Nannatherina balstoni Regan, 1906

Balston's pygmy perch

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Actinopterygii \| Perciformes \| Percichthyidae
Synonyms	... more
Common names	巴氏南脂鲈, Balstons Zwergbarsch, Balston's perchlet, ... more

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Main reference

Paxton, J.R., D.F. Hoese, G.R. Allen and J.E. Hanley. 1989. (Ref. 7300)
Other references | Biblio | Coordinator : Arratia, Gloria | Collaborators

Size / Weight / Age

Max length : 9.0 cm SL male/unsexed; (Ref. 44894); 9 cm TL (female); common length : 6.0 cm SL male/unsexed; (Ref. 44894); max. reported age: 3 years (Ref. 41789)

Environment

Benthopelagic; freshwater; pH range: 6.0 - 6.5; dH range: 5 - 10

Climate / Range

Temperate; 15°C - 30°C (Ref. 2060); 31°S - 34°S

Oceania: coastal drainages of southwest Australia between Two People Bay (near Albany) and the Blackwood River. Also reported from the Goodga River to Gin Gin Brook, western Australia (Ref. 7300).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Is the rarest of all the endemic freshwater fishes of southwestern Australia. Inhabits coastal streams, lakes, ponds and swamps, where the water is dark and acidic (pH as low as 3.0) and has a large seasonal fluctuation in temperature (11-30°C) (Ref. 27892, 44894). Favors shallow water and is commonly found in association with tall sedge thickets (Ref. 44894). Larva feeds mainly on cladocerans, copepods and dipteran larvae, while juveniles and adults ingest mostly terrestrial fauna (Ref. 6398, 44894). Breeds in the middle of winter in response to flooding. Female lays between 500-1600 eggs each. The majority of adult perishes shortly after spawning at the end of their first year (Ref. 44894). Both male and female attain sexual maturity at the end of their first year of life when they have attained an average TL of 6.0 and 6.3 cm respectively (Ref. 27892). Co-occurs with Edelia vittata over part of its range, but is generally more scarce (Ref. 5259, 44894). Aquarium conditions: pH=7.2, H=8, 24°C water temperature, rock and plant cover, carnivore, peaceful community fish, egg layer (Ref. 6398).


IUCN Red List Status (Ref. 57073)	Threat to humans
Data deficient (DD)	Harmless

Human uses
Fisheries: of no interest; aquarium: commercial


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

Tools
Biogeographic modelling \| E-book \| Field guide \| Length-frequency wizard \| Life-history tool \| Point map

Special reports
Check for Aquarium maintenance \| Check for Species Fact Sheets \| Check for Aquaculture Fact Sheets

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Summary page \| Point data \| Common names \| Photos

Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Medium, minimum population doubling time 1.4 - 4.4 years (tm=1; K=1.31-1.69; Tmax=3; mean Fec=1243;)


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low vulnerability (11 of 100)	Not marketed/unknown

Entered by Palomares, Maria Lourdes D.

Modified by Ortañez, Auda Kareen

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Page last modified by : elaxamana, 15 July 2009

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