Polysteganus praeorbitalis, Scotsman seabream : fisheries

Polysteganus praeorbitalis (Günther, 1859)

Scotsman seabream
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Polysteganus praeorbitalis   AquaMaps   Data sources: GBIF OBIS
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Image of Polysteganus praeorbitalis (Scotsman seabream)
Polysteganus praeorbitalis
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Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Eupercaria/misc (Various families in series Eupercaria) > Sparidae (Porgies)
Etymology: Polysteganus: Greek, polys = a lot of + Greek, stego, stege = covered (Ref. 45335).
More on author: Günther.

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

Marine; reef-associated; depth range 20 - 100 m (Ref. 3198). Subtropical; 17°S - 28°S

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

Western Indian Ocean: known only from Beira, Mozambique to Algoa Bay, South Africa.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 90.0 cm TL male/unsexed; (Ref. 3198); common length : 35.0 cm TL male/unsexed; (Ref. 3507); max. published weight: 7.8 kg (Ref. 40637)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 12; Dorsal soft rays (total): 10; Anal spines: 3; Anal soft rays: 8. Small eye, deep preorbital, steep forehead (Ref. 3198).
Body shape (shape guide): fusiform / normal.

Biology     Glossary (e.g. epibenthic)

Occurs in deep offshore reefs ranging from 20 to 100 m. Feeds on large crabs, crayfish, a variety of reef fish and squid. Spawns in winter. Sold fresh (Ref. 3507).

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

Main reference Upload your references | References | Coordinator | Collaborators

Smith, J.L.B. and M.M. Smith, 1986. Sparidae. p. 580-594. In M.M. Smith and P.C. Heemstra (eds.) Smiths' sea fishes. Springer-Verlag, Berlin. (Ref. 3198)

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

  Vulnerable (VU) (A2bd); Date assessed: 11 July 2024

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

Fisheries: commercial
FAO - Publication: search | FishSource |

More information

Trophic ecology
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Diet composition
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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 | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GloBI | Google Books | Google Scholar | Google | IGFA World Record | 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 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.01778 (0.00967 - 0.03270), b=3.03 (2.88 - 3.18), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level
(Ref. 69278) 		4.5   ±0.80 se; based on food items.
Resilience
(Ref. 120179) 		Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability
(Ref. 59153) 		High vulnerability (65 of 100). 🛈
Price category
(Ref. 80766) 		Very high.
Nutrients
(Ref. 124155) 		Calcium = 18 [8, 28] mg/100g; Iron = 0.516 [0.257, 1.003] mg/100g; Protein = 20.6 [19.5, 21.8] %; Omega3 = 0.224 [0.129, 0.400] g/100g; Selenium = 18.1 [8.4, 37.2] μg/100g; VitaminA = 63.5 [19.0, 207.2] μg/100g; Zinc = 0.509 [0.332, 0.761] mg/100g (wet weight);