Issue
Distribution will be corrected.
Environment: milieu / climate zone / depth range / distribution range
Ecologia
; Água doce; estuarina demersal. Tropical
Africa: rivers and lakes in western Africa (Ref. 81259, 81625).
Tamanho / Peso / Idade
Maturity: Lm ? range ? - ? cm
Max length : 120 cm WD macho/indeterminado; (Ref. 81259)
Vértebras: 108 - 122. Diagnosis: Dasyatis ukpam is a very large and thick-bodied freshwater dasyatid (Ref. 26277). Entire dorsal surface of disc covered with stout-spined denticles, smooth in newborn (Ref. 26277). Sting greatly reduced in size or absent (Ref. 26277).
Benthic species mostly in lakes and rives, found more than 240 km upstream from the sea (possibly also coastal). The life history and present status of populations in West Africa is unknown. Type specimens were born after capture of the mother; few specimens exist (Ref. 114953). Ovoviviparous (Ref. 50449).
Ciclo de vida ou comportamento de acasalamento
Maturidade | Reprodução | Desova | Ovos | Fecundidade | 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).
Compagno, L.J.V., 1999. Checklist of living elasmobranchs. p. 471-498. In W.C. Hamlett (ed.) Sharks, skates, and rays: the biology of elasmobranch fishes. Johns Hopkins University Press, Maryland. (Ref. 35766)
Status na Lista Vermelha da UICN (Ref. 130435: Version 2024-2)
Ameaça para os humanos
Harmless
Uso pelos humanos
Pescarias: sem interesse
Ferramentas
Relatórios especiais
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Fontes da internet
Estimates based on models
Índice de diversidade filogenética (Ref.
82804): PD
50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00486 - 0.02155), b=3.06 (2.87 - 3.25), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Nível Trófico (Ref.
69278): 3.7 ±0.3 se; based on size and trophs of closest relatives
Resiliência (Ref.
120179): Muito baixo(a), tempo mínimo de duplicação da população maior que 14 anos (Assuming Fec<10).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
Nutrients (Ref.
124155): Calcium = 31.2 [7.6, 142.6] mg/100g; Iron = 0.748 [0.186, 1.957] mg/100g; Protein = 21.9 [19.1, 25.0] %; Omega3 = 0.173 [0.049, 0.510] g/100g; Selenium = 45 [12, 123] μg/100g; VitaminA = 11.6 [5.2, 25.7] μg/100g; Zinc = 1.02 [0.50, 1.85] mg/100g (wet weight);
