Syacium ovale — Details

Oval Flounder learn more about names for this taxon

Overview

Comprehensive Description

Biology

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Inhabits flat sand bottoms (Ref. 11482). Feeds on small fishes and crustaceans (Ref. 28023). Marketed fresh.
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Description

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Common names: flounder (English), lenguado (Espanol)
 
Syacium ovale (Günther, 1864)


Oval flounder



Body height 39-48% of SL; head length 26-30% of SL; snout with slight concavity before top eye; snout length before top eye < 24% of head length; eyes on left side; eyes ~ parallel; width between eyes < 6% of head length; mouth of moderate length, 32-38% of head length, ends under mid-eye; jaws on blind side not arched;  fixed teeth in 2 rows in upper jaw, 1 row lower jaw; 7-9 short, fat, serrated lower gill rakers; dorsal rays 83-91; 64-71 anal rays; pectoral fin 59-71% head length in both sexes; base of eye side pelvic on midline of body; tail base 33-45% of SL); urinary papilla on blind side, immediately behind anus; lateral line not extending onto head, starts at corner of operculum, relatively straight; 52-58 lateral line scales; scales very rough in eye-side, smooth an blind side.

Color variable from more or less uniform brown to brown with numerous dark spots that extend onto median fins.


Size: to about 25 cm.

Inhabits flat sand bottoms between 9 and 40 m.


Depth: 10-60 m.

Southern Baja and the Gulf of California to Peru; the Revillagigedos Islands, rarely in the Galapagos.

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Distribution

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Eastern Pacific: Mexico to Peru.
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Range Description

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This species is endemic to the Eastern Pacific, and is found from southern Baja California and the Gulf of California to Peru, including Cocos, the Galapagos and the Revillagigedo Islands.
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Eastern central Pacific.
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Depth

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Depth Range (m): 10 (S) - 60 (S)
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Zoogeography

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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: North Temperate (Californian Province &/or Northern Gulf of California), 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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Physical Description

Morphology

Size

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Length max (cm): 25.0 (S)
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Size

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Maximum size: 230 mm TL
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Max. size

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23.0 cm TL (male/unsexed; (Ref. 9330))
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Ecology

Habitat

Environment

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demersal; marine; depth range 9 - 40 m (Ref. 9330)
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Habitat and Ecology

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Habitat and Ecology
This benthic species inhabits flat sand and sandy mud bottoms to depths of 77m. It may also enter estuaries and brackish waters (Hensley, 1995).

Systems
  • Freshwater
  • Marine
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Depth range based on 112 specimens in 1 taxon.
Water temperature and chemistry ranges based on 12 samples.

Environmental ranges
  Depth range (m): 1.8 - 289
  Temperature range (°C): 7.362 - 27.859
  Nitrate (umol/L): 0.616 - 34.290
  Salinity (PPS): 34.087 - 35.999
  Oxygen (ml/l): 1.386 - 5.139
  Phosphate (umol/l): 0.071 - 2.642
  Silicate (umol/l): 3.091 - 54.807

Graphical representation

Depth range (m): 1.8 - 289

Temperature range (°C): 7.362 - 27.859

Nitrate (umol/L): 0.616 - 34.290

Salinity (PPS): 34.087 - 35.999

Oxygen (ml/l): 1.386 - 5.139

Phosphate (umol/l): 0.071 - 2.642

Silicate (umol/l): 3.091 - 54.807
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Depth: 9 - 40m.
From 9 to 40 meters.

Habitat: demersal.
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Salinity: Marine, Brackish

Inshore/Offshore: Inshore, Inshore Only

Water Column Position: Bottom, Bottom only

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

FishBase Habitat: Demersal
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Trophic Strategy

Feeding

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Feeding Group: Carnivore

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

Reproduction

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Egg Type: Pelagic, Pelagic larva
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Syacium ovale

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The following is a representative barcode sequence, the centroid of all available sequences for this species.


No available public DNA sequences.

Download FASTA File
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Statistics of barcoding coverage: Syacium ovale

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Barcode of Life Data Systems (BOLDS) Stats
Public Records: 3
Specimens with Barcodes: 3
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2010

Assessor/s
van der Heiden, A.

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

Justification
This species is widespread in the Eastern Pacific, and is common throughout 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

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Population
No population information is available for this species. However, it is considered common throughout its range.

Population Trend
Unknown
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Threats

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Least Concern (LC)
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Major Threats
There are no major threats known for this species. However, it is sometimes caught as bycatch for shrimp fisheries and also may be affected by localized coastal development and mangrove destruction.
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Management

Conservation Actions

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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

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fisheries: minor commercial; price category: very high; price reliability: unreliable: based on ex-vessel price for species in this order
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