इलाज़मौबरांकी (शारक और रेज़) (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
पारिस्थितिकी
समुद्री बाथीड़िमरसल; गहराई सीमा 650 - 980 m (Ref. 127873). Deep-water
Southeast Pacific: Peru.
आकार / वज़न / Age
Maturity: Lm ? range ? - ? cm
Max length : 76.0 cm TL पुल्लिंग / अलिंग; (Ref. 127873)
Short description
पहचान कुंजी | आकृति विज्ञान | मौरफोमैटरिक्स
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 | पुनरुत्पत्ति | Spawnings | Egg(s) | Fecundities | लार्वा
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)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
साधन
Special reports
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इंटरनेट स्रोत
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
लौटाव (Ref.
120179): निम्न, न्यूनतम जनसंख्या दुगनी होने का समय 4.5 - 14 वर्ष। (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153): Moderate to high vulnerability (50 of 100).
