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Pedder galaxias - Wikipedia

From Wikipedia, the free encyclopedia

Pedder galaxias

Conservation status
Endangered (IUCN 3.1)^[1]
Extinct in the Wild (EPBC Act)^[2]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Galaxiiformes
Family:	Galaxiidae
Genus:	Galaxias
Species:	G. pedderensis
Binomial name
*Galaxias pedderensis* Frankenberg, 1968

The Pedder galaxias (Galaxias pedderensis) is an Australian freshwater fish. It is considered to be extinct in the wild since 2005 by the EPBC Act, and was originally found only in Lake Pedder in Tasmania.

Range

Originally recorded only in Lake Pedder and inflowing streams, after the construction of the Huon–Serpentine dam in 1972 (the "new" Lake Pedder), its range expanded initially into Lake Gordon and Wedge River. However, by 1980 it had become very rare and no new specimens have been captured in the wild since 1996. Introduced trout are implicated as a major factor in the decline of this species. The species survives in two translocated populations outside its original range, one at Lake Oberon in the Western Arthurs mountain range and one at a modified water supply dam near Strathgordon.^[2]

Description

A small greenish-brown fish, off-white to silvery belly, a profuse irregular and highly variable pattern of alternating off-white and brownish contrasting bands extending into the base of the fins and breaking up into fine spots on the lower part of the sides. Length to 160 mm.

Habitat

Before the construction of the new lake, this species preferred Lake Pedder itself which was quite shallow surrounded by white sandy beaches and small rooted aquatic vegetation as well as in swamps and low velocity waters with abundant instream organic debris and overhanging terrestrial vegetation.^[3]

Diet consists of small invertebrates, particularly arthropods and aquatic insect larvae, crustaceans and terrestrial insects especially beetles, flies, cicadas etc.^[3]

Conservation status

Extinct in the wild status for the EPBC Act since 2005.^[2]
Listed as endangered by the IUCN since 2019.^[1]

Reproduction

Females are larger than males. Male genital papilla narrow, whereas female are broad and rounded, most noticeable during breeding season. 150 to 1,200 eggs averaging 1.9 mm to 2.3 mm in diameter when water hardened. Spawning reported to occur in spring (October) at water temperatures of 6.7 to 7.5 °C.

References

^ ^a ^b Freeman, R. (2019). "Galaxias pedderensis". IUCN Red List of Threatened Species. 2019: e.T8808A129041339. doi:10.2305/IUCN.UK.2019-3.RLTS.T8808A129041339.en. Retrieved 19 November 2021.
^ ^a ^b ^c "Australian Department of the Environment and Heritage (2006). "Galaxias pedderensis" in Species Profile and Threats Database, Department of the Environment and Heritage, Canberra". Deh.gov.au. 13 March 2012. Retrieved 6 July 2012.
^ ^a ^b Gomon, Martin F.; Bray, Dianne J. "Pedder Galaxias, Galaxias pedderensis Frankenberg 1968 More Info". Fishes of Australia. OzFishNet & Museums Victoria. Retrieved 3 October 2020.

External links

Wikimedia Commons has media related to Galaxias pedderensis.

South West region of Tasmania, Australia

Settlements

Governance

Mountains

Frankland Range	Citadel, The Cleft Peak Cupola, The Frankland Greycap Lion, The Lloyd Jones Murpheys Bluff Redtop Right Angle Scotts Secheron Terminal
Arthur Range	Federation
King William Range	Mount King William
Prince of Wales Range (Tasmania)	Diamond Peak

Protected areas,
parks and reserves

Franklin-Gordon Wild Rivers National Park
Melaleuca to Birchs Inlet Important Bird Area
Port Davey/Bathurst Harbour Marine Nature Reserve
Port Davey Islands Important Bird Area
Southwest National Park
South West Wilderness
Tasman Fracture Commonwealth Marine Reserve
Tasmanian Wilderness World Heritage Area

Rivers

Lakes

Edgar

Lake Pedder controversy

Dams
Franklin controversy

Commonwealth v Tasmania

The Wilderness Society

Harbours, bays, inlets and estuaries

Coastal features

Power stations

Gordon

Transport

Railways	Great Western Railway (proposed never constructed)

Landmarks

Natural	Gordon Splits
Man-made	Maatsuyker Island Lighthouse Port Davey Track South Coast Track

People of note

Islands

Breaksea	Fitzroy Kathleen Main Mavourneen Munday North
Maatsuyker (group)	Chicken De Witt Flat Top Flat Witch Hen Ile du Golfe Louisa Maatsuyker (island) Needles Round Top Walker Western Rocks
Swainson (group)	Big Caroline Hay Lourah Shanks Swainson
Mutton Bird (group)	East Pyramids Mutton Bird Island Mutton Bird Islet (southeast) Mutton Bird Islet (southwest) Sugarloaf Sugarmouse Wendar Wild Wind
Pedra Branca	Mewstone
Trumpeter	Coffee Pot, The Hobbs Trumpeter West Pyramid

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Flora, fauna, and fishlife

Bioregions

Indigenous heritage

Taxon identifiers
Galaxias pedderensis	Wikidata: Q1097860 Wikispecies: Galaxias pedderensis AFD: Galaxias_pedderensis BOLD: 717084 CoL: 6K83V EoL: 212466 FishBase: 6204 GBIF: 5214314 iNaturalist: 101159 IRMNG: 10854643 ITIS: 623461 IUCN: 8808 NCBI: 1120760 Open Tree of Life: 200627 SPRAT: 26169 WoRMS: 991215

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