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) >
Rhinidae (Wedgefishes)
Etymology: Rhynchobatus: Greek, rhingchos = snout + Greek, batis, -idos = a sting ray (Raja sp.) (Ref. 45335); immaculatus: Name from Latin 'im' meaning not and 'macula' for spot, mark; based on the lack of a dark pectoral marking (rather than any white spots) which is otherwise present in small individuals of other nominal species of Rhynchobatus..
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋. ; 23°N - 25°N, 120°E - 122°E (Ref. 114953)
分布
國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri
Northwest Pacific: confirmed from Taiwan; probably more widespread.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 99.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 94805)
簡短描述
型態特徵 | 形態測量圖
This medium-sized species is distinguished by the following set of characters: snout is broad, and wedge-shaped; preoral snout 19-21% TL; small eye, its length 4.1-4.5 in preorbital snout; interorbital space 2.6-2.9 in preorbital snout; about 48 tooth rows; no spines from snout; supraorbital spines are small, well differentiated, and extending from preorbit to beyond end of spiracle; predorsal spines are relatively well developed; 2 disjunct rows of 6-9 small scapular spines on each side of the disc; predorsal space 48-49% of total length; origin of the first dorsal fin is well behind origin of pelvic-fin bases; total pectoral-fin radials 65-68; vertebrae with 28-30 monospondylous precaudal centra, 124-131 precaudal free centra, 38-42 diplospondylous caudal (free) centra, 165-170 total free centra, 179-184 total centra (including synarcual centra). Colouration: dark greenish brown dorsally with a few white spots scattered on pectoral disc; no black pectoral marking; prominent row of white spots start just forward of a single white spot (above pelvic-fin origin) and coalescing posteriorly to form a white mid-lateral line on tail; orbital membrane is white with dark bar over eye; no alternating light and dark markings on the interorbital space (Ref. 94805).
A benthic species that was recently discovered and not well known, but apparently lives in shallow water on the continental shelf. Probably feeds on bottom-dwelling crustaceans and fishes (Ref. 114953). Specimens caught are all immature that most probably the maximum length of this medium-size wedgefish could be less than 150 cm TL (Ref. 94805).
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Last, P.R., H.-H. Ho and R.-R. Chen, 2013. A new species of wedgefish, Rhynchobatus immaculatus (Chondrichthyes: Rhynchobatidae), from Taiwan. Zootaxa 3752(1):185-198. (Ref. 94805)
IUCN 瀕危狀態 (Ref. 130435)
極危 (CR) (A2bd); Date assessed: 03 December 2018
人類使用
更多資訊
國家FAO區域生態系發現紀錄簡介Stocks生態學食性食物相食物消耗量定量
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 = 0.5049 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.5 ±0.6 se; based on size and trophs of closest relatives
Fishing Vulnerability (Ref.
59153): High vulnerability (60 of 100).
