Angola country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments:
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ao.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Stehmann, M., 1990
National Database:

Common names from other countries

Pilohrbet Irvinův, 暗斑犁头鳐, Rejnokovec Irvineův, ... more

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

Elasmobranchii (haaien en roggen) (sharks and rays) > Rhinopristiformes (Shovelnose rays) > Rhinobatidae (Guitarfishes)
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335).
More on author: Norman.

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

marien demersaal; diepte ? - 30 m (Ref. 114953). Tropical; 29°N - 17°S, 19°W - 13°E (Ref. 114953)

Verspreiding Landen | FAO regio's | Ecosystemen | Voorkomen | Point map | Introducties | Faunafri

Eastern Atlantic: Morocco to southern Angola, a record from Namibia needs confirmation.

Grootte / Gewicht / Leeftijd

Maturity: L_m ? range ? - ? cm
Max length : 100.0 cm TL mannelijk / geslacht onbekend; (Ref. 6497); common length : 65.0 cm TL mannelijk / geslacht onbekend; (Ref. 6497)

More or less stationary in inshore coastal waters to moderate depth. Feeds on benthic invertebrates, mainly crustaceans. Common length is 60-66 cm TL. Males mature at ca. 42 cm TL (Ref. 114953). Ovoviviparous. Produces small litters of 1-3 pups (Ref. 114953).

Levenscyclus en paargedrag Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven

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).

Hoofdreferentie Upload your references | Referenties | Coördinator : McEachran, John | Medewerkers

Stehmann, M., 1990. Rhinobatidae. p. 23-27. 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. 1. (Ref. 6497)

Status op de Rode Lijst van het IUCN (Ref. 130435)

Ernstig bedreigd (CR) (A2d); Date assessed: 04 August 2020

CITES (Ref. 128078)

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

FAO(Publication : search) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969): 25.1 - 28, mean 27.3 (based on 202 cells).

Fylogenetische diversiteitsindex (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00295 (0.00151 - 0.00578), b=3.13 (2.96 - 3.30), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.8 ±0.4 se; based on size and trophs of closest relatives

Weerstandsvermogen (Ref. 120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): High vulnerability (60 of 100).

Rhinobatos irvinei Norman, 1931