Overview

Comprehensive Description

Biology

Adults live mainly in small, clear, flowing streams with gravel or sand bottoms from near sea level to about 1800 m elevation. May be cryptic, living among log debris and boulders, or sometimes found in loose shoals in more open conditions. Also occur in small upland tarns where they may be found shoaling in open water. Tolerant of very cold water, they have been collected from a tarn surrounded by deep snow. Life cycle (maximum life span of about 4 years) is restricted to fresh water. Feed on benthic and drifting invertebrates. Mature individuals breed in spring (sometimes extending to autumn); adults move upstream into shallow riffle areas to lay their demersal, adhesive eggs over rocky bottoms (Ref. 44894).
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Distribution

Oceania: endemic to Australia: Murray-Darling basin in New South Wales, Queensland; South Australia and Victoria; known only from limital area, alpine and subalpine areas of south-eastern Australia from Condamine River, Queensland (26° 51'S) to Fifth Creek, South Australia (138° 42'E), in systems draining to the coast from the Great Dividing Range as well as those draining into the Murray-Darling drainage.
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Australia.
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Physical Description

Size

Max. size

15.0 cm SL (male/unsexed; (Ref. 5259)); max. reported age: 4 years (Ref. 5259)
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Maximum size: 120 mm SL
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Ecology

Habitat

Environment

benthopelagic; freshwater
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Galaxias olidus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Threats

Critically Endangered (CR) (A1c+2c, B1+2b)
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Wikipedia

Mountain galaxias

The mountain galaxias (Galaxias olidus) is a species of freshwater galaxiid fish found all over southeast Australia.[1][2]

Range[edit]

Galaxias olidus, occupies a vast geographical range. They are found from southern Queensland to the Adelaide Hills in South Australia, and while occurring widely in the Murray-Darling river system, are also found in eastern and southern coastal systems, as well. It is not clear how much of their coastal distribution is due to natural river capture events (although it is certain much of it is) and how much of it may be due to migration, for many mountain galaxias species have the ability to "climb" natural migration barriers with modified pelvic fin structures. [3]

Within the Murray-Darling system, the mountain galaxias continues the trend of specialisation into upland and lowland habitats, with species found in upland habitats, and the flathead galaxias found in lowland habitats. Though Galaxias olidus, stray down to the upland/lowland transition zone in some rivers.

References[edit]

  1. ^ Froese, Rainer and Pauly, Daniel, eds. (2014). "Galaxias olidus" in FishBase. 11 2014 version.
  2. ^ Raadik, T.A. (2014). "Fifteen from one: a revision of the Galaxias olidus Günther, 1866 complex (Teleostei, Galaxiidae) in south-eastern Australia recognises three previously described taxa and describes 12 new species.". Zootaxa, 3898 (1): 1–198. 
  3. ^ McDowall, R.M. (2006): Crying wolf, crying foul, or crying shame: alien salmonids and a biodiversity crisis in the southern cool-temperate galaxioid fishes? Reviews in Fish Biology and Fisheries, 16: 233–422.
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