Hypanus marianae, Brazilian large-eyed stingray

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Hypanus marianae (Gomes, Rosa & Gadig, 2000)

Brazilian large-eyed stingray
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Hypanus marianae   AquaMaps   Data sources: GBIF OBIS
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Image of Hypanus marianae (Brazilian large-eyed stingray)
Hypanus marianae
Picture by Sazima, I.

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(, ) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (sharks and rays) > Myliobatiformes (Stingrays) 鰩目 (Stingrays) > Dasyatidae (Stingrays) 土魟科 (Stingrays) > Dasyatinae
Etymology: marianae: Named for Mariana R. Oliveria, daughter of Otto B.F. Gadig..

Environment: milieu / climate zone / depth range / distribution range 生態學

海洋 居於水底的; 深度上下限 2 - 15 m (Ref. 36974). 熱帶; 0°S - 19°S, 38°W - 45°W (Ref. 36974)

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Southwest Atlantic: along the northeastern Brazilian coast, from the state of Maranhão to southern Bahia.
西南大西洋: 沿著巴西東北部海岸, 到巴伊亞州南部的從馬拉尼昂州。

大小 / 重量 / 年齡

Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm WD 雄魚/尚未辨別雌雄; (Ref. 36974)

簡短描述 型態特徵 | 形態測量圖

This medium-sized species of Dasyatis is distinguished by the following characters: horizontal diameter of eye nearly equal to interorbital width and spiracle length; its tail is relatively short, less than two times disk width, distally filiform, with dorsal and ventral finfolds, ending approximately on same vertical line; height of dorsal finfold 1.5-2 in height of ventral finfold; the dorsal surface of disc is yellowish brown, with dark blotch between spiracles and two pairs of dark scapular and precaudal blotches; margins of disc and pelvic fins are blue dorsally; the ventral surface of disc white, with two symmetrical pairs of dark markings in adults (Ref. 36974).
一個 Dasyatis 的中等大小種幾乎有水平的眼的直徑等於眼間骨寬度與呼吸孔長度。 尾部相當短的, 少於兩倍的圓盤寬度, 末梢部絲狀, 有背部與腹部的被約略在相同的垂直線上終止的鰭褶; 腹鰭褶的高度的背部鰭褶 1.5-2 的高度。 體盤的背面土黃色, 與在呼吸孔與兩對的深色肩胛與尾前椎斑塊之間的黑色斑塊。 背面的體盤邊緣與腹鰭藍色。 體盤的側面白色, 有兩對對稱的深色斑紋當成魚時。

生物學特性     字彙 (例如 epibenthic)

Apparently associated with coral or sandstone reefs of the northeastern Brazilian continental shelf. Two female specimens were collected from the stomach of Rachycentron canadum (Ref. 36974). Juveniles also occurred in sandy beaches and estuaries. Ovoviviparous (Ref. 50449).

顯然地伴隨著珊瑚或巴西東北部大陸棚的沙岩礁了。 稚魚也出現在沙灘與河口。 卵胎生的.(參考文獻 50449)

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 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). Distinct pairing with embrace (Ref. 205). A gravid female aborted one fully formed embryo (Ref. 36974).西南大西洋: 沿著巴西東北部海岸, 到巴伊亞州南部的從馬拉尼昂州。

主要參考資料 Upload your references | 參考文獻 | 合作者 : McEachran, John | 合作者

Gomes, U.L., R.S. Rosa and O.B.F. Gadig, 2000. Dasyatis marianae sp. n.: a new species of stingray (Chondrichthyes: Dasyatidae) from the southwestern Atlantic. Copeia 2000(2):510-515. (Ref. 36974)

IUCN 瀕危狀態 (Ref. 130435)

  瀕危 (EN) (A2cd); Date assessed: 01 July 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





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Estimates based on models

Preferred temperature (Ref. 123201): 27 - 27.9, mean 27.4 °C (based on 44 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00715 - 0.01930), b=3.10 (2.96 - 3.24), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
營養階層 (Ref. 69278):  3.5   ±0.5 se; based on size and trophs of closest relatives
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):  Very high vulnerability (90 of 100).