分類 / Names
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)
(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
; 海; 汽水性の 底生の漂泳性; 深さの範囲 0 - 100 m (Ref. 57911), usually 1 - 10 m. Subtropical; 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 / サイズ / 重さ / 年齢
Maturity: Lm ?, range 60 - 70 cm
Max length : 100.0 cm WD オス/雌雄の選別がない; (Ref. 57911); common length : 70.0 cm WD オス/雌雄の選別がない; (Ref. 5217)
形態学 | 形態計測学
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).
Life cycle and mating behavior
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).
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)
CITES (Ref. 123416)
Estimates based on models
Preferred temperature (Ref. 115969
): 14.2 - 28.1, mean 24.2 °C (based on 594 cells).
Phylogenetic diversity index (Ref. 82805
= 0.5002 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00380 (0.00118 - 0.01224), b=3.09 (2.83 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
栄養段階 (Ref. 69278
): 3.4 ±0.0 se; based on diet studies.
回復力 (Ref. 120179
): 非常に低い, １４年以上の倍増期間の最小個体群 (Fec=4-8).
弱み (Ref. 59153
): High vulnerability (60 of 100) .
Nutrients (Ref. 124155
): Calcium = 44.3 [6.1, 144.8] mg/100g ; Iron = 1.19 [0.31, 3.38] mg/100g ; Protein = 19.8 [17.3, 22.5] % ; Omega3 = 0.488 [0.142, 1.431] g/100g ; Selenium = 24.9 [5.0, 70.8] μg/100g ; VitaminA = 11.7 [3.9, 34.0] μg/100g ; Zinc = 0.908 [0.444, 2.411] mg/100g (wet weight);