Overview

Comprehensive Description

Description

  Common names: weakfish (English), corvina (Espanol)
 
Macrodon mordax (Gilbert & Starks, 1904)


Dog-tooth weakfish,     Toothed weakfish



Body elongate, compressed; eye moderately large; mouth oblique, large, lower jaw projecting; chin with minute pores, no barbells; teeth large, pointed, with large canines at front, those on top jaw strongly curved, with arrow-head tips; gill rakers 9-11; preopercle edge smooth; dorsal rays IX-X+I, 27-30; anal fin I-II weak spines, 9-10, with short base; pectorals long, reaching beyond tips of depressed pelvic fins; edge of tail fin S shaped; scales small, smooth; soft dorsal and anal entirely scaled; pored lateral-line scales 45-55.

Silvery, bluish or greenish greyish on upper back; axil of pectoral fin dark; fins whitish to slightly dusky.

Size: grows to 50 cm.

Inhabits coastal waters, including bays and estuaries.

Depth: 5-30 m.

Costa Rica to Ecuador.   
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Biology

Inhabits coastal waters, bays, and estuaries (Ref. 9118). Feeds on crustaceans, fishes and cephalopods (Ref. 9118). Considered a good food fish (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 Pacific, and is found from Costa Rica to Ecuador.
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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 Pacific: Panama to Ecuador.
  • 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) - 30 (S)
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Physical Description

Morphology

Size

Length max (cm): 50.0 (S)
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Size

Maximum size: 500 mm TL
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Max. size

50.0 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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Type Information

Cotype for Sagenichthys mordax
Catalog Number: USNM 50401
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Collector(s): C. Gilbert & et al.
Year Collected: 1896
Locality: Canas, behind Isla Raya., Los Santos Province, Panama, Pacific
  • Cotype:
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This benthopelagic species inhabits coastal waters, bays, and estuaries to depths of 30 m. It feeds on crustaceans, fishes and cephalopods.

Systems
  • Marine
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Environment

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

Environmental ranges
  Depth range (m): 12.8 - 18.5

Graphical representation

Depth range (m): 12.8 - 18.5
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Salinity: Marine, Brackish

Inshore/Offshore: Inshore, Inshore Only

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

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

FishBase Habitat: Bentho-Pelagic
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Trophic Strategy

Inhabits coastal waters, bays, and estuaries. Feeds on crustaceans, fishes and cephalopods.
  • 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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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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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Macrodon mordax

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 2
Species With Barcodes: 1
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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. & Espinosa, H.

Reviewer/s
Carpenter, K., Polidoro, B. & Livingstone, S. (Global Marine Species Assessment Team)

Contributor/s

Justification
This species is has a relatively restricted range in the Eastern Pacific. Little is known about its population status, but it is targeted in commercial, artisanal and sport fisheries throughout its range. More information is needed to determine 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
No population information is available for this species.

Population Trend
Unknown
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Threats

Major Threats
This species has a relatively restricted near-shore range and is a highly valued food fish that is targeted by commercial, artisanal, and sport fisheries throughout its range. However, the impact of fishing activities on this species' population is unknown.
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions
There are no known conservation measures for this species. However, its distribution falls partially into a number of Marine Protected Areas in the Eastern Pacific region (WDPA 2006). More research is needed on the impact of fishing activities on this species' population.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial
  • 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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