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Overview

Comprehensive Description

Biology

Are benthopelagic in coastal areas (Ref. 9283). Marketed fresh and salted or dried (Ref. 9283).
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Description

  Common names: jack (English), hojarán (Espanol), medregal (Espanol)
 
Seriola peruana Steindachner, 1881


Fortune jack



Elongate, fusiform, compressed; upper body profile more convex than lower profile; snout short, rounded; mouth ends just behind center of pupil, supramaxilla bone above top jawbone moderately wide; gill rakers (excluding rudiments) 30-34; dorsal fin with VII-VIII spines (front spines may be imbedded in very large fish), then a notch before I, 31-35; anal fin II isolated spines (reduced or embedded in large fish) + I, 20-22, its base much shorter than soft dorsal base; pectoral short (< head length); no isolated finlets after dorsal and anal fins; tail base with grooves on dorsal and ventral surface of tail fin base, but no lateral fleshy keel; lateral line with slight arch over pectoral region; no scutes (hard spiny scales) on lateral line.



Olivaceous to bluish on back, sides silvery to slightly bronzy; fins somewhat dusky; no bars or stripe on head or body. Juvenile: membranes of 2nd  dorsal and anal fins dark.

Size: reaches at least 92 cm, common to 40 cm.

Habitat: coastal pelagic and demersal.

Depth: 0-30 m.

The SW Gulf of California to Chile, including the Galapagos and Malpelo.   
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Distribution

Range Description

This tropical eastern Pacific species is found from the southwest Gulf of California to Chile, including the Galapagos archipelago and Malpelo Island.
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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, Continent + Island (s), Continent, Island (s)

Residency: Resident

Climate Zone: Northern Subtropical (Cortez Province + Sinaloan Gap), Northern Tropical (Mexican Province to Nicaragua + Revillagigedos), Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo), South Temperate (Peruvian Province )
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Eastern Pacific: Mexico to Ecuador and the Galapagos Islands.
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Eastern Pacific: Gulf of California to Ecuador and Galápagos Islands.
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Depth

Depth Range (m): 0 (S) - 30 (S)
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Physical Description

Morphology

Size

Length max (cm): 92.0 (S)
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Size

Maximum size: 570 mm FL
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Max. size

57.0 cm FL (male/unsexed; (Ref. 9283))
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Diagnostic Description

Body slender, elongate, and little compressed; supra-maxillary moderately wide, its posterior end reaching the center of the eye; lower branch of first gill arch with 21 to 23 gill rakers in individuals more than 20cm long; anterior lobe of second dorsal fin moderately deep; lateral line without scutes; caudal peduncle with dorsal and ventral fossae; back violet brown to bluish green; flanks and belly pale; pectoral and caudal fins yellowish; pelvic fins white; dorsal and anal fins mostly dark (Ref. 55763).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
This is a benthopelagic and demersal species found in coastal areas (Smith-Vaniz 1995), including rocky reef areas. This species is found to 30m.

Systems
  • Marine
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Environment

benthopelagic; marine
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Depth range based on 3 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 3.5 - 132
  Temperature range (°C): 14.235 - 14.235
  Nitrate (umol/L): 31.396 - 31.396
  Salinity (PPS): 34.888 - 34.888
  Oxygen (ml/l): 0.376 - 0.376
  Phosphate (umol/l): 2.256 - 2.256
  Silicate (umol/l): 23.940 - 23.940

Graphical representation

Depth range (m): 3.5 - 132
 
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: Near Surface, Mid Water, Near Bottom, Bottom, Bottom + water column

Habitat: Reef (rock &/or coral), Rocks, Reef associated (reef + edges-water column & soft bottom), 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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Diseases and Parasites

Epitheliocystis. Bacterial diseases
  • Lannan, C.N., J.L. Batholomew and J.L. Fryer 1999 Chlamydial infections of fish: Epitheliocystis. p.255-267. In P.T.K. Woo and D.W. Bruno (eds.) Fish Diseases and Disorders Vol. 3: Viral, bacterial and fungal infections. CABI Int'l. (Ref. 48851)
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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
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
Smith-Vaniz, B, Robertson, R., Dominici-Arosemena, A. & Molina, H.

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

Contributor/s

Justification
This species is widespread in tropical eastern Pacific. There are no major threats to 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
There is no population information available for this species.

Population Trend
Unknown
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Threats

Major Threats
There are no major threats known for this species.


This species is caught in artisanal fisheries.
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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 species specific conservation measures. However, this species' distribution includes a number of Marine Protected Areas in the tropical eastern Pacific region.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: minor commercial; gamefish: yes; price category: very high; price reliability: questionable: based on ex-vessel price for species in this genus
  • Coppola, S.R., W. Fischer, L. Garibaldi, N. Scialabba and K.E. Carpenter 1994 SPECIESDAB: Global species database for fishery purposes. User's manual. FAO Computerized Information Series (Fisheries). No. 9. Rome, FAO. 103 p. (Ref. 171)
  • Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott 1991 World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537)
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