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Isopsetta isolepis (Lockington, 1880)

Butter sole
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Native range | All suitable habitat | Point map | Year 2050
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Isopsetta isolepis   AquaMaps   Data sources: GBIF OBIS
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Image of Isopsetta isolepis (Butter sole)
Isopsetta isolepis
Picture by Archipelago Marine Research Ltd.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Pleuronectiformes (Flatfishes) > Pleuronectidae (Righteye flounders) > Pleuronectinae
Etymology: Isopsetta: Greek, isos = equal + Greek, psetta, grouper.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; demersal; oceanodromous (Ref. 51243); depth range 20 - 425 m (Ref. 6793). Temperate; 66°N - 32°N

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

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

Length at first maturity / Size / Weight / Age

Maturity: Lm 21.0  range ? - ? cm
Max length : 55.0 cm TL male/unsexed; (Ref. 2850); max. reported age: 11 years (Ref. 6885)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 0; Dorsal soft rays (total): 78 - 92; Anal spines: 0; Anal soft rays: 58 - 69; Vertebrae: 39 - 42. Dorsal origin above eye. Caudal rounded. Pectoral small, bluntly pointed.

Biology     Glossary (e.g. epibenthic)

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).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Amaoka, Kunio | Collaborators

Vinnikov, K.A., R.C. Thomson and T.A. Munroe, 2018. Revised classification of the righteye flounders (Teleostei: Pleuronectidae) based on multilocus phylogeny with complete taxon sampling. Molecular phylogenetics and evolution, 125:147-162. (Ref. 122998)

IUCN Red List Status (Ref. 130435: Version 2024-2)

  Least Concern (LC) ; Date assessed: 13 August 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: minor commercial; gamefish: yes
FAO - Publication: search | FishSource |

More information

Trophic ecology
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Length-weight rel.
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References

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Summary page | Point data | Common names | Photos

Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | OceanAdapt | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 123201): 1.1 - 7.6, mean 4.7 °C (based on 300 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 1.0000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00912 (0.00453 - 0.01836), b=3.10 (2.93 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.6   ±0.54 se; based on food items.
Generation time: 4.2 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.26; tmax=11; tm=2).
Fishing Vulnerability (Ref. 59153):  Low to moderate vulnerability (35 of 100).
Price category (Ref. 80766):   Medium.
Nutrients (Ref. 124155):  Calcium = 35.2 [13.5, 60.7] mg/100g; Iron = 0.281 [0.139, 0.548] mg/100g; Protein = 18.1 [15.6, 20.1] %; Omega3 = 0.367 [0.180, 0.767] g/100g; Selenium = 20.8 [10.7, 45.2] μg/100g; VitaminA = 6.76 [1.59, 30.94] μg/100g; Zinc = 0.387 [0.261, 0.583] mg/100g (wet weight); based on nutrient studies.