Sierra Leone country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Museum: BMNH 1920.8.12.1(Ref. 26277).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/sl.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Compagno, L.J.V. and T.R. Roberts, 1984
National Database:

Common names from other countries

Ebagnalite, Paarlemoerpijlstaartrog, Pärlitera-astelrai, ... more

Classificação / Names Nomes comuns | Sinónimos | Catalog of Fishes(Género, Espécies) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii (tubarões e raias) (sharks and rays) > Myliobatiformes (Stingrays) > Dasyatidae (Stingrays) > Urogymninae
Etymology: margaritella: Named for the smaller size of this stingray and of its pearl (Latin: margarita) spine, as compared to Dasyatis margarita (Ref. 26277).
More on authors: Compagno & Roberts.

Issue
Distribution will be corrected.

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

marinhas; estuarina demersal; intervalo de profundidade ? - 60 m (Ref. 114953). Tropical

Distribuição Países | Áreas FAO | Ecossistemas | Ocorrências | Point map | Introduções | Faunafri

Eastern Central Atlantic: West African coast from Cape Blanc in Mauritania to Angola (Ref. 7397, 81259, 81625, 114953). Often confused with Dasyatis margarita (Günther, 1870) (Ref. 7397).

Tamanho / Peso / Idade

Maturity: L_m ? range ? - ? cm
Max length : 30.0 cm WD macho/indeterminado; (Ref. 81259); peso máx. Publicado: 1.0 kg (Ref. 81259)

Descrição breve Chaves de identificação | Morfologia | Morfometria

Vértebras: 116 - 128. Diagnosis: Dasyatis margaritella is the smallest dasyatid in West Africa (Ref. 26277). It is most similar to Dasyatis margarita, which is larger and has a larger pearl spine, and more numerous pectoral radials, 133-135 vs. 116-127 in D. margaritella (Ref. 26277). It is also similar to D. garouaensis, which has a much flatter disc and a longer snout (Ref. 26277).

Dasyatis margaritella is the most common littoral stingray on the West African coast and it enter lagoons, shallow bays and estuaries (Ref. 7397, 81259). Most likely feeds on small invertebrates (Ref. 114953). Ovoviviparous (Ref. 50449).

Life cycle and mating behavior Maturities | Reprodução | Spawnings | Egg(s) | Fecundities | Larvas

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).

Referência principal Upload your references | Referências | Coordenador : McEachran, John | Colaboradores

Séret, B., 2003. Dasyatidae. p. 81-96. In D. Paugy, C. Lévêque and G.G Teugels (eds.) The fresh and brackish water fishes of West Africa Volume 1. Collection Faune et Flore Tropicales 40. Institut de recherche de développement, Paris, France, Muséum national d'histoire naturelle, Paris, France and Musée royal de l'Afrique Central, Tervuren, Belgium, 457p. (Ref. 81259)

Categoria na Lista Vermelha da IUCN (Ref. 130435)

Quase ameaçada (NT) (A2d); Date assessed: 04 August 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Ameaça para o homem

Harmless

Utilização humana

FAO(Publication : search) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969): 23.7 - 28, mean 26.6 (based on 66 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00832 (0.00366 - 0.01891), b=3.10 (2.90 - 3.30), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Nível Trófico (Ref. 69278): 3.9 ±0.13 se; based on food items.

Resiliência (Ref. 120179): Baixo, tempo mínimo de duplicação da população 4,5 - 14 anos (Assuming fecundity<100).

Fishing Vulnerability (Ref. 59153): Very high vulnerability (90 of 100).

Fontitrygon margaritella (Compagno & Roberts, 1984)