Overview

Comprehensive Description

Description

  Common names: weakfish (English), corvina (Espanol)
 
Cynoscion praedatorius (Jordan & Gilbert, 1889)

Corvina bocona

Elongate, fusiform, compressed, oval cross-section; head deep, long (~ 27% of SL); ridge down front of snout; mouth strongly oblique, lower jaw very prominent; front of top jaws with 1 pair of large pointed canines; no barbels or pores on chin; 9 lower gill rakers; margin of preopercle smooth; dorsal with long base, a small gap separating the two parts, IX-X + I, 18-21; anal II, 9; pectoral fins slightly longer than pelvics; rear margin of tail with blunt point; all scales smooth, small, 60-65 scales on lateral line, these larger than adjacent rows and with small accessory scales; soft dorsal and anal fins entirely scaly.


Blue-grey above, silvery with orange-yellow tint below; spiny dorsal clear; soft dorsal and anal grey, with orange tint; tail dark grey; pelvics pale grey; pectorals orange grey upper 1/3, grey with orange tint below; iris with orange tint;  inside mouth orange-yellow; tip of lower jaw dark.

Size: 120 cm.

Habitat: coastal, marine.

Depth: 5-50 m.

Costa Rica to Ecuador   
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Biology

Inhabits coastal waters (Ref. 9118).
  • Chao, L.N. 1995 Sciaenidae. Corvinas, barbiches, bombaches, corvinatas, corvinetas, corvinillas, lambes, pescadillas, roncachos, verrugatos. p. 1427-1518. In W. Fischer, F. Krupp, W. Schneider, C. Sommer, K.E. Carpenter and V. Niem (eds.) Guia FAO para identificacion de especies para los fines de la pesca. Pacifico Centro-oriental. 3 volumes. 1813 p. (Ref. 9118)   http://www.fishbase.org/references/FBRefSummary.php?id=9118&speccode=13985 External link.
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Distribution

Range Description

This species is endemic to the Eastern Tropical Pacific, and is found from Costa Rica to southern Colombia.
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Zoogeography

See Map (including site records) of Distribution in the Tropical Eastern Pacific 
 
Global Endemism: All species, East Pacific endemic, Tropical Eastern Pacific (TEP) endemic

Regional Endemism: All species, TEP endemic, Continental TEP endemic, Panamic province endemic, Continent, Continent only

Residency: Resident

Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
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Eastern Central Pacific: Costa Rica and Panama.
  • Chao, L.N. 1995 Sciaenidae. Corvinas, barbiches, bombaches, corvinatas, corvinetas, corvinillas, lambes, pescadillas, roncachos, verrugatos. p. 1427-1518. In W. Fischer, F. Krupp, W. Schneider, C. Sommer, K.E. Carpenter and V. Niem (eds.) Guia FAO para identificacion de especies para los fines de la pesca. Pacifico Centro-oriental. 3 volumes. 1813 p. (Ref. 9118)   http://www.fishbase.org/references/FBRefSummary.php?id=9118&speccode=13985 External link.
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Eastern Pacific.
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Depth

Depth Range (m): 5 (S) - 50 (S)
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Physical Description

Morphology

Size

Length max (cm): 120.0 (S)
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Size

Maximum size: 1100 mm TL
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Max. size

110 cm TL (male/unsexed; (Ref. 9118))
  • Chao, L.N. 1995 Sciaenidae. Corvinas, barbiches, bombaches, corvinatas, corvinetas, corvinillas, lambes, pescadillas, roncachos, verrugatos. p. 1427-1518. In W. Fischer, F. Krupp, W. Schneider, C. Sommer, K.E. Carpenter and V. Niem (eds.) Guia FAO para identificacion de especies para los fines de la pesca. Pacifico Centro-oriental. 3 volumes. 1813 p. (Ref. 9118)   http://www.fishbase.org/references/FBRefSummary.php?id=9118&speccode=13985 External link.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This benthopelagic species inhabits coastal waters, such as estuaries and inshore bays to depths of 50 m. It can be found over sand and mud substrates, and within the vicinity of mangrove forests.

Systems
  • Marine
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Environment

benthopelagic; marine
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Depth range based on 3 specimens in 1 taxon.

Environmental ranges
  Depth range (m): 9.2 - 31

Graphical representation

Depth range (m): 9.2 - 31
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Salinity: Marine, Marine Only

Inshore/Offshore: Inshore, Inshore Only

Water Column Position: Mid Water, Near Bottom, Bottom + water column

Habitat: Soft bottom (mud, sand,gravel, beach, estuary & mangrove), Sand & gravel, Water column

FishBase Habitat: Bentho-Pelagic
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Trophic Strategy

Feeding

Feeding Group: Carnivore

Diet: mobile benthic crustacea (shrimps/crabs), octopus/squid/cuttlefish, bony fishes
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Life History and Behavior

Reproduction

Egg Type: Pelagic, Pelagic larva
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Chao, L.N. & Espinosa-Perez, H.

Reviewer/s
Collen, B., Richman, N., Beresford, A., Chenery, A. & Ram, M.

Contributor/s
De Silva, R., Milligan, H., Lutz, M., Batchelor, A., Jopling, B., Kemp, K., Lewis, S., Lintott, P., Sears, J., Wilson, P., Smith, J. & Livingston, F.

Justification
This species is common throughout its relatively restricted range. However, more information is needed to assess the impact of fishing activities on this species population. It is listed as Data Deficient.
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IUCN Red List: Not evaluated / Listed

CITES: Not listed
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Population

Population
This species is common, based on its presence in local artisinal markets.

Population Trend
Unknown
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Threats

Major Threats
This species is targeted commercially and by artisinal fishers. It can be found regularly in local markets. Given its relatively restricted distribution in the Eastern Pacific region, the extent of population decline from its capture by commercial and artisinal fisheries is unknown.
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions

There are no conservation measures known for this species. However, this species distribution falls into a number of Marine Protected Areas in the Eastern Tropical Pacific (WDPA 2006).

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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: minor commercial; price category: medium; price reliability: questionable: based on ex-vessel price for species in this genus
  • Chao, L.N. 1995 Sciaenidae. Corvinas, barbiches, bombaches, corvinatas, corvinetas, corvinillas, lambes, pescadillas, roncachos, verrugatos. p. 1427-1518. In W. Fischer, F. Krupp, W. Schneider, C. Sommer, K.E. Carpenter and V. Niem (eds.) Guia FAO para identificacion de especies para los fines de la pesca. Pacifico Centro-oriental. 3 volumes. 1813 p. (Ref. 9118)   http://www.fishbase.org/references/FBRefSummary.php?id=9118&speccode=13985 External link.
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