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Bathyraja aguja (Kendall & Radcliffe, 1912)

Aguja skate
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drawing shows typical species in Arhynchobatidae.

分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa

板鰓亜鋼(サメとエイ類) (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 生態学

海 深海魚; 深さの範囲 650 - 980 m (Ref. 127873). Deep-water

分布 国々 | 国連食糧農業機関の区域 | エコシステム | 事件 | Point map | 導入 | Faunafri

Southeast Pacific: Peru.

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 76.0 cm TL オス/雌雄の選別がない; (Ref. 127873)

簡単な記述 検索表 | 形態学 | 形態計測学

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).

生物学     用語集 (例 epibenthic)

Oviparous (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

Life cycle and mating behavior Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). Eggs have horn-like projections on the shell (Ref. 205).

主な参考文献 Upload your references | 参考文献 | コーディネーター : McEachran, John | 協力者

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のレッドリストの状況は (Ref. 130435)

  軽度懸念 (LC) ; Date assessed: 06 February 2019

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

  Harmless





Human uses

FAO - Publication: search | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 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).
栄養段階 (Ref. 69278):  3.9   ±0.7 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  低い, ４．５年～１４年の倍増期間の最小個体群 (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  Moderate to high vulnerability (50 of 100).