Cameroon country information

Common names: [No common name]
Occurrence: misidentification
Salinity: brackish
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: live export: yes;
Comments: Misidentification of Gymnura sereti in Ref. 4439 (McEachran & Seret, 1990) (Ref. 116399).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/cm.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Yokota, L. and M.R. de Carvalho, 2017
National Database:

Common names from other countries

Raie-papillon glabre, Skeete, Raya mariposa menor, ... more

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Elasmobranchii (haaien en roggen) (sharks and rays) > Myliobatiformes (Stingrays) > Gymnuridae (Butterfly rays)
Etymology: Gymnura: Greek, gymnos = naked + Greek, oura = tail (Ref. 45335).
More on authors: Bloch & Schneider.

Issue
Species complex include Gymnura lessae and Gymnura sereti; distribution of and both species were included for Gymnura micrura. Distribution will be corrected.

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

marien; brak water demersaal; diepte ? - 55 m (Ref. 27549). Deep-water

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Southwestern Atlantic: Venezuela, including Trinidad and Tobago, to Brazil (Rio de Janeiro).

Lengte bij maturiteit / Grootte / Gewicht / Leeftijd

Maturity: L_m 35.0, range 34 - 50 cm
Max length : 137 cm WD mannelijk / geslacht onbekend; (Ref. 4439); common length : 90.0 cm WD mannelijk / geslacht onbekend; (Ref. 5217); max. gepubliceerd gewicht: 0.00 g

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Broad, diamond-shaped ray with a very short tail lacking a dorsal spine (Ref. 26938). Snout protruding. Front edges of disk concave. Tail with low dorsal and ventral finfolds and 3 - 4 dark crossbars (Ref. 7251). Upper surface gray, brown, light green or purple with round spots. Lower surface white (Ref. 6902).

Prefers neritic waters of the continental shelf and usually found on soft bottoms. May enter brackish estuaries or hyper-saline lagoons (Ref. 5217). Feeds on fish and shrimps (Ref. 28587); other crustaceans and clams (Ref. 27549). Ovoviviparous (Ref. 50449). Generally marketed salted (Ref. 5217).

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). Distinct pairing with embrace (Ref. 205).

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

Yokota, L. and M.R. de Carvalho, 2017. Taxonomic and morphological revision of butterfly rays of Gymnura micrura (Bloch & Schneider, 1801) species complex, with the description of two new species (Myliobatiformes: Gymnuridae). Zootaxa 4332(1):1-74. (Ref. 116399)

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

Gevoelig (NT) (A2d); Date assessed: 19 September 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

Harmless

Gebruik door de mens

Visserij: van minder commercieel belang

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Estimates based on models

Preferred temperature (Ref. 115969): 21.8 - 27.9, mean 25 (based on 544 cells).

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

Bayesian length-weight: a=0.00513 (0.00312 - 0.00843), b=3.10 (2.95 - 3.25), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).

Trofisch niveau (Ref. 69278): 3.6 ±0.53 se; based on food items.

Weerstandsvermogen (Ref. 120179): Zeer laag, minimale populatieverdubbelingstijd meer dan 14 jaar (Fec=3).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (51 of 100).

Prijsklasse (Ref. 80766): Medium.

Gymnura micrura (Bloch & Schneider, 1801)