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Astronotus ocellatus  (Agassiz, 1831)

Oscar
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Native range | All suitable habitat
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Astronotus ocellatus   AquaMaps   Data sources: GBIF OBIS
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Image of Astronotus ocellatus (Oscar)
Astronotus ocellatus
Picture by Schüür, G.


Brazil country information

Common names: Acará-açu, Acará-grande, Acaraú-açu
Occurrence: native
Salinity: freshwater
Abundance: scarce (very unlikely) | Ref: Silvano, R.A.M. and A. Begossi, 2001
Importance: commercial | Ref: Boujard, T., M. Pascal, F.J. Meunier and P.-Y. Le Bail, 1997
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Known from the Amazon River basin (Ref. 36377). Recorded in Piracicaba river (Ref. 50076). Considered economically important by the Brazilians who have acclimated the originally Amazonian stocks to the conditions of the province in the northeast (Ref. 27188).
National Checklist:
Country Information: httpss://www.cia.gov/library/publications/resources/the-world-factbook/geos/br.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Silvano, R.A.M. and A. Begossi, 2001
National Database:

Classification / Names

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Cichlidae (Cichlids) > Astronotinae
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL

Common names from other countries

Main reference

Size / Weight / Age

Max length : 45.7 cm TL male/unsexed; (Ref. 40637); common length : 24.0 cm TL male/unsexed; (Ref. 12193); max. published weight: 1.6 kg (Ref. 40637)

Length at first maturity
Lm 12.0  range ? - ? cm

Environment

Freshwater; benthopelagic; pH range: 6.0 - 8.0; dH range: 5 - 19

Climate / Range

Tropical; 22°C - 25°C (Ref. 1672), preferred ?; 4°N - 15°S, 78°W - 47°W

Distribution

South America: Amazon River basin in Peru, Colombia and Brazil; French Guiana. Reported from Argentina (Ref. 9086).
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Dorsal spines (total): 12 - 14; Dorsal soft rays (total): 19-21; Anal spines: 3; Anal soft rays: 15 - 17. Large mouth with thick lips; 7 preopercular pores; first gill arch without lobe; gill rakers short and thick with many denticles; dorsal and anal fins bases densely scaled; many branched rays; body color dark with bright orange opercle margin and ventral parts of the lateral sides of the body; often a black rounded blotch with orange margin at caudal fin base (Ref. 35237).

Biology     Glossary (e.g. epibenthic)

Preferably inhabits quiet shallow waters in mud-bottomed and sand-bottomed canals and ponds (Ref. 5723). Feeds on small fish, crayfish, worms and insect larvae. Quite popular with aquarists but not for aquaculturists because of its slow growth (Ref. 35237). Maximum length 40 cm TL (Ref. 5723). A highly esteemed food fish in South America (Ref. 44091).

IUCN Red List Status (Ref. 115185)

Threat to humans

  Harmless



Human uses

Fisheries: commercial; gamefish: yes; aquarium: highly commercial

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

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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)
2.8   ±0.32 se; Based on food items.

Resilience (Ref. 69278)
High, minimum population doubling time less than 15 months (Assuming tm<=1; Fec=300-2000)

Vulnerability (Ref. 59153)
Moderate vulnerability (36 of 100)
Price category (Ref. 80766)
Unknown