Australia country information

Common names: Yarra pygmy perch
Occurrence: endemic
Salinity: freshwater
Abundance: | Ref:
Importance: of no interest | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Recently sampled from Bool Lagoon by R.H. Kuiter which represents a significant westward range extension. This population differs from specimens in eastern range. Adversely affected by Oncorhynchus mykiss, Salmo trutta, Perca fluviatilis, Cyprinus carpio and Gambusia holbrooki (Ref. 48787). Also Ref. 7300. Status of threat: vulnerable because of widespread habitat degradation within its restricted range (Ref. 44894).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/as.html
National Fisheries Authority: http://www.csiro.au/
Occurrences: Occurrences Point map
Main Ref: Allen, G.R., 1989
National Database:

Common names from other countries

Yarra Zwergbarsch, 暗色断线矮鲈(凹顶鲈), 暗矮鲈, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

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

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

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

Main reference Upload your references | References | Coordinator : Arratia, Gloria | Collaborators

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 (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless (Ref. 2906)

Human uses

Fisheries: of no interest; aquarium: commercial

FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 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).

Nannoperca obscura (Klunzinger, 1872)