Galaxias longifundus

Last updated

Galaxias longifundus
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Galaxiiformes
Family: Galaxiidae
Genus: Galaxias
Species:
G. longifundus
Binomial name
Galaxias longifundus
Raadik, 2014

Galaxias longifundus, the West Gippsland galaxias, is a galaxiid of the genus Galaxias , a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia. [2] [3]

Contents

Description

Length commonly 65–80 millimetres (2.6–3.1 in), maximum recorded 97 millimetres (3.8 in). Similar to other members of the species complex. Body long and relatively deep, the back is flattened forward of the pelvic fins. Head medium sized, generally slightly shorter and distinctly wider than deep and wedge-shaped from the side. Snout moderately long and bluntly rounded viewed from the side. [3]

Fins have fleshy bases although the paired fins less so. Fins rounded, anal and dorsal fins roughly the same length with the dorsal usually slightly longer. Pelvic fins positioned approximately mid way along the body, pectoral fins paddle shaped. Tail fin has distinctive flanges extending from across the caudal peduncle to nearly the end of the rays. [3]

G. longifundus is mainly olive-brown across the back, head, snout, and the upper sides becoming light brown on the lower sides and cream on the belly. This is overlaid with a pattern of dark spots and blotches and a faint band of gold speckles along the mid sides. Gill cover is translucent with a small golden patch. Fins are olive-grey and translucent. [3]

Distribution

A distribution map of the West Gippsland galaxias, Galaxias longifundus Galaxias longifundud distribution.jpg
A distribution map of the West Gippsland galaxias, Galaxias longifundus

Recorded only from the east branch of Rintoul Creek in the La Trobe River catchment of Victoria at an elevation of 195–275 metres (640–902 ft). Not recorded downstream where introduced trout have colonised, or in adjacent catchments. Examination of museum specimens captured in the early twentieth century suggest this species may have been more widely distributed within the La Trobe system in the past, including perhaps, as far downstream as Traralgon. [3]

Habitat

The stream where this species has been recorded is small 2 metres (6.6 ft) in average width and shallow 50 centimetres (20 in) in average depth. It consists of a series of pools of an average depth of 90 centimetres (3.0 ft), interspersed with small and shallow 50 millimetres (2.0 in) riffle zones. The stream bottom is mostly boulder, cobble and pebbles with smaller areas of gravel, sand and clay. In-stream cover is provided mainly by rocks and lesser amounts of woody debris as well as overhanging banks and vegetation. [3]

Lifecycle/rproduction

Living its entire life in freshwater, unlike many other galaxias species this fish does not have a marine phase in its lifecycle. Breeding season is unknown, but believed to be during spring. [3]

Conservation

Critically endangered, protected under the Victorian Flora and Fauna Guarantee Act 1988. [3] [4] [2]

Utility to humans

Not an angling target due to small size and conservation status.

Related Research Articles

<span class="mw-page-title-main">Climbing galaxias</span> Species of fish

The climbing galaxias or kōaro is a fish of the family Galaxiidae found in Australia, New Zealand, and nearby islands. The name climbing galaxias is used in Australia, and koaro or kōaro in New Zealand. Further vernacular names include short-finned galaxias, broad-finned galaxias, Cox's mountain galaxias, and Pieman galaxias.

<span class="mw-page-title-main">Mountain galaxias (species complex)</span> Group of fishes

The mountain galaxias is a species complex of freshwater galaxiid fish found all over southeast Australia.

<i>Galaxias olidus</i> Species of fish

Galaxias olidus, the mountain galaxias, is a species of freshwater galaxiid fish widely found in southeastern Australia.

Galaxias fuscus, the barred galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

<span class="mw-page-title-main">Gollum galaxias</span> Species of fish

Gollum galaxias is a galaxiid of the genus Galaxias, found only in southern temperate regions in New Zealand. The species is widespread in rivers throughout the Southland Plains as well as the Von River and Nevis River tributaries of the Clutha River The species is found on Stewart Island/Rakiura, and throughout the Catlins.

<span class="mw-page-title-main">Atlantic threadfin</span> Species of fish

The Atlantic threadfin is a species of ray-finned fish, a threadfin from the family Polynemidae native to subtropical and temperate waters of the western Atlantic Ocean and the Gulf of Mexico.

<i>Galaxias</i> Genus of fishes

Galaxias is a genus of small freshwater fish in the family Galaxiidae, and are frequently referred to as the galaxiids. These highly adaptable fish are typically found at temperate latitudes across the Southern Hemisphere.

<span class="mw-page-title-main">Southern pygmy perch</span> Species of fish

The southern pygmy perch, also known as the Tasmanian pygmy perch, is a species of freshwater ray-finned fish, a temperate perch from the family Percichthyidae which is native to south-eastern Australia and Tasmania.

Galaxias aequipinnis, the East Gippsland galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain galaxias species complex group of freshwater fish, found in Australia.

Galaxias arcanus, the riffle galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

Galaxias brevissimus, the short-tail galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

Galaxias gunaikurnai, the Shaw galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain galaxias species complex group of freshwater fish, found in Australia.

Galaxias lanceolatus, the tapered galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

Galaxias mcdowalli, McDowall's galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

Galaxias mungadhan, the Dargo galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Victoria, Australia.

Galaxias oliros, the obscure galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

Galaxias ornatus, the ornate galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

<i>Galaxias supremus</i> Species of fish

Galaxias supremus, commonly known as the Kosciuszko galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain galaxias species complex group of freshwater fish, found in Australia.

Galaxias tantangara, commonly known as the stocky galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain galaxias species complex group of freshwater fish, found in Australia. Only discovered in 2014, the fish is classed as critically endangered, mainly because of being preyed upon by introduced species of trout.

Galaxias terenasus, the roundsnout galaxias, is a galaxiid of the genus Galaxias, a member of the Mountain Galaxias species complex group of freshwater fish, found in Australia.

References

  1. Raadik, T. (2019). "Galaxias longifundus". IUCN Red List of Threatened Species . 2019: e.T122902339A123382126. doi: 10.2305/IUCN.UK.2019-3.RLTS.T122902339A123382126.en . Retrieved 10 March 2024.
  2. 1 2 Australian Society for Fish Biology threatened species committee. "Conservation Status of Australian Fishes - 2016" . Retrieved 1 August 2019.
  3. 1 2 3 4 5 6 7 8 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" (PDF). Zootaxa. 3898 (1): 1–198. doi:10.11646/zootaxa.3898.1.1. PMID   25543673.
  4. "Flora and Fauna Guarantee Act 1988, Threatened List' November 2019" (PDF). Victorian Department of Environment, Land, Water & Planning. Retrieved 13 December 2019.