Isopsetta isolepis

Common in shallow water on soft, silty bottom. Moves into shallow water in summer and to deeper water in winter (Ref. 6885). Spawning adults exhibit north-south migrations (Ref. 6885). Feeds on chaetopod marine worms, young herring, shrimps, and sand dollars (Ref. 6885). A tasty food fish, sometimes marketed (Ref. 2850). Also used for mink food (Ref. 2850).

Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

Eastern Pacific: Bristol Bay in the southeastern Bering Sea and Amchitka Island (Aleutian Islands) to Ventura, California, USA.

Eastern North Pacific.

Dorsal spines (total): 0; Dorsal soft rays (total): 78 - 92; Analspines: 0; Analsoft rays: 58 - 69; Vertebrae: 39 - 42

Maximum size: 550 mm TL

55.0 cm TL (male/unsexed; (Ref. 2850)); max. reported age: 11 years (Ref. 6885)

Dorsal origin above eye. Caudal rounded. Pectoral small, bluntly pointed.

Habitat Type: Marine

demersal; oceanodromous (Ref. 51243); marine; depth range 20 - 425 m (Ref. 6793)

Depth range based on 84 specimens in 1 taxon.
Water temperature and chemistry ranges based on 21 samples.

Environmental ranges
  Depth range (m): 0 - 834
  Temperature range (°C): 4.528 - 10.311
  Nitrate (umol/L): 7.143 - 42.451
  Salinity (PPS): 31.896 - 34.376
  Oxygen (ml/l): 0.464 - 7.392
  Phosphate (umol/l): 0.996 - 3.485
  Silicate (umol/l): 12.816 - 108.439

Graphical representation

Depth range (m): 0 - 834

Temperature range (°C): 4.528 - 10.311

Nitrate (umol/L): 7.143 - 42.451

Salinity (PPS): 31.896 - 34.376

Oxygen (ml/l): 0.464 - 7.392

Phosphate (umol/l): 0.996 - 3.485

Silicate (umol/l): 12.816 - 108.439
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Depth: 20 - 425m.
From 20 to 425 meters.

Habitat: demersal.

Non-Migrant: No. All populations of this species make significant seasonal migrations.

Locally Migrant: No. No populations of this species make local extended movements (generally less than 200 km) at particular times of the year (e.g., to breeding or wintering grounds, to hibernation sites).

Locally Migrant: No. No populations of this species make annual migrations of over 200 km.

Oceanodromous. Migrating within oceans typically between spawning and different feeding areas, as tunas do. Migrations should be cyclical and predictable and cover more than 100 km.

Feeds on fish and benthic invertebrates (Ref. 6885).

Canada

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: GNR - Not Yet Ranked

Not Evaluated

fisheries: minor commercial; gamefish: yes; price category: medium; price reliability: very questionable: based on ex-vessel price for species in this family