Awaous commersoni, Commerson’s freshwater goby

Awaous commersoni (Schneider, 1801)

Commerson’s freshwater goby
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drawing shows typical species in Gobiidae.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Gobiiformes (Gobies) > Gobiidae (Gobies) > Gobionellinae
  More on author: Schneider.

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

; zoetwater; brakwater benthopelagisch; amfidroom (Ref. 57749).   Tropical

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Southwestern Indian Ocean: Réunion, Mauritius, Rodrigues, Comores, Madagascar.

Size / Gewicht / Leeftijd

Maturity: Lm ?  range ? - ? cm
Max length : 25.0 cm SL mannelijk/geslacht niet bekend; (Ref. 57749)

Korte beschrijving Morfologie | Morfometrie

Dorsale stekels (totaal): 7; Dorsale zachte stralen (totaal): 10-11; Anale stekels 1; Anale zachte stralen: 9 - 10. Large head. Fusiform body. Large and terminal mouth. Two dorsal fins. First with 6 spines, second with 1 spine and 10 to 11 branched rays. Adults body and fins usually grey to black with a clearer belly. Juveniles brown with a serie of darker rounded marks along the flanks. First dorsal usually shows a black mark in its posterior part, especially for young specimens. Fading while fish age. 10 to 25cm (Ref. 57749).

Biologie     Verklarende woordenlijst (b.v. epibenthic)

This species occurs in freshwaters and sometimes brackish waters in slow to fast current waters to the base of the first falls. Usually occurs in clear waters with sand, gravel or rock bottom. Feeds on algae, detritus, worms, gastropods and crustaceans. Close biology to A. guamensis. Amphidromous species. Adults migrate to the mouth of the rivers for reproduction. Females spawn on the rocks' surface where the males fecund the eggs. Males protect the eggs until they hatch (incubation lasts 24 to 70hrs). Larvae, translucid, are then carried into estuaries or sea. They come back after they spent 150 to 165 days in seawaters (Ref. 57749). Also Ref. 4343.

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

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

Keith, P., G. Marquet, P. Valade, P. Bosc and E. Vigneux, 2006. Atlas des poissons et des crustacés d'eau douce des Comores, Mascareignes et Seychelles. Muséum national d’Histoire naturelle, Paris. Patrimoines naturels, 65:250p. (Ref. 57749)

Status op de Rode Lijst van het IUCN (Ref. 123251)

  Kwetsbaar, zie IUCN Rode Lijst (VU) (B1ab(iii)+2ab(iii)); Date assessed: 25 June 2018

CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaarlijk voor mensen

  Harmless





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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00794 (0.00365 - 0.01726), b=3.11 (2.93 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  2.2   ±0.1 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref. 120179):  Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Kwetsbaarheid (Ref. 59153):  Moderate vulnerability (40 of 100) .