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Cruriraja parcomaculata (von Bonde & Swart, 1923)

Roughnose legskate
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Native range | All suitable habitat | Point map | Year 2050
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Cruriraja parcomaculata   AquaMaps   Data sources: GBIF OBIS
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Cruriraja parcomaculata
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分類 / Names 共通名の | 類義語 | Catalog of Fishes(部類, ) | ITIS | CoL | WoRMS | Cloffa

板鰓亜鋼(サメとエイ類) (sharks and rays) > Rajiformes (Skates and rays) > Gurgesiellidae (Pygmy skates)
Etymology: Cruriraja: Latin, crur, cruris = pertaining to a leg + Latin, raja = a ray (Raja sp) (Ref. 45335).

Environment: milieu / climate zone / depth range / distribution range 生態学

深海魚; 深さの範囲 150 - 620 m (Ref. 11284). Deep-water; 28°S - 40°S

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

Western Indian Ocean: KwaZulu-Natal, South Africa to Mozambique. Previous records from Namibia to the Eastern Cape Coast of South Africa refer to Cruriraja hulleyi.

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 55.0 cm TL オス/雌雄の選別がない; (Ref. 5578)

簡単な記述 検索表 | 形態学 | 形態計測学

A rough legskate with a pointed snout covered by large conspicuous white thorns that are also found around the eyes, on the shoulders, and in several rows from the nape to the 1st dorsal fin (Ref. 5578). Legskates have pelvic fins separated into a mobile leg-like front lobe, and a rear lobe that may be fused to the tail base (Ref. 5578). Sandy brown above usually with scattered dark brown and whitish spots (very conspicuous in young and becoming obscure in adults; white below (Ref. 5578). Tail with conspicuous dark brown bandings in juveniles (Ref. 5578).

生物学     用語集 (例 epibenthic)

Found on the uppermost slope (Ref. 5578). Feed on small crustaceans, dragonets, squid, polychaete worms and flatworms (Ref. 5578). Oviparous. Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205). Eggs are oblong capsules with stiff pointed horns at the corners deposited in sandy or muddy flats (Ref. 205). Egg capsules are 4.5 cm long and 2.4 cm wide (Ref. 41249). Caught by hake bottom trawlers (Ref. 5578).

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). Distinct pairing with embrace. Young may tend to follow large objects, such as their mother (Ref. 205).

主な参考文献 Upload your references | 参考文献 | コーディネーター | 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: 24 April 2018

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

Preferred temperature (Ref. 123201): 11.7 - 17.9, mean 15.8 °C (based on 5 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5039   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00661 (0.00225 - 0.01943), b=2.95 (2.71 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  3.6   ±0.53 se; based on food items.
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 vulnerability (42 of 100).