分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Elasmobranchii
板鰓亞綱 (鯊魚與魟魚) (sharks and rays) >
Rhinopristiformes (Shovelnose rays)
鰩目 (Shovelnose rays) >
Rhinobatidae (Guitarfishes)
琵琶鱝科 (Guitarfishes)
Etymology: Rhinobatos: Greek, rhinos = nose + Greek, batis, -idos = a ray (Raja sp.) (Ref. 45335); nudidorsalis: Name from Latin 'nudus' meaning bare or naked and 'dorsum' for back, referring to its smooth, denticle-free upper surface..
More on authors: Last, Compagno & Nakaya.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 居於水底的; 深度上下限 ? - 125 m (Ref. 55722). 熱帶
Central Indian Ocean: Mascarene Ridge.
印度洋中部: 瑪斯科林海脊。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 50.1 cm TL 雄魚/尚未辨別雌雄; (Ref. 55722)
簡短描述
型態特徵 | 形態測量圖
This species is distinguished by the following characters: no thorns on upper surface of the disc, with tail and unpaired fins almost entirely naked; a small, elongate to oval-shaped denticle patch across a naked upper caudal peduncle and upper caudal-fin lobe; a wedge-shaped disc; moderately large orbit, exceeding 4% total length (TL); oblique nostrils, length 1.7 times internarial distance; anterior nasal flaps penetrating well into internarial space, but not almost united; posterior nasal flaps broad; ridges of rostral cartilages well separated dorsally and almost parallel; prebranchial sensory pore patch narrow, extending to first gill slit; postscapular sensory canal long with lateral pores, not grooved, extending almost to pectoral-fin insertions; low dorsal fins; pelvic-fin inner margin distinctly longer than its base; interdorsal distance less than 2.5 times first dorsal-fin base; 2 spiracular folds, outer is much larger than the inner one; caudal fin small with dorsal margin about 1.8 times preventral margin; 172 total vertebral centra; dorsal disc plain colored (Ref. 55722).
這種被藉著下列的特徵區別: 沒有在體盤, 尾部與不成對的鰭上表皮上的刺幾乎完全裸露; 小,越過一個裸露的上尾部的梗與上尾部-鰭葉對橢圓形的細齒小區塊延長; 一個楔形的體盤; 普通大的眼窩, 超過 4% 全長 (TL); 斜的鼻孔, 倍 internarial 距離的長度 1.7; 前鼻瓣進入鼻孔間隙之內相當深入, 但是不是幾乎聯合; 後鼻蓋寬的; 嘴軟骨組織的脊背面分得很開與幾乎平行; 前鰓感覺小孔小區塊狹窄的, 第一個延伸至鰓縫; postscapular 知覺管長的，側面的孔, 沒有溝槽,幾乎延伸到胸鰭嵌入; 低的背鰭; 腹鰭內緣明顯長度超過它的基底; 間背片距離少於 2.5 倍第一背鰭鰭基底; 2 噴水孔摺層, 外部的是比一個內部的大很多; 尾鰭小且有上緣大約 1.8 倍 preventral 邊緣; 172 總計椎骨的中心; 背部的體盤單色的.(參考文獻 55722)
Offshore on insular shelves of the Central Indian Ocean, distribution probably restricted (Ref. 114953). Maximum size is actually unknown, presumably a small- to moderate-size species given that the half-meter holotype is sexually mature (Ref. 55722). Biology is unknown, more specimens needed (Ref. 114953).
最大體長實際上未知, 可能給一半-公尺 holotype 是性成熟的一個小到中等-大小種.(參考文獻, 55722)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
印度洋中部: 瑪斯科林海脊。
Last, P.R., L.J.V. Compagno and K. Nakaya, 2004. Rhinobatos nudidorsalis, a new species of shovelnose ray (Batoidea: Rhinobatidae) from the Mascarene Ridge, central Indian Ocean. Ichthyol. Res. 51:153-158. (Ref. 55722)
人類使用
更多資訊
俗名同種異名新陳代謝捕食者生態毒物學繁殖成熟度產卵場產卵群集孕卵數卵卵發育
年龄/大小成長長度-重量長度-長度長度-頻率形態測量圖型態特徵仔魚稚魚動力學入添量豐度BRUVS
參考文獻養殖養殖資訊品種遺傳學Electrophoreses遺傳率疾病加工NutrientsMass conversion
合作者照片Stamps, Coins Misc.聲音神經毒速度泳型鰓區Otoliths腦重體重比眼睛色素
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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=0.00295 (0.00151 - 0.00578), b=3.13 (2.96 - 3.30), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.6 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 低的, 最小族群倍增時間4.5 - 14 年 (Preliminary low fecundity).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (40 of 100).
