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Squalus japonicus Ishikawa, 1908

Japanese spurdog
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Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Squalus japonicus   AquaMaps   Data sources: GBIF OBIS
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Image of Squalus japonicus (Japanese spurdog)
Squalus japonicus
Female picture by White, W.T.

Malaysia country information

Common names: Yu duri pasir, Yu jereh
Occurrence: questionable
Salinity: marine
Abundance: | Ref:
Importance: | Ref:
Aquaculture: | Ref:
Regulations: | Ref:
Uses: no uses
Comments: Outside distributional range, occurrence needs verification.
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/my.html
National Fisheries Authority:
Occurrences: Occurrences Point map
Main Ref: Mohsin, A.K.M. and M.A. Ambak, 1996
National Database:

Common names from other countries

Aiguillat togari, Galludo japones, قِرش الإسكندر ياباني, ... more

分類 / Names 俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa

Elasmobranchii 板鰓亞綱 (鯊魚與魟魚) (sharks and rays) > Squaliformes (Sleeper and dogfish sharks) 角鯊目 (Sleeper and dogfish sharks) > Squalidae (Dogfish sharks) 棘鮫科 (Dogfish sharks)
Etymology: Squalus: Genus name from Latin 'squalus' meaning shark (Ref. 6885, 27436).

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

海洋; 深度上下限 150 - 300 m (Ref. 31367).   深水域; 41°N - 5°N

分布 國家 | FAO區域 | 生態系 | 發現紀錄 | Point map | 簡介 | Faunafri

Western Pacific: southeastern Japan and East China Sea, including the Republic of Korea, the Philippines, and the Arafura Sea (Ref. 9819).
西太平洋: 日本東南方與東中國海, 包括韓國，菲律賓, 與阿拉弗拉海.(參考文獻 9819)

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm ?, range 79 - ? cm
Max length : 91.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 247)

簡短描述 檢索表 | 型態特徵 | 形態測量圖

背棘 (總數) : 2; 臀棘: 0.

生物學特性     字彙 (例如 epibenthic)

Found on the outer continental and insular shelves and uppermost slopes, presumably on or near sandy-mud bottom (Ref. 31367, 11230). Ovoviviparous (Ref. 205).

棲息於大陸棚和島嶼棚外緣與最上面的斜坡了, 可能在沙泥底之上或附近.(參考文獻 31367,11230) 卵胎生的.(參考文獻 205)

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

Distinct pairing with embrace (Ref. 205).西太平洋: 日本東南方與東中國海, 包括韓國，菲律賓, 與阿拉弗拉海.(參考文獻 9819)

主要參考資料 Upload your references | 參考文獻 | 合作者 : Compagno, Leonard J.V. | 合作者

Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 1 - Hexanchiformes to Lamniformes. FAO Fish. Synop. 125(4/1):1-249. Rome, FAO. (Ref. 247)

IUCN 瀕危狀態 (Ref. 130435)

  瀕危 (EN) (A2d); Date assessed: 30 August 2019

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

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人類使用

漁業: 低經濟
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Estimates based on models

Preferred temperature (Ref. 115969): 12.4 - 19.6, mean 15.3 (based on 39 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00339 (0.00162 - 0.00707), b=3.10 (2.93 - 3.27), in cm Total Length, based on LWR estimates for this Genus-body shape (Ref. 93245).
營養階層 (Ref. 69278):  4.4   ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  低的, 最小族群倍增時間4.5 - 14 年 (Fec assumed to be <100).
Fishing Vulnerability (Ref. 59153):  High vulnerability (56 of 100).
價格種類 (Ref. 80766):   Medium.