Galaxias johnstoni Scott, 1936

Clarence galaxias

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

Classification	Actinopterygii \| Osmeriformes \| Galaxiidae \| Galaxiinae
Synonyms	... more
Common names	乔氏南乳鱼, 喬氏南乳魚, ... more

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Main reference

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

Size / Weight / Age

Max length : 14.0 cm SL male/unsexed; (Ref. 44894); common length : 7.5 cm SL male/unsexed; (Ref. 5259); max. published weight: 20.0 g (Ref. 30189)

Environment

Demersal; catadromous (Ref. 51243); freshwater

Climate / Range

Temperate; 42°S - 43°S

Oceania: known only in Clarence Lagoon and tributaries and the upper reaches of the Clarence River, which is part of the Derwent River system of Tasmania, Australia.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 0; Dorsal soft rays (total): 10 - 12; Anal spines: 0; Anal soft rays: 11 - 13; Vertebrae: 53 - 54. Scales completely absent (Ref. 30189). Dark brown dorsal surface, irregular dark brown bars and bands extending down sides, ventral surface yellow-cream in color (Ref. 30189).

Found in shelter of rocks and boulders in lacustrine habitats, also found in swamps and streams draining in and out of lakes (Ref. 44894). Adults occur in the rocky margin of Clarence Lagoon, its outlet stream and several tributaries that flow into the lake. Adults feed on benthic crustaceans while juveniles feed partly on planktonic crustaceans, and insects and their larvae (Ref. 30189, 44894). Very secretive species, darts for cover under boulders if disturbed. The entire life cycle (may live for up to four years) takes place in fresh water. Adults move into inlet streams to spawn in spring. The demersal eggs take about 2 months to hatch. Fry reside in open surface waters of the lake (Ref. 44894).


IUCN Red List Status (Ref. 57073)	Threat to humans
Critically Endangered (CR) (A1c, B1+2a)	Harmless

Human uses


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

Tools
Biogeographic modelling \| E-book \| Field guide \| Length-frequency wizard \| Life-history tool \| Point map

Special reports
Check for Aquarium maintenance \| Check for Species Fact Sheets \| Check for Aquaculture Fact Sheets

Download XML
Summary page \| Point data \| Common names \| Photos

Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Medium, minimum population doubling time 1.4 - 4.4 years (tm=2; Fec=300)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low to moderate vulnerability (28 of 100)	Not marketed/unknown

Entered by Cruz, Tess

Modified by Ortañez, Auda Kareen

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Page last modified by : elaxamana, 15 July 2009

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