(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); aguja: Named for its type locality, off Point Aguja, Peru..
Environment: milieu / climate zone / depth range / distribution range
بوم شناسي
دريايي موجوداتی که در اعماق زیر 200 متر زندگی و تغذیه می کنند; تغييرات عمق 650 - 980 m (Ref. 127873). Deep-water
Southeast Pacific: Peru.
Size / Weight / سن
Maturity: Lm ? range ? - ? cm
Max length : 76.0 cm TL جنس نر / بدون خواص جنسي; (Ref. 127873)
توصيف مختصر
كليدهاي شناسايي | ريخت شناسي | ريخت ستجي بوسيله انداره گيري
This species have two symmetrically arranged, large, white spots on the dorsal surface at the pectoral-fin bases and symmetrically arranged white spots along the disc margins and this pattern is consistent at all sizes from small to at least 76.0 cm TL in adult males; it has a uniformly colored ventral surface without spots or patterning; anterior disc margin distinctly undulating; preorbital length times orbital length 3.70; preorbital length times interorbital length 2.81; interorbital space times orbit length 1.30; orbital length times spiracle length 1.65; pre-oral length times internarial length 2.12; the dorsal disc surface with a median row of thorns originating from behind shoulder girdle on disc; thorns regularly arranged; median thorns 30-33; interdorsal thorn 1-2; the dermal denticles on the dorsal disc surface mostly smooth except for small patches of widely spaced dermal denticles on snout, between orbits, and tail; teeth arranged in quincunx; predorsal tail vertebrae 62-66; pectoral-fin radial count 80-83 (Ref. 127873).
Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
Life cycle and mating behavior
Maturities | تولید مثل | Spawnings | Egg(s) | Fecundities | توزاد ( لارو)
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).
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)
وضعيت در فهرست قرمز IUCN (Ref. 130435)
خطر برای انسان ها
Harmless
استفاده انسانی
ابزارها
گزارش های ويژه
بارگيری XML
منابع اينترنتي
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00513 (0.00253 - 0.01042), b=3.12 (2.95 - 3.29), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
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 (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (50 of 100).
