo-Pac. Fish. (19):136 p. (Ref. 1419)

Status op de Rode Lijst van het IUCN (Ref. 119314)

  Niet bedreigd (LC) ; Date assessed: 10 March 2015

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Venomous (Ref. 4716)





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Visserij: commercieel; Aquacultuur: commercieel
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Estimates of some properties based on models

Preferred temperature (Ref. 115969): 22.6 - 29, mean 27.9 (based on 760 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00935 - 0.02135), b=2.94 (2.82 - 3.06), in cm Total Length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  2.0   ±0.1 se; Based on diet studies.
Weerstandsvermogen (Ref. 69278):  Hoog, minimale populatieverdubbelingstijd minder dan 15 maanden (Preliminary K or Fecundity.).
Kwetsbaarheid (Ref. 59153):  Low vulnerability (21 of 100) .
Prijsklasse (Ref. 80766):   High.