أشلاق (القروش و الشفانين) (sharks and rays) >
Myliobatiformes (Stingrays) >
Dasyatidae (Stingrays) > Urogymninae
Eponymy: These are not eponyms but relate to the meanings of ‘margarita’; pearl and daisy. The dragonfish was so-named due to having a “pearl-colored spot above the maxilla”. (Ref. 128868), visit book page.
More on author: Günther.
Issue
Distribution will be corrected.
Environment: milieu / climate zone / depth range / distribution range
البيئة
بحري; مياه مخلوطة القاع; نطاق العمق 1 - 60 m (Ref. 4438). Tropical; 21°N - 17°S
Eastern Central Atlantic: Senegal to Congo (Ref. 114953).
الحجم / وزن / العمر
Maturity: Lm ? range ? - ? cm
Max length : 100.0 cm WD ذكر/ مختلط الجنس; (Ref. 3170); common length : 60.0 cm WD ذكر/ مختلط الجنس; (Ref. 26999); أعلا وزن تم نشرة: 20.0 kg (Ref. 81259)
فقرات: 130. Diagnosis: A large Dasyatis species most closely related to the much smaller Dasyatis margaritella and to the extremely flat D. garouaensis (Ref. 26277). Pearl spines always present and very large; denticles on dorsal surface of disc smooth, restricted to middle portion (Ref. 26277).
Dasyatis margarita is a coastal marine species, entering lagoons, shallow bays and estuaries (Ref. 3497, 81259). Feeds on shrimps, crabs, bivalves and annelids (Ref. 28587). Ovoviviparous (Ref. 50449).
Life cycle and mating behavior
النضج | التكاثر | وضع البيض | بيض | الخصوبة | Larvae
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).
Capapé, C. and M. Desoutter, 1990. Dasyatidae. p. 59-63. 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. 4438)
IUCN Red List Status (Ref. 130435: Version 2024-1)
استخدامات بشرية
مصائد: تجاري
أدوات
تقارير خاصة
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مصادر علي الأنترنت
Estimates based on models
Preferred temperature (Ref.
123201): 23 - 28, mean 26.5 °C (based on 76 cells).
Phylogenetic diversity index (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).
مستوى غذائي (Ref.
69278): 3.4 ±0.50 se; based on food items.
المرونه (Ref.
120179): منخفض, الحد الزمني الأدني لتضاعف عدد أفراد المجتمع 4.5-14 سنة (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
Nutrients (Ref.
124155): Calcium = 34.7 [8.3, 159.9] mg/100g; Iron = 0.765 [0.192, 2.007] mg/100g; Protein = 21.9 [19.0, 24.9] %; Omega3 = 0.174 [0.049, 0.512] g/100g; Selenium = 41.1 [11.0, 113.3] μg/100g; VitaminA = 13.3 [5.9, 29.3] μg/100g; Zinc = 1.1 [0.5, 2.0] mg/100g (wet weight);
