Bathyraja aleutica, Aleutian skate

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Bathyraja aleutica (Gilbert, 1896)

Aleutian 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.
Bathyraja aleutica   AquaMaps   Data sources: GBIF OBIS
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Image of Bathyraja aleutica (Aleutian skate)
Bathyraja aleutica
Picture by Orlov, A.

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) > Rajiformes (Skates and rays) > Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335);  aleutica: Named for its type locality, Aleutian Islands..
More on author: Gilbert.

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

海洋 深海底的; 深度上下限 15 - 1602 m (Ref. 50550). 深水域

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

North Pacific: from the Bering Sea, south to Cape Mendocino, northern California, and far west to northern Japan.
北太平洋: 日本北方到阿留申群島與阿拉斯加州東南方。

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm 122.0, range 112 - 132 cm
Max length : 161 cm TL 雄魚/尚未辨別雌雄; (Ref. 56527); 154.0 cm TL (female); 最大體重: 23.1 kg (Ref. 56527)

簡短描述 型態特徵 | 形態測量圖

This large, rhomboidal skates (1,540 mm TL) have long head length 16.7-24.3% TL) and rounded pectoral apices; interdorsal space is large (1.3-3.1% TL); claspers short and stubby, with tip rounded and not bulbous, with weakly defined pseudosiphon, the dorsal lobe has a short pseudorhipidion, U-shaped cleft, while ventral lobe with a rounded projection; teeth in 34-42 rows on upper jaw, and 32-38 rows on lower jaw; pectoral radials 90; pelvic fins 22; total vertebrae 152; dorsal surface of body with fine prickles, becoming larger on the tail, also with thorns, with males having alar thorns, no malar thorns, middorsal thorns developed and high in number (4-11), nuchal thorns strong (3-5), scapular and tail thorns present, interdorsal thorns weak (1-2). Colouration: dorsal dark brown to grey, dark spots on pectorals, often with ocellus on either pectoral fin, while ventral white, with darker coloration on the snout, gills, disc margins, pelvics, and underside of the tail (Ref. 126515).
在肩胛區域上的成對的刺; 一系列的連續刺從頸背的區域到尾部.(參考文獻 559) 尾部長的, 它的長度等於或長度超過體盤長度.(參考文獻 559) 從吻尖到第 5個鰓裂的距離的吻的長度 1/2 或更多.(參考文獻 559) 圓盤白色的腹面側邊, 與淺灰色的邊緣.(參考文獻 559)

生物學特性     字彙 (例如 epibenthic)

Found in deep waters, on outer continental shelf and upper slope, often over muddy sediments. Reported to feed mainly on benthic crustaceans, including shrimps and crabs, and secondarily on bony fishes (Ref. 126515). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Size at maturity for males 113 cm TL and 125 cm TL for females with males growing to at least 150 cm TL and females grow to about 154 cm TL; reported size at birth is 12-15 cm TL (Ref. 126515). Eggs are deposited in sandy or muddy flats (Ref. 205). Egg capsule measures 120-136 mm long and 73-90 mm wide (Ref. 41249, 41253); golden brown in color, and covered with coarse, striated, and anteriorly-directed prickles, giving it a velvety texture; the cases are with long, curved horns at each corner, with the anterior horns being short and these horns taper and become thin and filamentous at their ends (Ref. 126515).

卵生的。 明顯的成對出現。 幼魚可能傾向跟隨大的個體, 例如他們的母親.(參考文獻 205) 卵為長方形鞘囊具有僵硬的觸角沈積在沙灘或泥灘的角落.(參考文獻 205) 卵鞘有 120-136 mm 長與 73-90 mm 寬的長。 (參考文獻 41249,41253)

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | | 孕卵數 | 仔魚

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).北太平洋: 日本北方到阿留申群島與阿拉斯加州東南方。

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

Knuckey, J.D.S. and D.A. Ebert, 2022. A taxonomic revision of Northeast Pacific softnose skates (Rajiformes: Arhynchobatidae: Bathyraja Ishiyama). Zootaxa 5142(1):1-89. (Ref. 126515)

IUCN 瀕危狀態 (Ref. 130435)

  無危 (LC) ; Date assessed: 25 November 2014

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): 1.3 - 5.1, mean 2.3 °C (based on 239 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00316 (0.00214 - 0.00467), b=3.11 (2.99 - 3.23), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245).
營養階層 (Ref. 69278):  4.1   ±0.76 se; based on food items.
回復力 (Ref. 120179):  低的, 最小族群倍增時間4.5 - 14 年 (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).