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The Yarra pygmy perch (''Nannoperca obscura'') is a species of temperate perch that is endemic to southeastern Australia.
Text may have been copied from this source, which is available under
Attribution 3.0 Australia (CC BY 3.0 AU)
licence. The species was first reported in the
Yarra pygmy perch
on Fishes of Australia {{Taxonbar, from=Q2573066 Nannoperca Freshwater fish of Australia Fish described in 1872 Taxonomy articles created by Polbot
Distribution
''Nannoperca obscura'' occurs in the coastal drainages of southeastern Australia, preferring streams and lakes with plentiful vegetation and flowing water. It is found only in the southeastern portion of South Australia south of Adelaide, and extending along southern Victoria some way past Melbourne. Text may have been copied from this source, which is available under Attribution 3.0 Australia (CC BY 3.0 AU)
licence. The species was first reported in the
lower Murray
The Lower Murray languages form a branch of the Pama–Nyungan languages, Pama–Nyungan family. They are:Bowern, Claire. 2011.How Many Languages Were Spoken in Australia?, ''Anggarrgoon: Australian languages on the web'', December 23, 2011corre ...
reaches in South Australia in 2002. However, the 2008 millennium drought caused local extinction
Local extinction, also known as extirpation, refers to a species (or other taxon) of plant or animal that ceases to exist in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinct ...
in the Murray-Darling basin, with only a few individuals kept in private dams.
Description and behaviour
This species can reach a total length of , though most only reach about . Yarra pygmy perch are olive-green above, greenish-brown on the sides, and yellowish-white below, with chevron-shaped markings on rear half of the body. It can also be found in theaquarium
An aquarium (plural: ''aquariums'' or ''aquaria'') is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aq ...
trade.
It feeds on small insects and their larvae, as well as small crustaceans.
Conservation status and measures
The Yarra pygmy perch was classed as anendangered species
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...
on the IUCN Red List in 2019. In Australia, it is classed as vulnerable
Vulnerable may refer to:
General
* Vulnerability
* Vulnerability (computing)
* Vulnerable adult
* Vulnerable species
Music
Albums
* ''Vulnerable'' (Marvin Gaye album), 1997
* ''Vulnerable'' (Tricky album), 2003
* ''Vulnerable'' (The Used album) ...
under the federal EPBC Act and Victoria's '' Flora and Fauna Guarantee Act 1988'', and critically endangered on the Action Plan for South Australian Freshwater Fishes (2009).
In November 2023, around 1,000 genetically-tested fish were release into enclosures near Hindmarsh Island in the lower Murray, to allow for three weeks of acclimatisation before being released into the wild in the river. The conservation project was undertaken by scientist at Adelaide and Flinders universities as well as the Murraylands and Riverland Landscape Board, with assistance from community and school student volunteers.
References
External links
Yarra pygmy perch
on Fishes of Australia {{Taxonbar, from=Q2573066 Nannoperca Freshwater fish of Australia Fish described in 1872 Taxonomy articles created by Polbot