Bathyraja arctowskii, Antarctic dark-mouth skate

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Bathyraja arctowskii (Dollo, 1904)

Antarctic dark-mouth skate
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Image of Bathyraja arctowskii (Antarctic dark-mouth skate)
No image available for this species;
drawing shows typical species in Arhynchobatidae.

رده بندی / Names اسامي عام | مترادف | Catalog of Fishes(جنس, گونه ها) | ITIS | CoL | WoRMS | Cloffa

(كوسه ها و سپرماهيان) (sharks and rays) > Rajiformes (Skates and rays) > Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range بوم شناسي

; دريايي نزديك كف زي; تغييرات عمق 0 - 1685 m (Ref. 123566), usually 126 - 810 m (Ref. 123566).   Deep-water

پراكنش كشورها | مناطق سازمان خوار و بار جهاني (FAO) | Ecosystems | ظهور | Point map | معرفي | Faunafri

Southern Ocean: widespread, circumantarctic: Atlantic sector (off the South Shetland, Brabant, and Biscoe Islands to the South-East Weddell Sea); Pacific (Ross Sea); Indian (from Prydz Bay).

Size / Weight / سن

Maturity: Lm ?  range ? - ? cm
Max length : 61.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 123566); 53.5 cm TL (female)

توصيف مختصر ريخت شناسي | ريخت ستجي بوسيله انداره گيري

This species is characterized by the following: usually completely medium to dark grayish pigmented mouth cavity, often dark underside of the nasal curtain from very small juvenile stages onwards; differs from most congeners in Antarctic and Subantarctic waters in the absence of thorns on the dorsal disc. It is further distinguished by the following characters: disc evenly inverse heart-shaped (the disc margins distinctly undulated in adult males, but not or slightly undulated in others), with broadly rounded outer corners and with body length to mid-cloaca shorter than or equal to tail length from mid-cloaca; preorbital snout length 8.1-16.2% TL (depending on ontogenetic stage) and distance between first gill slits 14.2-15.9% TL; orbits are moderately large, horizontal diameter 1.3-1.8 times interorbital width; upper side of the disc and tail entirely rough, prickly with dermal denticles while the underside is smooth; except for alar thorns of mature males, no thorns on disc but only a median row of 19-30 small thorns along tail to first dorsal fin, the thorns become smaller and more widely spaced posteriorly in subadults and adults and are generally wider spaced in large juveniles to adults as compared with small juveniles; bases of low, more or less equal-sized dorsal fins confluent or with short interspace; postdorsal tail section very short, 1.7-5.2% TL, with low epichordal caudal lobe which is confluent with second dorsal fin; opened clasper tip shows all components typical for Bathyraja species, of which most apparent a long and deep pseudosiphon (ps) along outer edge of dorsal lobe, as well as a massive projection (pj) over entire length of the inner ventral lobe; clasper terminal skeleton with distal processes of dorsal marginal cartilage (forming external pseudorhipidion) and ventral marginal cartilage (forming external projection), 3 dorsal terminal cartilages (with dt1 very large and encapsulating terminal skeleton), ventral terminal, and one accessory terminal cartilage; apparent sexual dimorphism in scapulocoracoid, with post-mesocondyle length longer in females than in males. Colouration: dorsal ground color plain dark to medium grayish-brown, often with mostly indistinct scattered pale and dusky spots on disc, the posterior pelvic lobes and on sides of tail, occasionally with transverse white pseudoocellus stripe on inner posterior pectorals; ventral or underside mostly plain white or pale, often with gray marked cloaca and gray spots on belly to gill region, occasionally gray spotted posterior pectoral margins, origin and sides of tail, or tail partly dark; mouth cavity and underside of nasal curtain at least partly, usually completely pigmented medium to dark grayish from very small juvenile stages onwards (Ref. 123566).

زيست شناسي     واژه نامه (بعنوان مثال epibenthic)

Individuals collected deeper than 810 m indicate that the species possibly occurs in greater depths in the Pacific sector, but may also be the result of differing fishery efforts in the respective depths. Most specimens caught deeper than 810 m were adults but were also recorded from shallower depths elsewhere and juveniles in turn were also recorded deeper than 810 m and even below 1000 m (Ref. 123566).

Life cycle and mating behavior بلوغ | تولید مثل | تخم ریزی | تخم ها | Fecundity | توزاد ( لارو)

مآخذ اصلی Upload your references | مراجع | هماهنگ كننده : McEachran, John | همكاران

Stehmann, M.F., S. Weigmann and G.J. Naylor, 2021. First complete description of the dark-mouth skate Raja arctowskii Dollo, 1904 from Antarctic waters, assigned to the genus Bathyraja (Elasmobranchii, Rajiformes, Arhynchobatidae). Mar. Biodiv. 51(1):1-27. (Ref. 123566)

وضعيت در فهرست قرمز IUCN (Ref. 123251)


CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

خطر برای انسان ها

  Harmless





استفاده انسانی

FAO - Publication: search | FishSource |

اطلاعات بيشتر

كشورها
مناطق سازمان خوار و بار جهاني (FAO)
Ecosystems
ظهور
معرفي
Stocks
بوم شناسي
عادت غذايي
اقلام غذايي
مصرف غذايي
سهمیه
اسامي عام
مترادف
سوخت و ساز
شکارچیان
سم شناسي بوم زيستي
تولید مثل
بلوغ
تخم ریزی
Spawning aggregation
Fecundity
تخم ها
نمو تخم
Age/Size
رشد
طول - وزن
طول - طول
نوسانات طولی
ريخت ستجي بوسيله انداره گيري
ريخت شناسي
توزاد ( لارو)
پويايي لاروي
بازسازی
فراواني
BRUVS
مراجع
آبزي پروري
نمايه آبزي پروري
نژادها
ژنتيك
تواتر آلل ها
وارث
بيماري ها
فرآوری
Nutrients
Mass conversion
همكاران
عکس ها
Stamps, Coins Misc.
صداها
سيگواترا
سرعت
نوع شناگری
منطقه آبششي
Otoliths
مغزها
بینایی

ابزارها

گزارش های ويژه

بارگيری XML

منابع اينترنتي

Aquatic Commons | BHL | Cloffa | Websites from users | فيش واچر را ببينيد | CISTI | Catalog of Fishes: جنس, گونه ها | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: ژنوم, نوکلئوتيد | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: برو, جستجو | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic level (Ref. 69278):  3.9   ±0.7 se; based on size and trophs of closest relatives
جهندگی (Ref. 120179):  پايين ، كم, كمينه زمان لازم براي دو برابر شدن جمعيت 5/4 – 14 سال (Preliminary K or Fecundity.).
آسيب پذيری (Ref. 59153):  Moderate to high vulnerability (47 of 100) .