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Bidyanus bidyanus  (Mitchell, 1838)

Silver perch
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Image of Bidyanus bidyanus (Silver perch)
Bidyanus bidyanus
Picture by Yau, B.


Philippines country information

Common names: [No common name]
Occurrence: not established
Salinity: freshwater
Abundance: | Ref:
Importance: | Ref:
Aquaculture: likely future use | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Roger Pullin, pers. comm.
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/rp.html
National Fisheries Authority:
Occurrences: Occurrences Point map
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Terapontidae (Grunters or tigerperches)
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Main reference

Size / Weight / Age

Max length : 40.0 cm SL male/unsexed; (Ref. 2906); common length : 30.0 cm SL male/unsexed; (Ref. 44894); max. published weight: 1.5 kg (Ref. 5259)

Length at first maturity
Lm ?, range 34 - ? cm

Environment

Freshwater; benthopelagic; potamodromous (Ref. 51243); depth range 10 - ? m

Climate / Range

Subtropical; 10°C - 30°C (Ref. 2060); 29°S - 35°S

Distribution

Oceania: known only from the Murray-Darling River system, Australia. Range boundaries: Chinchilla (on the Condamine River), South Queensland, Bonshaw (on the Dumaresq River), northeastern New South Wales, Albury (on the Murray River), southeastern New South Wales, Seven Creek and Goulburn River, South Victoria.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Biology     Glossary (e.g. epibenthic)

Adults are found in rivers, lakes and reservoirs, preferring fast-flowing waters of rapids and races and usually forming aggregations near the surface. Usually found below rapids and weirs (Ref. 44894). Feed on aquatic insects, mollusks, earthworms and plants. Temp.: 2-37°C. Maturity: F, 3 y and 34 cm SL; M, 23.3 cm SL. Spawning: summer (Nov.-Jan., 23-30°C water temp.), effect upstream migration. Fecundity: 500000 eggs per 1.8kg. Eggs: pelagic, 2.7-2.8 mm diameter. Hatching: 30 hrs at 26-27°C. Larvae: 3.6 mm at hatching. A good angling and food fish which has been increasingly utilized as an aquaculture species in farm dams throughout Australia (Ref. 44894).

IUCN Red List Status (Ref. 115185)

  Vulnerable (VU) (A1cd)

Threat to humans

  Harmless (Ref. 2906)



Human uses

Fisheries: commercial; aquaculture: commercial; gamefish: yes

More information

Age/Size
Growth
Length-weight
Length-length
Length-frequencies
Morphometrics
Morphology
Larvae
Larval dynamics
Recruitment
Abundance
References
Aquaculture
Aquaculture profile
Strains
Genetics
Allele frequencies
Heritability
Diseases
Processing
Mass conversion
Collaborators
Pictures
Stamps, Coins
Sounds
Ciguatera
Speed
Swim. type
Gill area
Otoliths
Brains
Vision

Tools

Special reports

Download XML

Internet sources

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805)
PD50 = 0.7500 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Trophic Level (Ref. 69278)
3.0   ±0.34 se; Based on food items.

Resilience (Ref. 69278)
Medium, minimum population doubling time 1.4 - 4.4 years (tm=2-3)

Vulnerability (Ref. 59153)
Low to moderate vulnerability (33 of 100)
Price category (Ref. 80766)
Unknown