Australia country information

Common names: Bidyan, Bidyan grunter, Bidyan perch
Occurrence: endemic
Salinity: freshwater
Abundance: | Ref:
Importance: commercial | Ref:
Aquaculture: commercial | Ref: Arthington, A.H. and F. McKenzie, 1997
Regulations: | Ref:
Uses: gamefish: yes;
Comments: Occur in the Murray-Darling system. The extensive spawning migrations of adults pose a fishery management problem. Access to upstream spawning areas may be blocked by high level dams or altered thermal regimes which might cause considerable drop in recruitment (Ref. 2906). Conservation status : vulnerable in Victoria (Ref. 48666). Also Ref. 7300.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/as.html
National Fisheries Authority: http://www.csiro.au/
Occurrences: Occurrences Point map
Main Ref: Allen, G.R., S.H. Midgley and M. Allen, 2002
National Database:

Common names from other countries

银锯眶鯻(银鲈), Australischer Silberbarsch, Sølvaborre, ... more

Classification / Names Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

> Centrarchiformes (Basses) > Terapontidae (Grunters or tigerperches)
Etymology: Bidyanus: A local name, "bidyani" in Australia, New South Wales.

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

; eau douce benthopélagique; potamodrome (Ref. 51243); profondeur 10 - ? m. Subtropical; 10°C - 30°C (Ref. 2060); 29°S - 35°S

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Oceania: known only from the Murray-Darling River system, Australia. Range boundaries: Chinchilla (on the Condamine River), South Queensland, Bonshaw (on the Dumaresq River), northeastern New South Wales, Albury (on the Murray River), southeastern New South Wales, Seven Creek and Goulburn River, South Victoria.

Length at first maturity / Taille / Poids / Âge

Maturity: L_m ?, range 34 - ? cm
Max length : 40.0 cm SL mâle / non sexé; (Ref. 2906); common length : 30.0 cm SL mâle / non sexé; (Ref. 44894); poids max. publié: 1.5 kg (Ref. 5259)

Adults are found in rivers, lakes and reservoirs, preferring fast-flowing waters of rapids and races and usually forming aggregations near the surface. Usually found below rapids and weirs (Ref. 44894). Feed on aquatic insects, mollusks, earthworms and plants. Temp.: 2-37°C. Maturity: F, 3 y and 34 cm SL; M, 23.3 cm SL. Spawning: summer (Nov.-Jan., 23-30°C water temp.), effect upstream migration. Fecundity: 500000 eggs per 1.8kg. Eggs: pelagic, 2.7-2.8 mm diameter. Hatching: 30 hrs at 26-27°C. Larvae: 3.6 mm at hatching. A good angling and food fish which has been increasingly utilized as an aquaculture species in farm dams throughout Australia (Ref. 44894).

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Upstream spawning migration in summer to areas behind the peak of the flood. Spawning commences late in the afternoon from the surface to a depth of about 4 m, where there is a flow over a gravel, rock rubble substrate. Considerable spawning activity happens at the water surface. A single female circles slowly to the surface with her head deep and several males participate in courtship and finally in fertilization (Ref. 2906).

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Paxton, J.R., D.F. Hoese, G.R. Allen and J.E. Hanley, 1989. Pisces. Petromyzontidae to Carangidae. Zoological Catalogue of Australia, Vol. 7. Australian Government Publishing Service, Canberra, 665 p. (Ref. 7300)

Statut dans la liste rouge de l'IUCN (Ref. 130435)

Quasi-menacé (NT) ; Date assessed: 13 February 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

Harmless (Ref. 2906)

Utilisations par l'homme

Pêcheries: commercial; Aquaculture: commercial; pêche sportive: oui

FAO(Aquaculture: production; ; publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01660 (0.00638 - 0.04320), b=2.99 (2.76 - 3.22), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Niveau trophique (Ref. 69278): 3.0 ±0.34 se; based on food items.

Résilience (Ref. 120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (tm=2-3).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (39 of 100).

Catégorie de prix (Ref. 80766): Unknown.

Bidyanus bidyanus (Mitchell, 1838)