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Myliobatiformes (Stingrays) >
Gymnuridae (Butterfly rays)
Etymology: Gymnura: Greek, gymnos = naked + Greek, oura = tail (Ref. 45335).
Eponymy: Alfred Herbert Crook (d: 1873) was a biologist and Headmaster of Queen’s College, Hong Kong (1925–1930), who also lectured on biology at the Hong Kong College of Medicine. [...] (Ref. 128868), visit book page.
More on author: Fowler.
Lingkungan: lingkungan / zona iklim / kisaran kedalaman / jangkauan distribusi
Ekologi
laut dasar (demersal). Subtropical
Northwest Pacific: known from the type locality, Kowloon, China. Not in Compagno's 1999 checklist (Ref. 35766).
Ukuran / Berat / umur
Kematangan: Lm ?  range ? - ? cm
Ovoviviparous (Ref. 50449). Better reference needed.
Siklus hidup dan perilaku kawin
Kematangan | Reproduksi, perkembang biakan | Pemijahan | telur-telur | Fekunditas | Larva
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).
Eschmeyer, W.N. (ed.), 1999. Catalog of fishes. Updated database version of November 1999. Catalog databases as made available to FishBase in November 1999. (Ref. 33021)
Status IUCN Red List (Ref. 130435: Version 2025-2 (Global))
ancaman kepada manusia
Harmless
penggunaan manusia
Alat, peralatan
laporan khas
muat turun XML
Sumber internet
Estimasi berdasarkan model
Indeks keanekaragaman filogenetik (Acuan 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00851 (0.00397 - 0.01825), b=3.08 (2.88 - 3.28), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
Tingkat Trofik (Acuan 69278) |
3.8 ±0.6 se; based on size and trophs of closest relatives |
Daya lenting (Acuan 120179) |
sangat rendah, Waktu penggandaan populasi minimum lebih dari 14 tahun (Fec assumed to be <10). |
Kerentanan Penangkapan Ikan (Ref. 59153) |
Moderate vulnerability (43 of 100). 🛈 |