Holohalaelurus regani, Izak catshark

Holohalaelurus regani (Gilchrist, 1922)

Izak catshark
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Holohalaelurus regani   AquaMaps   Data sources: GBIF OBIS
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Holohalaelurus regani
Juvenile Afbeelding van Le Noury, P.

Classificatie / Namen Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (haaien en roggen) (sharks and rays) > Carcharhiniformes (Ground sharks) > Pentanchidae (Deepwater catsharks)
Etymology: Holohalaelurus: holos (Gr.), whole or entire, i.e., being a form of Halaeurus without any labial folds or grooves in the mouth (See ETYFish)regani: In honor of English ichthyologist Charles Tate Regan (1878-1943), Natural History Museum (London), who described many South African fishes (See ETYFish).
Eponymy: Charles Tate Regan (1878–1943) was a British ichthyologist. [...] (Ref. 128868), visit book page.

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

marien bathydemersaal; diepte ? - 1075 m (Ref. 75585), usually 150 - 300 m (Ref. 75585). Deep-water; 4°S - 37°S

Verspreiding Gebieden | FAO regio's | Ecosystemen | Voorkomen | Verspreidingskaart | Introducties | Faunafri

Indian Ocean from Durban, kwaZulu-Natal, South Africa, southwards and westwards to Cape Agulhas; westward into the Atlantic Ocean; northwards to southeast of Lüderitz, Namibia.

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 69.0 cm TL mannelijk / geslacht onbekend; (Ref. 5578)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 0; Anale stekels: 0. A broad-headed catshark with crowded dark brown spots on a yellowish background, producing a net-like pattern of light lines; underside white with small black pores; no labial furrows (Ref. 5578). Specimens less than 23 cm TL blackish with white side spots (Ref. 5578).
Body shape (shape guide): elongated.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Found on the outer continental shelf and upper slope, on or near the bottom (Ref. 244). This species has been reported to prefer temperate to cool temperate waters, but may also be found in subtropical waters; apparently prefer 200-300 m depths on the west coast and 100-200 m depths on the south coast; and, a common by catch of demersal trawlers (Ref. 75585). Feeds mainly on pelagic bony fishes, also fish offal, hagfish eggs, crustaceans, and cephalopods (Ref. 5578). Oviparous (Ref. 50449).

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Oviparous, with one egg laid per oviduct at a time (Ref. 5578). Embryos feed solely on yolk (Ref. 50449).

Hoofdreferentie Upload uw referenties | Referenties | Coördinator | Medewerkers

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Niet bedreigd (LC) ; Date assessed: 01 August 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

FAO - Publication: search | FishSource |

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Schattingen op basis van modellen

Gewenste temperatuur (Ref. 123201): 9 - 15.8, mean 10.5 °C (based on 54 cells).
Fylogenetische diversiteitsindex (Ref. 82804):  PD50 = 0.5312   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00347 (0.00172 - 0.00698), b=3.08 (2.90 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trofisch niveau (Ref. 69278):  4.2   ±0.5 se; based on diet studies.
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).
Kwetsbaarheid van de visserij (Ref. 59153):  Moderate to high vulnerability (48 of 100). 🛈
Voedingsstoffen (Ref. 124155):  Calcium = 8.87 [1.57, 53.86] mg/100g; Iron = 0.345 [0.073, 1.156] mg/100g; Protein = 17.2 [14.0, 20.3] %; Omega3 = 0.222 [0.091, 0.543] g/100g; Selenium = 13 [4, 40] μg/100g; VitaminA = 13.9 [3.1, 62.5] μg/100g; Zinc = 0.294 [0.145, 0.560] mg/100g (wet weight);