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Nannoperca oxleyana, Oxleyan pygmy perch : aquarium
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Oxleyan pygmy perch
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drawing shows typical species in Percichthyidae.
Teleostei (teleosts) >
Centrarchiformes
(Basses) >
Percichthyidae
(Temperate perches)
Etymology:
Nannoperca:
Latin, nannus = small + Greek, perke = perch (Ref.
45335
)
.
More on author:
Whitley
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; pH range: 6.0 - 6.5; dH range: 5 - 10. Temperate; 16°C - 30°C (Ref.
2060
); 25°S - 29°S
Oceania: endemic in the coastal drainages of northeast and southeast Australia, from Noosa River to Richmond River (Ref.
5259
). Also in dune lakes between the Maroochy and Noosa River systems (Ref.
2906
), Queensland to New South Wales, Australia.
Length at first maturity / Size / Weight / Age
Maturity: L
m
2.9
, range 2 - 2.99 cm
Max length : 7.5 cm SL male/unsexed; (Ref.
7276
); common length : 4.0 cm SL male/unsexed; (Ref.
44894
)
Inhabits ponds, dune lakes and creeks, usually among aquatic weeds (Ref.
6398
). Lives in swamps with prolific sedge growth, gently flowing streams and dune lakes in areas of coastal heathland (wallum). Water is often darkly tannin-stained and acidic (pH 5.4-6.5) with temperature range from 12° to 28°C (Ref.
44894
). Feeds primarily on aquatic insects and their larvae (Ref.
5259
). Also consumes microcrustaceans and algae. Breeding season extends from October to May, when water temperatures rise above 20°C. The breeding habits and biology are similar to other nannopercids, but this species takes only 4-5 months to attain sexual maturity (Ref.
44894
). Aquarium conditions: pH=7.2, H=8, 26°C water temperature, egg layer, plant and rock cover, peaceful community fish (Ref.
6398
).
During the breading season,
N. oxleyana
displays sexual dichromatism, with males showing more intense changes (Ref.
74347
). Males display a darkening of the dorsal, anal and pelvic fins and red colouration of the body and caudal fin (Ref.
74352
). Serial spawner (Ref.
74347
).
Paxton, J.R., D.F. Hoese, G.R. Allen and J.E. Hanley
, 1989. Pisces. Petromyzontidae to Carangidae. Zoological Catalogue of Australia, Vol. 7. Australian Government Publishing Service, Canberra, 665 p. (Ref.
7300
)
IUCN Red List Status (Ref.
130435
)
Endangered (EN)
(B2ab(i,ii,iii,iv)); Date assessed:
08 February 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: of no interest; aquarium: commercial
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00408 - 0.02815), b=3.01 (2.79 - 3.23), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 3.2 ±0.40 se; based on food items.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Fec=225-270).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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- 20 July 2016
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