Phrynorhombus norvegicus, Norwegian topknot

Phrynorhombus norvegicus (Günther, 1862)

Norwegian topknot
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Phrynorhombus norvegicus   AquaMaps   Data sources: GBIF OBIS
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Image of Phrynorhombus norvegicus (Norwegian topknot)
Phrynorhombus norvegicus
Picture by Svensen, E.

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

Teleostei (teleosts) > Pleuronectiformes (Flatfishes) > Scophthalmidae (Turbots)
Etymology: Phrynorhombus: Greek, phryne = toad + Greek, rhombos = paralelogram (Ref. 45335).
More on author: Günther.

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

Marine; demersal; depth range 10 - 200 m (Ref. 35388), usually 10 - 200 m (Ref. 35388). Temperate; 73°N - 46°N, 25°W - 25°E

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

Northeast Atlantic: off Iceland and from Murman coast to Bay of Biscay.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 12.0 cm SL male/unsexed; (Ref. 4703)

Short description Identification keys | Morphology | Morphometrics

Rough scales on both sides. Dorsal fin origin above upper eye. Pelvic and anal fins not used (Ref. 35388).
Body shape (shape guide): short and / or deep.

Biology     Glossary (e.g. epibenthic)

Occurs on rocky bottoms between 10 and 180 m. Feeds on small fish and invertebrates (Ref. 4703). Spawns in April - July (Ref. 35388).

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

Main reference Upload your references | References | Coordinator | Collaborators

Nielsen, J.G., 1986. Scophthalmidae. p. 1287-1293. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the North-eastern Atlantic and the Mediterranean. UNESCO, Paris. Vol. 3. (Ref. 4703)

IUCN Red List Status (Ref. 130435: Version 2025-2 (Global))

  Least Concern (LC) ; Date assessed: 15 October 2013

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items (preys)
Diet composition
Food consumption
Food rations
Predators
Ecology
Ecology
Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Recruitment
Abundance
Life cycle
Reproduction
Maturity
Maturity/Gills rel.
Fecundity
Spawning
Spawning aggregations
Eggs
Egg development
Larvae
Larval dynamics
Distribution
Territories
FAO areas
Ecosystems
Occurrences
Introductions
BRUVS - Videos
Anatomy
Gill area
Brain
Otolith
Physiology
Body composition
Nutrients
Oxygen consumption
Swimming type
Swimming speed
Visual pigments
Fish sound
Diseases & Parasites
Toxicity (LC50s)
Genetics
Genome
Genetics
Heterozygosity
Heritability
Genetic Diversity
Human related
Aquaculture systems
Aquaculture profiles
Strains
Ciguatera cases
Stamps, coins, misc.
Outreach
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Taxonomy
Common names
Synonyms
Morphology
Morphometrics
Pictures
References
References

Tools

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Special reports

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Summary page | Point data | Common names | Photos

Internet sources

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

Estimates based on models

Phylogenetic diversity index
(Ref. 82804) 		PD50 = 1.0020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.01047 (0.00601 - 0.01824), b=3.00 (2.85 - 3.15), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level
(Ref. 69278) 		4.0   ±0.60 se; based on food items.
Generation time 1.8 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Resilience
(Ref. 120179) 		High, minimum population doubling time less than 15 months (K=0.6;).
Fishing Vulnerability
(Ref. 59153) 		Low vulnerability (23 of 100). 🛈
Nutrients
(Ref. 124155) 		Calcium = 63 [25, 118] mg/100g; Iron = 0.304 [0.117, 0.669] mg/100g; Protein = 17.8 [15.9, 19.7] %; Omega3 = 0.454 [0.192, 1.076] g/100g; Selenium = 12.3 [5.1, 30.8] μg/100g; VitaminA = 28 [5, 143] μg/100g; Zinc = 0.604 [0.363, 0.985] mg/100g (wet weight);