分類 / 名前
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
板鰓亜鋼(サメとエイ類) (sharks and rays) >
Myliobatiformes (Stingrays) >
Myliobatidae (Eagle and manta rays)
Etymology: Myliobatis: Greek, mylo = mill + Greek, + Greek, batis,-idos = a ray (Raja sp.) (Ref. 45335).
More on author: Bleeker.
環境：環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
海 底生の; 深さの範囲 0 - 220 m (Ref. 9862). Tropical
Northwest Pacific: Russia, China, South Korea and Japan.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 150 cm TL オス/雌雄の選別がない; (Ref. 9862)
簡単な記述
検索表 | 形態学 | 形態計測学
This small species (attaining about 66.5 cm DW) has the following set of characters: colour of dorsal surfaces yellowish brown, usually with variable, irregular dark blotches; tail with a very weak ventral skin fold; stinging spine(s) are relatively long (longest spine 10.3-18.6% DW); interorbital space is shallowly concave in adult males; anterior margins of pectoral fins moderately convex; cranial fontanelle (visible in dorsal view without dissection) is relatively narrow with mostly straight lateral margins; claspers of adult males 6.6-10.2% DW; predorsal length 66.6-78.8% DW; each jaw with 7 rows of teeth, with a broad median row flanked by three smaller rows on each side; pectoral-fin radials 79-85 (excluding rostral propterygial radials anterior of the eyes); total vertebral centra (including synarcual) 115-124; males mature by 42.9 cm DW (Ref. 132213).
Cross section: flattened.
Found from the intertidal to the uppermost continental slope (Ref. 9862, 11230). A carnivore feeding on benthic animals. Ovoviviparous (Ref. 50449). Males and females ranged in size from 24.5-61.9 and 21.4-65.6 cm DW, respectively. Five males between 42.9 and 61.9 cm DW were found to be mature and a 41.0 cm DW male was adolescent, while 18 males between 24.5 and 32.3 cm DW were immature. A female of 65.6 cm DW was found pregnant. A reported abnormal female specimen was 66.5 cm DW and weighed 5.5 kg. The largest male examined was 61.9 cm DW had a total length of 125.7 cm (Ref. 132213).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
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).
White, W.T., J. Kawauchi, S. Corrigan, E. Rochel and G.J.P. Naylor, 2015. Redescription of the eagle rays Myliobatis hamlyni Ogilby, 1911 and M. tobijei Bleeker, 1854 (Myliobatiformes: Myliobatidae) from the east Indo-West Pacific. Zootaxa 3948(3):521-548. (Ref. 132213)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
脆弱 (VU) (A2d); Date assessed: 27 October 2020
人間の用途
水産業: 少数商業の; ゲームフィッシュ: はい
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
好ましい温度 (参照
123201): 12.8 - 24.7, mean 20.3 °C (based on 176 cells).
系統多様性指数 (参照
82804): PD
50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00124 - 0.01219), b=3.08 (2.83 - 3.33), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
栄養段階 (参照
69278): 3.5 ±0.37 se; based on food items.
回復力 (参照
120179): 低い, ４．５年～１４年の倍増期間の最小個体群 (Fec assumed to be <100).
漁業の脆弱性 (Ref.
59153): Very high vulnerability (90 of 100).
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