Classification / Names Nomi Comuni | Sinonimi | Catalog of Fishes(Genere, Specie) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchi (squali e razze) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: Raja: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).
Eponymy: These species are named after the research vessel ‘Walther Herwig’, from which all the holotypes were caught. The vessel was named after Walther Herwig (1838–1912), who is regarded as the founder of German fisheries science. (Ref. 128868), visit book page.

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

marino demersale; distribuzione batimetrica 55 - 102 m (Ref. 4426). Tropical; 17°N - 15°N

Distribuzione Stati | Aree FAO | Ecosystems | Presenze | Point map | Introduzioni | Faunafri

Eastern Central Atlantic: endemic around Cape Verde.

Size / Peso / Age

Maturity: L_m ? range ? - ? cm
Max length : 50.0 cm TL maschio/sesso non determinato; (Ref. 4426)

Found in shelf waters (Ref. 4426). Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

Life cycle and mating behavior Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).

Main reference Upload your references | Bibliografia | Coordinatore : McEachran, John | Collaboratori

McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)

IUCN Red List Status (Ref. 130435: Version 2024-2)

Data deficient (DD) ; Date assessed: 04 August 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO - Publication: search | FishSource |

Informazioni ulteriori

Trophic ecology
Prede
Alimentazione
Consumo di cibo
Food rations
Predatori

Ecology
Ecologia

Population dynamics
Growth parameters
Max. ages / sizes
Length-weight rel.
Length-length rel.
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Life cycle
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Maturità
Maturity/Gills rel.
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Dinamica popolazioni larvali

Distribution
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Anatomy
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Genetics
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Fonti Internet

Estimates based on models

Preferred temperature (Ref. 123201): 13.6 - 15.6, mean 14.2 °C (based on 9 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00263 (0.00118 - 0.00585), b=3.26 (3.09 - 3.43), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245).

Trophic level (Ref. 69278): 3.6 ±0.6 se; based on size and trophs of closest relatives

Resilienza (Ref. 120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (40 of 100).

Raja herwigi Krefft, 1965