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Siluriformes (Catfishes) >
Plotosidae (Eeltail catfishes)
Etymology: Tandanus: A local name, tandan, in Australia.
Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water demersaal; potamodroom (Ref. 51243); diepte 10 - ? m. Temperate; 5°C - 25°C (Ref. 2060); 12°S - 43°S
Oceania: endemic to Australia.
Lengte bij maturiteit / Grootte / Gewicht / Leeftijd
Maturity: Lm 45.0 range ? - ? cm
Max length : 90.0 cm TL mannelijk / geslacht onbekend; (Ref. 5259); common length : 45.0 cm TL mannelijk / geslacht onbekend; (Ref. 5259); max. gepubliceerd gewicht: 6.8 kg (Ref. 36739); max. gerapporteerde leeftijd: 8 Jaren (Ref. 1107)
Korte beschrijving
Morfologie | Morfometrie
Head large; thick and fleshy lips; nostrils tubular. First dorsal fin high, with a strong serrated spine and 6 rays. Skin tough and smooth. Body coloration in adults vary from olive-green to brown, black or purplish dorsally and white ventrally. Urogenital papilla triangular in females; longer and cylindrical in males.
Adults inhabit slow moving streams, lakes and ponds with fringing vegetation. They swim close to sand or gravel bottoms. More abundant in lakes than in flowing water (Ref. 44894). Usually solitary but juveniles sometimes form loose aggregations. Mainly bottom-feeders (Ref. 44894). Feed on insect larvae, prawns, crayfish, mollusks, and small fishes. Breeding occurs between spring and mid-summer when water temperatures rise to between 20° and 24°C (Ref. 44894). Utilized for human consumption.
Water temperature (20-24 °C) considered the primary spawning stimulus. There is direct pairing during spawning. Male builds nest (0.6-2.0 m in diameter) and cares for eggs in the nest up to 2 weeks. The nest is made of gravel and rocks with a central sandy depression in which the female deposits up to 20,000 eggs depending on her size (Ref. 5259). Eggs scattered into the rubble are tended and guarded by the male after the female departs (Ref. 205). Hatching occurs in 7-10 days at 18°C (Ref. 240).
Allen, G.R., 1989. Freshwater fishes of Australia. T.F.H. Publications, Inc., Neptune City, New Jersey. (Ref. 5259)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gebruik door de mens
Visserij: commercieel; sportvis: ja; Aquarium: Commercieel
Meer informatie
ReferentiesAquacultuurAquacultuurprofielKweeklijnenGeneticaElectrophoresesErfelijkheidZiektesVerwerkingNutrientsMassaconversie
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Estimates based on models
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00646 (0.00279 - 0.01495), b=3.07 (2.87 - 3.27), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
Trofisch niveau (Ref.
69278): 3.3 ±0.48 se; based on food items.
Generation time: 11.0 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Weerstandsvermogen (Ref.
120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (tm=5; K=0.10).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (37 of 100).
