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) >
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: Lesueur.
Environment: milieu / climate zone / depth range / distribution range
生態學
海洋; 半鹹淡水 底中水層性; 深度上下限 0 - 100 m (Ref. 57911), usually 1 - 10 m. ; 43°N - 42°S, 97°W - 33°W
Western Atlantic: continental waters from Cape Cod to southeastern Florida (?) in the USA; also southern Brazil to Argentina (Ref. 58839). Reported (but not known for certain) from Gulf of Mexico, Florida and Caribbean islands, and northern South America. Often confused with Myliobatis goodei (Ref. 3173).
Length at first maturity / 大小 / 重量 / 年齡
Maturity: Lm 65.0, range 60 - 70 cm
Max length : 129 cm WD 雄魚/尚未辨別雌雄; (Ref. 49746); common length : 70.0 cm WD 雄魚/尚未辨別雌雄; (Ref. 5217)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
Disk broad with long sharply pointed wings and projecting snout. Tail very long, Few middorsal spines on disk in adults (Ref. 7251). Greyish, reddish chocolate or dusky brown above. Lower surface either pure white or whitish. Teeth green (Ref. 6902).
Found frequently in coastal waters to 10 m depth, mainly in shallow estuaries. Capable of traveling long distances, occasionally leaps out of the water. Swims in midwater. Cruises slowly over the bottom, rooting out bivalves with its beak and wings when feeding (Ref. 7251). Ovoviviparous (Ref. 50449).
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).
Robins, C.R. and G.C. Ray, 1986. A field guide to Atlantic coast fishes of North America. Houghton Mifflin Company, Boston, U.S.A. 354 p. (Ref. 7251)
人類使用
漁業: 低經濟
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Estimates based on models
Preferred temperature (Ref.
123201): 14.2 - 28.1, mean 24.2 °C (based on 594 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00123 - 0.01235), b=3.08 (2.82 - 3.34), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.4 ±0.0 se; based on diet studies.
回復力 (Ref.
120179): 非常低的, 最小族群倍增時間超過14 年 (Fec=4-8).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (83 of 100).
Nutrients (Ref.
124155): Calcium = 17.7 [3.0, 78.8] mg/100g; Iron = 0.619 [0.159, 1.673] mg/100g; Protein = 21.5 [16.5, 26.6] %; Omega3 = 0.259 [0.074, 0.765] g/100g; Selenium = 23.1 [6.7, 60.5] μg/100g; VitaminA = 10.5 [4.4, 24.4] μg/100g; Zinc = 0.737 [0.363, 1.334] mg/100g (wet weight);