ইলাসমোব্রাঙ্কি (হাঙ্গর এবং রে) (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
বাস্তুসংস্থান
সামুদ্রিক; ঈষৎ লোনা তলদেশ বিহারী; গভীরতার পরিসীমা ? - 55 m (Ref. 27549). Deep-water
Southwestern Atlantic: Venezuela, including Trinidad and Tobago, to Brazil (Rio de Janeiro).
Length at first maturity / আকৃতি / ওজন / Age
Maturity: Lm 35.0, range 34 - 50 cm
Max length : 137 cm WD পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 4439); common length : 90.0 cm WD পুরুষ/ লিঙ্গ অনিধর্ারিত ; (Ref. 5217); সবের্াচ্চ প্রকাশিত ওজন : 0.00 g
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).
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).
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)
IUCN Red List Status (Ref. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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ইন্টারনেট সুত্র
Estimates based on models
Preferred temperature (Ref.
123201): 21.8 - 27.9, mean 25 °C (based on 544 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00513 (0.00314 - 0.00839), b=3.10 (2.95 - 3.25), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
ট্রফিক পর্যায়ে (Ref.
69278): 3.6 ±0.53 se; based on food items.
স্থিতিস্থাপক (Ref.
120179): অত্যন্ত কম , সর্বনিম্ন প্রজন দ্বিগুনের সময় ১৪ বৎসর (Fec=3).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (43 of 100).
Nutrients (Ref.
124155): Calcium = 7.1 [1.0, 38.4] mg/100g; Iron = 0.314 [0.067, 0.935] mg/100g; Protein = 21.9 [18.4, 24.9] %; Omega3 = 0.234 [0.058, 0.711] g/100g; Selenium = 8.65 [2.29, 27.32] μg/100g; VitaminA = 6.06 [1.19, 29.85] μg/100g; Zinc = 0.395 [0.196, 0.738] mg/100g (wet weight);
