Rajella ravidula, Smoothback skate : fisheries

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相关物种
- 物种在
  Rajella
- 物种在
  Rajidae
- - 分类 -
- Rajidae
- Rajiformes
- Elasmobranchii
- Chordata
- Animalia

Rajella ravidula (Hulley, 1970)

Smoothback skate

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Native range | All suitable habitat | Point map | Year 2050

This map was computer-generated and has not yet been reviewed.

Rajella ravidula AquaMaps Data sources: GBIF OBIS

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谷歌图片

Image of Rajella ravidula (Smoothback skate)

No image available for this species;
drawing shows typical species in Rajidae.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鳃亚纲 (鲨鱼与鱼) (sharks and rays) > Rajiformes (Skates and rays) > Rajidae (Skates)
Etymology: Rajella: Latin, raja, -ae = a sting ray (Raja sp.) (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range 生态学

海洋深海底的; 深度上下限 496 - 1477 m (Ref. 106604). 深水域

分布国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Southeast Atlantic: known only from the three type specimens collected from off the west coast of South Africa and one record from off Morocco.
東南大西洋: 只有三個模式標本在南非的西岸外海採集與摩洛哥外海有一個紀錄。

大小 / 重量 / 年龄

Maturity: L_m ? range ? - ? cm
Max length : 79.2 cm TL 雄鱼/尚未辨别雌雄; (Ref. 106604)

简单描述检索表 | 型态特徵 | 形态测量图

Long snout, small eyes, and a thick disc; tail about as long as body; moderate-sized conspicuous light thorns in 2 prominent rows from shoulders to 1st dorsal fin, no or few mid-dorsal thorns, and no thorns on snout (Ref. 5578). Medium grey to purplish-brown dorsally, white ventrally but dusky on disc margins, around vent and on underside of tail (Ref. 5578).
长的吻又小的眼 , 与一个厚的体盘; 尾部大约与身体一样长; 中等大小的显着淡刺从肩到第一背鳍形成 2 列突出的列, 在吻上没有或很少背部中央刺 , 与没有刺.(参考文献 5578) 中等的灰色到紫褐色的背面, 腹侧白色的但是暗色的在体盘边缘上, 排泄孔周围与在尾巴下上.(参考文献 5578)

Inhabits the upper slope (Ref. 5578). Minimum depth reported taken from Ref. 5578. Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

栖息于上层斜坡。 (参考文献 5578) 最小深度报告取自参考文献 5578. 卵生的.(参考文献 50449) 卵在贝壳上有像触角一样的突出。 (参考文献 205)

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).東南大西洋: 只有三個模式標本在南非的西岸外海採集與摩洛哥外海有一個紀錄。

主要参考文献 Upload your references | 参考文献 | 合作者 : McEachran, John | 合作者

McEachran, J.D. and K.A. Dunn, 1998. Phylogenetic analysis of skates, a morphologically conservative clade of elasmobranchs (Chondrichthyes: Rajidae). Copeia 1998(2):271-290. (Ref. 27314)

世界自然保护联盟红皮书 (Ref. 130435: Version 2024-2)

最不相关 (LC) ; Date assessed: 24 April 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

对人类的威胁

无害处的

人类利用

渔业:

FAO - Publication: search | FishSource |

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Estimates based on models

Preferred temperature (Ref. 123201): 3.8 - 7.9, mean 6 °C (based on 59 cells).

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.00302 (0.00141 - 0.00645), b=3.24 (3.07 - 3.41), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

营养阶层 (Ref. 69278): 3.7 ±0.5 se; based on size and trophs of closest relatives

回复力 (Ref. 120179): 低的, 最小族群倍增时间4.5 - 14 年 (Fec assumed to be <100).

Fishing Vulnerability (Ref. 59153): Moderate to high vulnerability (52 of 100).

价格分类 (Ref. 80766): Medium.

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