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Beryx decadactylus  Cuvier, 1829

Alfonsino
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Native range
This map was computer-generated and has not yet been reviewed.
Beryx decadactylus   AquaMaps   Data sources: GBIF OBIS
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Image of Beryx decadactylus (Alfonsino)
Beryx decadactylus
Female picture by Cambraia Duarte, P.M.N. (c)ImagDOP

Classification / Names Noms communs | Synonymes | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinoptérygiens (poissons à nageoires rayonnées) > Beryciformes (Sawbellies) > Berycidae (Alfonsinos)
Etymology: Beryx: Greek, beryx or berys = a name of a fish. Cuvier & Valenciennes (1829:221) precise that the name was used by Gesner from Varinus, but with no indication whatsoever helping identifying any species. After D'Arcy Wentworth Thompson (A glossary of Greek fishes, 1947), the name actually seems to come originally from Hesychius, but perhaps the name was not originally a fish name. Thompson compares it to meryx (ruminant), applied on skaros (Scarus), so it may have been applied on a parrot fish referring to its browsing/grazing behavior described by Aristoteles and followers..   More on author: Cuvier.

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

; marin bathydémersal; profondeur 110 - 1000 m (Ref. 58302), usually 200 - 400 m (Ref. 35388).   Deep-water; 70°N - 48°S, 180°W - 180°E

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

Worldwide in temperate and tropical latitudes, except the eastern Pacific. Eastern Atlantic: Greenland, Iceland, and Norway to Western Sahara and South Africa, including western Mediterranean. Western Atlantic: south to Brazil. Also found in Argentine (Ref. 2806). Indo-Pacific: East Africa (including the Madascar Ridge and Saya de Malha Bank, Ref. 33390) to Japan, Australia, and New Zealand (Ref. 5755). The limited number of records in the western Pacific is doubtless the result of limited fishing effort below 200 m (Ref. 9833).

Taille / Poids / Âge

Maturity: Lm ?  range ? - ? cm
Max length : 100.0 cm TL mâle / non sexé; (Ref. 26340); common length : 35.0 cm TL mâle / non sexé; (Ref. 9833); poids max. publié: 2.5 kg (Ref. 9833)

Description synthétique Morphologie | Morphométrie

Épines dorsales (Total): 4; Rayons mous dorsaux (Total): 18-20; Épines anales 4; Rayons mous anaux: 25 - 30. Body deep, compressed and has a large eye. Top of head, iris, back and all fins bright blood red. Orbital bones, cheeks and opercular bones shiny white. Breast shiny yellowish white. Body silvery with thin lengthwise lines (Ref. 37108).

Biologie     Glossaire (ex. epibenthic)

Found in ca. 500 m on mud or sandy mud bottom (Ref. 11230). Occurs on the continental slope; adults demersal, young pelagic (Ref. 9563). Feeds on crustaceans, small fishes and cephalopods (Ref. 3321). A 35 cm SL specimen was found in the stomach of Latimeria (Ref. 58472). Young have heavy spines on the head (Ref. 35388).

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

Référence principale Upload your references | Références | Coordinateur | Collaborateurs

Maul, G.E., 1990. Berycidae. p. 626. In J.C. Quero, J.C. Hureau, C. Karrer, A. Post and L. Saldanha (eds.) Check-list of the fishes of the eastern tropical Atlantic (CLOFETA). JNICT, Lisbon; SEI, Paris; and UNESCO, Paris. Vol. 2. (Ref. 7413)

Statut dans la liste rouge de l'IUCN (Ref. 115185)

CITES (Ref. 115941)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Menace pour l'homme

  Harmless




Utilisations par l'homme

Pêcheries: commercial
FAO(pêcheries: production; publication : search) | FishSource | Sea Around Us

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Sources Internet

Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | 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 | SeaLifeBase | Arbre de Vie | Wikipedia(aller à, chercher) | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates of some properties based on models

Preferred temperature (Ref. 115969): 4.5 - 18.3, mean 11.2 (based on 1031 cells).
Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6260   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01445 (0.00868 - 0.02407), b=3.08 (2.93 - 3.23), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Niveau trophique (Ref. 69278):  4.1   ±0.76 se; Based on food items.
Résilience (Ref. 69278):  Faible, temps minimum de doublement de population : 4,5 à 14 années (K = 0.11-0.16; tmax >11).
Vulnérabilité (Ref. 59153):  High to very high vulnerability (72 of 100) .
Catégorie de prix (Ref. 80766):   Medium.