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); sainsburyi: Named for Dr. Keith Sainsbury.
Eponymy: Dr Keith John Sainsbury (d: 1952) is a marine ecologist and mathematical modeler with a research focus on the assessment, ecology, economics, exploitation and conservation of marine resources and ecosystems. [...] (Ref. 128868), visit book page.
More on author: Last.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 底中水層性; 深度上下限 66 - 200 m (Ref. 58070), usually ? - 150 m (Ref. 58070). 熱帶; 5°S - 21°S, 114°E - 135°E (Ref. 114953)
Eastern Indian Ocean and Western Central Pacific: Western Australia to Papua New Guinea
東印度洋: 西澳大利亞。
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 59.5 cm TL 雄魚/尚未辨別雌雄; (Ref. 58070)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
This species is distinguished by the following characters: wedge-shaped disc, its dorsal surface scaled but no thorns; snout length 2.5-2.6 times interspiracular distance; orbit moderately large, diameter 1.6-1.9 times spiracle length; nostrils oblique, length 1.4-1.6 times internarial distance; anterior nasal-flaps inserted well into internarial space, but never almost united near ventral midline; posterior nasal flaps broad; ridges of rostral cartilage well-separated dorsally and almost parallel; prebranchial sensory-pore patch narrow, extending to first gill slit; distance between first gill slits 1.3-1.4 times distance between fifth gill slits; distance between fifth gill slits 2.5-2.9 times in ventral head length; postscapular sensory canal long, not grooved, extending more than three-quarters distance to pectoral-fin insertions; moderately tall dorsal-fins; pelvic-fin inner margin distinctly longer than its base in mature males, shorter than base in females; interdorsal distance more than 2.5 times first dorsal-fin base; outer spiracular fold distinctly larger than inner fold; dorsal margin of caudal fin about 2.0-2.2 times preventral margin; 162-171 post-synarcual vertebral centra; about 50 nasal lamellae; dorsal disc plain brownish or with faint dusky blotches or fine dark spots (Ref. 58070).
這種被藉著下列的特徵區別: 楔形的體盤 , 它的背面覆有鱗片的但是沒有刺; 倍呼吸孔間的距離吻長度 2.5-2.6; 眼窩普通大的, 倍呼吸孔長度的直徑 1.6-1.9; 鼻孔斜角, 倍 internarial 距離的長度 1.4-1.6; 插入的前鼻瓣相當深入鼻孔間隙內, 但是從不幾乎在腹的中線附近聯合了; 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; 第一個鰓縫之間的距離 1.3-1.4 倍於第五個鰓縫之間的距離; 第五個鰓縫 2.5-2.9 倍頭部下面長度之間的距離; postscapular 知覺管長的, 沒有溝槽, 把超過四分之三距離延伸到胸鰭嵌入; 一般高的背鰭; 腹鰭內緣明顯長度超過在成熟的雄性中的它的基底, 在雌性中的短於基底; 倍第一背鰭鰭基底的間背片距離超過 2.5; 外部的噴水孔摺疊明顯大於內部的摺層; 尾鰭的上緣大約 2.0-2.2 倍 preventral 邊緣; 162-171個在 synarcual 之後的椎骨中心; 大約 50個鼻的嗅板; 背部的體盤單色的褐色或有模糊的暗色斑塊或深色細的斑點.(參考文獻 58070)
This species is mostly collected at depths shallower than 150 m. Male individuals mature at 46 cm TL, immature at 37.6 cm TL (Ref. 58070).
這種是在大部份採集到的深度淺於 150 公尺。 雄性個體在 46 公分TL 時成熟, 不成熟的在 37.6 公分TL.(參考文獻 58070)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
東印度洋: 西澳大利亞。
Last, P.R., 2004. Rhinobatos sainsburyi n. sp. and Aptychotrema timorensis n. sp. -- two new shovelnose rays (Batoidea: Rhinobatidae) from the eastern Indian Ocean. Rec. Aust. Mus. 56(2):201-208. (Ref. 58070)
IUCN 瀕危狀態 (Ref. 130435: Version 2024-1)
無危 (LC) ; Date assessed: 12 May 2015
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Estimates based on models
Preferred temperature (Ref.
123201): 20.5 - 26.8, mean 23.9 °C (based on 45 cells).
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): 3.7 ±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 (44 of 100).
