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Centrarchiformes (Basses) >
Terapontidae (Grunters or tigerperches)
Etymology: Bidyanus: A local name, "bidyani" in Australia, New South Wales.
Environnement : milieu / zone climatique / profondeur / gamme de distribution
Écologie
; eau douce benthopélagique; potamodrome (Ref. 51243); profondeur 10 - ? m. Subtropical; 10°C - 30°C (Ref. 2060); 29°S - 35°S
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.
Longueur à la première maturité / Taille / Poids / Âge
Maturité: Lm ?, 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).
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).
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: Version 2025-2 (Global))
Utilisations par l'homme
Pêcheries: commercial; Aquaculture: commercial; pêche sportive: oui
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Estimations basées sur des modèles
Indice de diversité phylogénétique (Réf.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01660 (0.00632 - 0.04360), 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 (Réf.
69278): 3.0 ±0.34 se; based on food items.
Résilience (Réf.
120179): Milieu, temps minimum de doublement de population : 1,4 à 4,4 années (tm=2-3).
Vulnérabilité de la pêche (Ref.
59153): Moderate vulnerability (39 of 100).
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