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Dipturus gigas (Ishiyama, 1958)

Giant skate
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Dipturus gigas   AquaMaps   Data sources: GBIF OBIS
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Image of Dipturus gigas (Giant skate)
No image available for this species;
drawing shows typical species in Rajidae.

Japan country information

Common names: Zôkasube
Occurrence: native
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Known from Chôshi to the Kyushu-Palau Ridge (Ref. 559). Occurs in Okinawa Trough (Ref. 13360).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/ja.html
National Fisheries Authority: http://www.maff.go.jp/eindex.html
Occurrences: Occurrences Point map
Main Ref: Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984
National Database:

Common names from other countries

Zôkasube, 巨鳐, Hiid-tiibrai, ... more

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) > Rajidae (Skates)
Etymology: Dipturus: Greek, di = two + Greek, pteryx = fin (Ref. 45335).

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

海 深海魚; 深さの範囲 300 - 1000 m (Ref. 114953).   Deep-water; 19°N - 37°N, 121°E - 142°E (Ref. 114953)

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

Northwest Pacific: Japan, the East China Sea, and the Philippines.

サイズ / 重さ / 年齢

Maturity: Lm ?  range ? - ? cm
Max length : 186 cm TL オス/雌雄の選別がない; (Ref. 114953)

生物学     用語集 (例 epibenthic)

Found on sand-mud bottoms of upper continental and insular slopes (Ref. 41299, Ref. 114953). Feed on invertebrates and bony fishes (Ref. 9908, Ref. 114953). 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 22.0-23.5 cm long and 14.0-14.5 cm wide (Ref. 41249, 41253). A male holotype reaches maturity at 135 cm TL, females at 115 cm TL (Ref. 114953).

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

Oviparous (Ref. 9908). 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 : 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)

  絶滅危惧に近い (NT) (A2d); Date assessed: 28 August 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

人間に対する脅威

Other (Ref. 10311)




Human uses

FAO(Publication : search) | FishSource |

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Estimates based on models

Preferred temperature (Ref. 115969): 3.6 - 5.6, mean 4.6 (based on 132 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00282 (0.00133 - 0.00596), b=3.25 (3.08 - 3.42), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
栄養段階 (Ref. 69278):  4.0   ±0.62 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 (Assuming fecundity<100).
Fishing Vulnerability (Ref. 59153):  Very high vulnerability (90 of 100).