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Nannoperca obscura, Yarra pygmy perch : aquarium
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Yarra 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:
Klunzinger
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; brackish; benthopelagic. Temperate; 10°C - 30°C (Ref.
2060
); 37°S - 38°S
Oceania: coastal drainages of southwestern Victoria from Frankston (Melbourne) to the south Australian border. Has recently sampled in Bool Lagoon drainage system, eastern South Australia and western Victoria.
Length at first maturity / Size / Weight / Age
Maturity: L
m
4.0
  range ? - ? cm
Max length : 7.5 cm TL male/unsexed; (Ref.
5259
); common length : 5.0 cm TL male/unsexed; (Ref.
5259
)
Inhabits streams and small lakes; prefers flowing water with abundant cover in the form of aquatic vegetation (Ref.
44894
). Occurs in creeks and lakes, usually among aquatic weeds. Feeds on insects, insect larvae and planktonic crustaceans (Ref.
5259
,
44894
). Swims in small shoals, sometimes with
N. australis
. Breeding season is in spring (September and October). Slight morphological differences exist between populations from the extreme western and eastern parts of the range that could warrant their placement into separate subspecies (Ref.
44894
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Allen, G.R.
, 1989. Freshwater fishes of Australia. T.F.H. Publications, Inc., Neptune City, New Jersey. (Ref.
5259
)
IUCN Red List Status (Ref.
130435
)
Endangered (EN)
(B2ab(i,ii,iii,iv)); Date assessed:
11 February 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless (Ref.
2906
)
Human uses
Fisheries: of no interest; aquarium: commercial
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Zoological Record
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 ±0.36 se; based on food items.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Assuming Fec<10,000).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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- 20 July 2016
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