Glaucostegus cemiculus, Blackchin guitarfish : fisheries, gamefish

Glaucostegus cemiculus (Geoffroy Saint-Hilaire, 1817)

Blackchin guitarfish
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Glaucostegus cemiculus   AquaMaps   Data sources: GBIF OBIS
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  • Image of Glaucostegus cemiculus (Blackchin guitarfish)
    Glaucostegus cemiculus
    Picture by FishBase
  • Image of Glaucostegus cemiculus (Blackchin guitarfish)
    Glaucostegus cemiculus
    Juvenile picture by Wirtz, P.

Classification / Names Noms communs | Synonymes | Catalog of Fishes(Genre, Espèce) | ITIS | CoL | WoRMS | Cloffa

Élasmobranches (requins et raies) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Glaucostegidae (Giant guitarfishes)

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

; marin; saumâtre démersal; profondeur 9 - 100 m (Ref. ), usually - m (Ref. ).   Subtropical; 0°C - ; 42°N - 19°S, 19°W - 38°E (Ref. 114953)

Distribution Pays | Zones FAO | Écosystèmes | Occurrences | Point map | Introductions | Faunafri

Eastern Atlantic: northern Portugal to Angola, including the Mediterranean Sea.

Length at first maturity / Taille / Poids / Âge

Maturity: Lm ?, range 153 - 164 cm
Max length : 242 cm TL mâle / non sexé; (Ref. 40637); common length : 150 cm TL mâle / non sexé; (Ref. 3710); poids max. publié: 49.9 kg (Ref. 40637)

Description synthétique Morphologie | Morphométrie

Vertèbres: 68 - 73. This large to very large species has a plain beige to brownish wedge-shaped disc; long and rather broad triangular snout with a broadly rounded rostral cartilage at its tip and wide oblique nostrils with a narrow anterior opening; disc thickened centrally, length 1.2-1.3 times its width, anterior margins slightly undulate, often weakly concave before broadly rounded outer corner; snout moderately acute, its angle 59-63°, tip narrowly rounded not extended forward as a distinct lobe; large orbit, length 5-6 times in preorbital length, 1.5-2 in interorbital space; rostral ridges are narrowly separated posteriorly and almost joined anteriorly; 2 fleshy spiracular folds, with innermost fold smaller; upper jaw with 62-72 tooth rows; large and oblique nostrils, its length 1.4 in internasal width, ca 81 nasal lamellae, anterior nasal flaps are confined to anterior margin of nostril; rough skin covered entirely with small denticles; well-developed thorns, usually along edge of rostral cartilage and small patches around orbits and above spiracles; each shoulders with 1-3 thorns that persist in adults, a median row of enlarged thorns extending from nape to first dorsal fin, a few thorns between dorsal fin; long tail ca 1.5 times its disc length; dorsal fins are large and widely spaced, ca. 2.1 times base length of first dorsal fin, apices narrowly rounded; pectoral fin radials 68-73; 204-212 total vertebrae (Ref. 114953).

Biologie     Glossaire (ex. epibenthic)

A coastal and benthic species found on sandy and muddy bottoms, intertidal zone to at least 80 m depth. Feeds mainly on benthic crustaceans and small fishes. Maximum length would probably reach up to 265 cm TL, common at about 200 cm TL. Males mature at 138-154 cm TL, females at 153-164 cm TL. In the Mediterranean Sea, males mature at smaller size, about 100-110 cm TL and females at about 110 cm TL. Size at birth about 34 cm TL. Produces litters up to 20 pups (more common 6-7 pups) (Ref. 114953). Ovoviviparous, one or two litters per year, of 4-6 embryos.

Life cycle and mating behavior Maturité | Reproduction | Frai | Œufs | Fécondité | Larves

Exhibit ovoviparity (aplacental viviparity), with embryos feeding initially on yolk, then receiving additional nourishment from the mother by indirect absorption of uterine fluid enriched with mucus, fat or protein through specialised structures (Ref. 50449). One or two litters per year, of 4-6 embryos (Ref. 6675).

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Bauchot, M.-L., 1987. Raies et autres batoides. p. 845-886. In W. Fischer, M.L. Bauchot and M. Schneider (eds.) Fiches FAO d'identificationpour les besoins de la pêche. (rev. 1). Mèditerranée et mer Noire. Zone de pêche 37. Vol. II. Commission des Communautés Européennes and FAO, Rome. (Ref. 3261)

Statut dans la liste rouge de l'IUCN (Ref. 124695)

  Niveau de menace critique (CR) (A2d); Date assessed: 03 December 2018

CITES


CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless





Utilisations par l'homme

Pêcheries: intérêt commercial mineur; pêche sportive: oui
FAO - Publication: search | FishSource | Sea Around Us

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Sources Internet

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | FishWatcher | CISTI | Catalog of Fishes: Genre, Espèce | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: génôme, nucléotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Bases de données nationales | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Arbre de Vie | Wikipedia: aller à, chercher | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 19.2 - 27.9, mean 25.4 °C (based on 94 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5156   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00149 - 0.00929), b=3.09 (2.87 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Niveau trophique (Ref. 69278):  4.0   ±0.70 se; based on food items.
Generation time: 5.4 ( na - na) years. Estimated as median ln(3)/K based on 2 growth studies.
Résilience (Ref. 120179):  Très faible, temps minimum de doublement de population supérieur à 14 ans (Fec=4).
Vulnérabilité (Ref. 59153):  High vulnerability (55 of 100) .
Catégorie de prix (Ref. 80766):   Low.
Nutrients (Ref. 124155):  Calcium = 40.4 [7.3, 140.8] mg/100g ; Iron = 1.13 [0.29, 3.42] mg/100g ; Protein = 18.3 [16.1, 20.3] % ; Omega3 = 0.465 [0.186, 1.116] g/100g ; Selenium = 40.8 [7.8, 126.2] μg/100g ; VitaminA = 3.72 [1.14, 11.97] μg/100g ; Zinc = 0.61 [0.29, 1.56] mg/100g (wet weight);