Lớp phụ Cá sụn (cá mập và cá đuối) (sharks and rays) >
Torpediniformes (Electric rays) >
Narcinidae (Numbfishes)
Etymology: Narcine: Greek, narke = numbness (Ref. 45335); atzi: Named in honor of Dr. James W. Atz, Curator Emeritus of the Department of Ichthyology, of the AMNH, in recognition of his many contributions to different aspects of ichthyology (Ref. 49866).
More on authors: Carvalho & Randall.
Environment: milieu / climate zone / depth range / distribution range
Sinh thái học
Biển gần đáy; Mức độ sâu ? - 27 m (Ref. 49866). Tropical; 25°N - 7°N, 58°E - 95°E (Ref. 114953)
Western Indian Ocean: Gulf of Oman and from both sides of the Bay of Bengal and Andaman Sea.
Bộ gần gũi / Khối lượng (Trọng lượng) / Age
Maturity: Lm ? range ? - ? cm
Max length : 36.0 cm TL con đực/không giới tính; (Ref. 49866)
Short description
Khóa để định loại | Hình thái học | Sinh trắc học
Dorsal coloration composed of numerous small dark brown spots, equal to or smaller than eye diameter, oval disc and tail regions and within spiracular walls, coupled with faint large blotches, fewer in number, on dorsal disc area; first dorsal fin clearly taller, and with a longer base, than second dorsal fin; preorbital snout length not as great as preoral snout length; upper and lower tooth bands subequal in width and broadly circular in shape (Ref. 49866).
A benthic species in shallow coastal waters (Ref. 114953). Minimum depth from Ref. 58018. Maturity size for females at ca. 31 cm TL; birth size at ca. 11 cm TL (Ref. 114953).
Life cycle and mating behavior
Maturities | Sự tái sinh sản | Spawnings | Egg(s) | Fecundities | Ấu trùng
de Carvalho, M.R. and J.E. Randall, 2003. Numbfishes from the Arabian Sea and surrounding gulfs, with the description of a new species from Oman (Chondrichthyes: Torpediniformes: Narcinidae). Ichthyol. Res. 50(1):59-66. (Ref. 49866)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00476 - 0.02897), b=2.88 (2.66 - 3.10), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Mức dinh dưỡng (Ref.
69278): 3.1 ±0.3 se; based on size and trophs of closest relatives
Thích nghi nhanh (Ref.
120179): thấp, thời gian nhân đôi của chủng quần tối thiểu là 4.5 - 14 năm (Assuming fecundity<100).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (26 of 100).
