Rexea solandri, Silver gemfish : fisheries

Rexea solandri (Cuvier, 1832)

Silver gemfish
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Rexea solandri   AquaMaps   Data sources: GBIF OBIS
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Image of Rexea solandri (Silver gemfish)
Rexea solandri
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Klassifizierung / Names Namen | Synonyme | Catalog of Fishes(Gattung, Arten) | ITIS | CoL | WoRMS | Cloffa

> Scombriformes (Mackerels) > Gempylidae (Snake mackerels)
Etymology: Rexea: Latin, rex, rego = king.
Eponymy: Daniel Carl [Karl] Solander (1733–1782) was a Swedish naturalist and explorer who was one of Linnaeus’s pupils at Uppsala. [...] (Ref. 128868), visit book page.
More on author: Cuvier.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

seewasser benthopelagisch; ozeanodrom (Ref. 51243); tiefenbereich 100 - 800 m (Ref. 6181), usually 300 - 450 m (Ref. 28786). Deep-water; 25°S - 48°S, 109°E - 173°W (Ref. 6181)

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Southwest Pacific: off southern, southwestern and southeastern Australia, Tasmania and New Zealand. Occurrence records from Madagascar and Japan need to be verified.

Länge bei der ersten Reifung / Größe / Gewicht / Alter

Geschlechtsreife: Lm 65.0, range 60 - 70 cm
Max length : 110 cm SL Männchen/unbestimmt; (Ref. 6181); max. veröff. Gewicht: 16.0 kg (Ref. 28838); max. veröff. Alter: 16 Jahre (Ref. 28789)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 18 - 19; Rückenflossenweichstrahlen (insgesamt) : 16 - 19; Afterflossenstacheln: 2; Afterflossenweichstrahlen: 13 - 16; Wirbelzahl: 36. Body entirely scaled at over 25 cm SL. Lateral line branching below the 5th to the 6th spine of the first dorsal fin. The upper branch reaches beyond the origin of the second dorsal fin, usually ending between the 8th to the 12th soft ray. The lower branch runs mid laterally, undulating above the anal-fin base. Body is bluish above, silvery below, a black blotch distally on two anterior membranes of the first dorsal fin, the rest of the fin is grayish.
Body shape (shape guide): elongated; Cross section: compressed.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Found in schools on continental shelf and slope. They are normally caught close to the sea bed but probably move into midwater at times (Ref. 28786). Juveniles are pelagic, adults also occur near the surface off Tasmania and New Zealand. Dense schools of pre-spawners migrate along the continental slope at about 400 m during winter (Ref. 9563). Feed on fish, squid and crustaceans. The flesh is of good edible quality and especially tasty when smoked. In Australia, the eastern gemfish stock has been subjected to a prolonged period of poor recruitment which started in 1989 (Ref. 28843, 28786). This event resulted in a very significant decline in the gemfish resource. In Australia, efforts are now being channeled towards the recovery of the fishery.

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

Larvae are caught in inshore waters which may indicate that gemfish move onto the shelf to spawn, or currents carry larvae in from offshore spawning grounds (Ref. 28786).

Hauptreferenz Laden Sie Ihre Referenzen hoch | Referenzen | Koordinator : Parin, Nikolay V. | Partner

Nakamura, I. and N.V. Parin, 1993. FAO Species Catalogue. Vol. 15. Snake mackerels and cutlassfishes of the world (families Gempylidae and Trichiuridae). An annotated and illustrated catalogue of the snake mackerels, snoeks, escolars, gemfishes, sackfishes, domine, oilfish, cutlassfishes,. scabbardfishes, hairtails, and frostfishes known to date. FAO Fish. Synop. 125(15):136 p. (Ref. 6181)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))


CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: kommerziell
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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex
(Ref. 82804) 		PD50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00339 (0.00188 - 0.00609), b=3.14 (2.98 - 3.30), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophische Ebene
(Ref. 69278) 		4.3   ±0.66 se; based on food items.
Generation time 5.4 (4.5 - 6.6) years. Estimated as median ln(3)/K based on 14 growth studies.
Widerstandsfähigkeit
(Ref. 120179) 		niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (K=0.11-0.21; tm=3-6; tmax=16; Fec=500,000).
Rate of population increase Prior r = 0.43, 95% CL = 0.28 - 0.64, Based on 2 full stock assessments.
Anfälligkeit der Fischerei
(Ref. 59153) 		High vulnerability (58 of 100). 🛈
Klimaanfälligkeit
(Ref. 125649) 		High to very high vulnerability (65 of 100). 🛈
Preiskategorie
(Ref. 80766) 		Very high.
Nährstoffe
(Ref. 124155) 		Calcium = 11 [4, 29] mg/100g; Iron = 0.306 [0.113, 0.902] mg/100g; Protein = 15.6 [13.2, 18.3] %; Omega3 = 0.228 [0.114, 0.465] g/100g; Selenium = 25.8 [10.5, 61.4] μg/100g; VitaminA = 15.4 [3.4, 72.8] μg/100g; Zinc = 0.291 [0.195, 0.444] mg/100g (wet weight); based on nutrient studies.