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: More on author: Norman.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋 居於水底的; 深度上下限 0 - 100 m (Ref. 124452), usually ? - 37 m (Ref. 124452). 亞熱帶的; - 32°S
Western Indian Ocean: South Africa, Mozambique, and Tanzania.
西印度洋: 莫三比克南部到南非的川斯卡中部外海.(參考文獻 5578,11228)
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 56.5 cm TL 雄魚/尚未辨別雌雄; (Ref. 124452); 96.0 cm TL (female)
簡短描述
型態特徵 | 形態測量圖
脊椎骨: 200 - 205. This medium-sized species is distinguished by the following set of characters: dorsal surface smooth, no prominent thorns or tubercles, except for slightly enlarged granular denticles partially around orbital rims, and rather regularly distributed along midline from nape to near first dorsal-fin origin, none between dorsal fins and upper caudal fin; snout semi-translucent with elongated bluish spots giving stripe-nosed appearance, numerous small bluish spots covering the snout, pectoral, pelvic, dorsal, and caudal fins but not the central disc, on a sandy brown background with darker brown spots of varying sizes covering the disc, tail, fin bases, and fins, and sometimes giving the caudal peduncle a striped appearance, the outer edges of pectoral- and pelvic-fin margins blue, while lateral tail folds white or striped blue and brown and ventral surface white; nasal lamellae 37-41; upper jaw tooth row count ca. 60-75; post-synarcual centra 187-192; total vertebral segments 200-205; total pectoral skeleton radials 63-70 (Ref. 124452).
一個犁頭鰩具有一個寬又楔形的吻與胸盤。 (參考文獻 5578) 背面褐色的, 有大的在背面與胸鰭上的藍灰色斑點而且在吻上有大的對稱藍灰色條紋; 背面的少數深褐色的斑點; 腹面白色的.(參考文獻 5578)
Found inshore from the surf line to a depth of 100 m (Ref. 5578, 11228). Feeds on bivalves, gastropods, shrimps, crabs and small bony fishes (Ref. 5578). Common length 92-96 cm TL; males and females mature at about 56 cm TL and birth size ca. 25 cm TL (Ref. 114953). Ovoviviparous (Ref. 50449). Flesh esteemed (Ref. 3919).
發現於岸邊從碎浪區到深度 100 公尺了。 (參考文獻 5578,11228) 吃二枚貝，腹足動物，蝦，螃蟹與小的硬骨魚類。 (參考文獻 5578) 卵胎生的.(參考文獻 50449) 肉讚賞。 (參考文獻 3919)
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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). Bears 2 to 4 young (Ref. 5578).西印度洋: 莫三比克南部到南非的川斯卡中部外海.(參考文獻 5578,11228)
Weigmann, S., D.A. Ebert, B. Séret, 2021. Resolution of the Acroteriobatus leucospilus species complex, with a redescription of A. leucospilus (Norman, 1926) and descriptions of two new western Indian Ocean species of Acroteriobatus (Rhinopristiformes, Rhinobatidae). Marine Biodiversity (2021):51:58. (Ref. 124452)
IUCN 瀕危狀態 (Ref. 130435)
瀕危 (EN) (A2d); Date assessed: 25 April 2018
人類使用
漁業: 自給性漁業; 游釣魚種: 是的
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00309 (0.00170 - 0.00561), b=3.10 (2.94 - 3.26), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
營養階層 (Ref.
69278): 3.7 ±0.60 se; based on food items.
回復力 (Ref.
120179): 非常低的, 最小族群倍增時間超過14 年 (Fec=2).
Fishing Vulnerability (Ref.
59153): High vulnerability (58 of 100).
