Tandanus tandanus (Mitchell, 1838)

Dewfish

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Siluriformes \| Plotosidae
Synonyms	Plotosus tandanus, ... more
Common names	Tandan catfish, Freshwater catfish, Australsk ferskvandsmalle, ... more

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Picture by Coughran, J.

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Main reference

Allen, G.R. 1989. (Ref. 5259)
Other references | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 90.0 cm TL male/unsexed; (Ref. 5259); common length : 45.0 cm TL male/unsexed; (Ref. 5259); max. published weight: 6,800 g (Ref. 36739); max. reported age: 8 years (Ref. 1107)

Environment

Demersal; potamodromous (Ref. 51243); freshwater; depth range 10 - ? m

Climate / Range

Temperate; 5°C - 25°C (Ref. 2060); 12°S - 43°S

Oceania: endemic to Australia.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

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.


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Venomous (Ref. 4537)

Human uses
Fisheries: commercial; gamefish: yes; aquarium: commercial


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

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Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Low, minimum population doubling time 4.5 - 14 years (tm=5; K=0.10)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Moderate vulnerability (37 of 100)	Not marketed/unknown

Entered by Luna, Susan M.

Modified by Luna, Susan M.

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Page last modified by : elaxamana, 15 July 2009

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