Guinea country information

Common names: [No common name]
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Museum: ISH 141-142/62. Conakry, ISH 183/63. Dubreka, ISH 295/59 (Ref. 26277).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/gv.html
National Fisheries Authority: http://www.fis-net.com/guinea
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

Классификация / Names народные названия | синонимы | Catalog of Fishes(род, виды) | ITIS | CoL | WoRMS | Cloffa

Пластиножаберные (акулы и скаты) (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 экология

морской; солоноватоводный демерсальный; пределы глубины ? - 60 m (Ref. 114953). Tropical

распространение страны | регионы FAO | Ecosystems | места находок | Point map | интродукции | 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).

Size / Вес / Возраст

Maturity: L_m ? range ? - ? cm
Max length : 30.0 cm WD самец/пол неопределен; (Ref. 81259); наибольший вес (опубликованные данные): 1.0 kg (Ref. 81259)

Краткое описание определительные ключи | морфология | морфометрия

позвонки: 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 | размножение | Spawnings | Egg(s) | Fecundities | личинки

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).

Основная ссылка Upload your references | ссылки | координатор : McEachran, John | соавторы

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)

Статус Красного Списка МСОП (Ref. 130435)

Близок к исчезновению (NT) (A2d); Date assessed: 04 August 2020

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Угроза для людей

Harmless

Использование человеком

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дополнительная информация

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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).

Trophic level (Ref. 69278): 3.9 ±0.13 se; based on food items.

устойчивость к внешним воздействиям (Ref. 120179): низкий, минимальное время удвоения популяции 4.5-14 лет (Assuming fecundity<100).

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

Fontitrygon margaritella (Compagno & Roberts, 1984)