ກຸ່ມປາກະດູກອ່ອນ (ເຊັ່ນ: ປາສະຫລາມ, ປາຜາໄລ) (sharks and rays) >
Rajiformes (Skates and rays) >
Arhynchobatidae (Softnose skates)
Etymology: Bathyraja: Greek, bathys = deep + Latin, raja, -ae = a ray (Raja sp) (Ref. 45335); microtrachys: Name from Latin 'micro' meaning small, and 'trachys' meaning spine, referring to the uniform fine prickles covering the dorsal surface.
ສະພາບແວດລ້ອມ: ສະພາບແວດລ້ອມ / ເຂດດິນຟ້າອາກາດ / ລະດັບຄວາມເລິກ / ຂອບເຂດການແຈກຢາຍ
ນິເວດວິທະຍາ
ສັດທະເລ ກ່ຽວກັບ(ຢູ່)ຊັ້ນນ້ຳໃນທະເລທີ່ເໜີອພື້ນດິນ; ລະດັບຄວາມເລິກ 1995 - 3000 m (Ref. 126515), usually 2000 - 3000 m (Ref. 126515). Temperate
Northeastern Pacific: from British Columbia, south to the Gulf of California
ຂະໜາດ / ນ້ຳໜັກ / ອາຍຸ
ການຈະເລີນເຕັມໄວ: Lm ?  range ? - ? cm
Max length : 75.0 cm TL ຕົວຜູ້/ບໍ່ມີເພດ; (Ref. 126515)
ຄຳອະທິບາຍສັ້ນໆ
ຕົວທີ່ໃຊ້ໃນການຈຳແນກຊະນິດ | ສະລີລະວິທະຍາ | ການວັດແທກຮູບຮ່າງລັກສະນະພາຍນອກຂອງດິນ,ສັດ,ປາ…
This moderate sized, rhomboidal skates (91.0 cm TL), with disc length (41.5-51.1% TL), head moderately long (18.3-21.2% TL), internarial distance large (7.3-8.7% TL) is distinguished by the following: claspers short and robust, tip rounded, with very large pseudosiphon and a long, slender pseudorhipidion nearly reaching the tip, V-shaped cleft, no projection; teeth in 23-30 rows on upper jaw and 11-22 rows on lower jaw; pectoral radials 61-74; pelvic fins 14; total vertebrae 130; its dorsal surface evenly covered in fine prickles; thorns on dorsal surface, males with alar thorns, but without malar thorns, middorsal, nuchal, and scapular thorns absent, tail thorns high in number (19-26); interdorsal thorns weak to obsolete (0-1). Colouration: dorsal uniformly brown, usually darker at the margins while ventral is white, brown pectorals and pelvic fins (Ref. 126515).
Cross section: flattened.
This species inhabits perhaps the deepest waters and prefer low temperature, high oxygen environments compared to its congeners. Little is known about the diet of this species, except noted to consume deep-water shrimps. Based on materials examined, size at maturity for males is at least 64-75 cm TL and 60-70 cm TL for females; with reported size at birth to be about 17 cm TL. Egg cases are small (7.9-8.1 cm TL), dark golden brown in colour, coarsely striated with irregular rasp-like denticles, making it rough to the touch. Horns at the corners with the anterior ones robust at base, but flatten towards tips and the tips curve dorsally and back towards the egg case (Ref. 126515).
ວົງຈອນຊີວິດ ແລະພຶດຕິກໍາການຫາຄູ່
ການຈະເລີນເຕັມໄວ | ການສືບພັນ | ການວາງໄຂ່ | ໄຂ່ | ຄວາມດົກຂອງໄຂ່ປາ | ຕົວອ່ອນ
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)
ສະຖານະພາບບັນຊີແດງຂອງ IUCN (Ref. 130435: Version 2025-2 (Global))
ໄພຂົ່ມຂູ່ຕໍ່ມະນຸດ
Harmless
ການນໍາໃຊ້ຂອງມະນຸດ
ການປະມົງ: ທີ່ບໍ່ມີຄວາມສົນໃຈ
ເຄື່ອງມື
ບົດລາຍງານພິເສດ
ດາວໂຫລດ XML
ແຫຼ່ງອີນເຕີເນັດ
ການຄາດຄະເນໂດຍອີງໃສ່ແບບຈໍາລອງ
ດັດຊະນີຄວາມຫຼາກຫຼາຍທາງຊີວະພາບ (ເອກະສານອ້າງອີງ 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00562 (0.00298 - 0.01063), b=3.13 (2.97 - 3.29), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245). |
ຊັ້ນເຂດຮ້ອນ (ເອກະສານອ້າງອີງ 69278) |
3.9 ±0.7 se; based on size and trophs of closest relatives |
ຄວາມຢືດຢຸ່ນ (ເອກະສານອ້າງອີງ 120179) |
ຕຳ່, ປະຊາກອນຕຳ່ສຸດທີ່ໃຊ້ເວລາສອງເທົ່າ 4.5 - 14 ປີ (Preliminary K or Fecundity.). |
ຄວາມສ່ຽງຕໍ່ການຫາປາ (Ref. 59153) |
High vulnerability (60 of 100). 🛈 |