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Overview

Comprehensive Description

Description

  Common names: weakfish (English), cachema (Espanol)
 
Cynoscion analis (Jenyns, 1842)

Peruvian weakfish

Elongate, fusiform, compressed, oval cross-section; head deep, long, 36% of SL; ridge down front of snout; eye moderate; mouth distinctly oblique, lower jaw prominently projecting; front of top jaws with 1 pair of large pointed canines; no barbels or pores on chin; gill rakers long and slender, 8-9 lower rakers; preoperculum smooth; dorsal with long base, a small gap separating the two parts, IX-X + I, 22-24;  anal fin with  II small (< ½ length of 1st  ray) weak spines, 13-15; pectoral fins relatively long, reaching pelvic tip; rear margin of tail slightly concave; all scales smooth; lateral line straights; inner 3/4 of membranes on soft dorsal and anal fins scaled; pored lateral-line scales about 54-63; lateral line scales larger than adjacent scales, and with small accessory scales.


Back silvery blue, silvery below; all fins except pelvic dark grey, pelvic mid grey; tip of lower jaw dark.


Size: 45 cm.

Habitat: coastal, marine; juveniles enter estuaries and shallow bays.

Depth: 1-50 m.

Colombia to Peru.
   
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Biology

Common species found in coastal waters (Ref. 9118). Juveniles enter estuaries and shallow bays (Ref. 9118). Feeds mainly on shrimps and fishes (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)
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Distribution

Range Description

This species is endemic to the Eastern Pacific, and is found from Colombia to northern Peru.
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Zoogeography

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

Regional Endemism: All species, Tropical Eastern Pacific (TEP) non-endemic, Temperate Eastern Pacific, primarily, Peruvian province, primarily, Continent, Continent only

Residency: Resident

Climate Zone: Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo), South Temperate (Peruvian Province )
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Eastern Pacific: Santa Elena, Ecuador to Coquimbo, Chile.
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Eastern Pacific.
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Depth

Depth Range (m): 1 (S) - 50 (S)
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Physical Description

Morphology

Size

Length max (cm): 45.0 (S)
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Size

Maximum size: 450 mm TL
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Max. size

47.0 cm TL (male/unsexed; (Ref. 55763))
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This demersal species is found in coastal waters to depths of 50 m. Juveniles enter estuaries and shallow bays. It feeds mainly on shrimps and fishes.

Systems
  • Marine
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Environment

demersal; brackish; marine; depth range 10 - ? m (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)
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Depth range based on 1 specimen in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 67.5 - 67.5
  Temperature range (°C): 15.505 - 15.505
  Nitrate (umol/L): 23.574 - 23.574
  Salinity (PPS): 34.996 - 34.996
  Oxygen (ml/l): 0.976 - 0.976
  Phosphate (umol/l): 2.000 - 2.000
  Silicate (umol/l): 19.804 - 19.804
 
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), Sand & gravel, Estuary, Water column

FishBase Habitat: Demersal
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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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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Cynoscion analis

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

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 relatively widespread in the Eastern Pacific, and is common in at least part of its range. There are no major threats for this species, and no current indication of population decline. It is listed as Least Concern.
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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. It is considered a common species.

Population Trend
Unknown
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Threats

Major Threats
There are no major threats known for this species.
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Least Concern (LC)
  • IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006.
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Management

Conservation Actions

Conservation Actions
There are no known conservation measures for this species. However, this species' distribution falls partially into a number of Marine Protected Areas in the Eastern Pacific region (WDPA 2006).
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: commercial; aquarium: commercial
  • Food and Agriculture Organization of the United Nations 1992 FAO yearbook 1990. Fishery statistics. Catches and landings. FAO Fish. Ser. (38). FAO Stat. Ser. 70:(105):647 p. (Ref. 4931)
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