dcsimg

Life Cycle

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Distinct pairing with embrace (Ref. 205).
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Susan M. Luna
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Biology

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Found on the continental slope (Ref. 6871, 75154). Little is known of its biology; presumably ovoviviparous (Ref. 6871).
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Kent E. Carpenter
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Importance

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fisheries: of no interest
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分布

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分布於西太平洋區,包括日本、東海、臺灣及澳洲海域。臺灣分布於東北部海域。
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臺灣魚類資料庫
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利用

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偶由底拖網捕獲,非重要之經濟魚類。
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描述

provided by The Fish Database of Taiwan
體柔軟光滑,軀幹部粗壯,向後漸細;頭寬扁;尾柄短,稍側扁;吻短而平扁,眼前吻長短於或等於眼徑,前端寬圓;眼大,橢圓形,眼徑約等於或大於眼間距的1/2,無瞬膜或瞬褶;鼻孔大,斜列,距吻端遠比距口裂為近,前鼻瓣呈尖三角形,後鼻瓣具舌形構造,尖端指向內側;口裂寬,弧形,口寬大於口前吻長,吻長小於或約等於1/3口寬,口角具唇褶;齒細小密列,上下顎齒同型,具3齒頭,每側約26-28齒;噴水孔較大,卵圓形,位於眼後上方,前緣有一瓣膜可開閉;第一鰓裂稍小和第五鰓裂稍大,其餘約等大,下部轉入腹面;盾鱗甚小,細針狀,具星狀多邊形基板,體側盾鱗極稀疏,皮膚幾乎裸露,少許盾鱗散布於鰭的基部。背鰭二枚,各具一硬棘,硬棘明顯,兩側各具一溝槽;第一背鰭,起點位於胸鰭末端稍後上方,硬棘稍短,背鰭基底長為垂直高的二倍餘,上角鈍圓,下角尖;第二背鰭稍大於第一背鰭,起點位於腹鰭基底近中後部上方,硬棘微彎,鰭長明顯大於第一背鰭硬棘;兩背鰭間距約等於吻端到第二鰓裂之距離;尾椎軸稍上翹,尾柄無尾前凹窪,上葉發達,後緣具一缺刻;第二背鰭基底末端到尾鰭上葉起點之距離約等於眼睛到第三鰓裂之距離;腹鰭稍大於背鰭,距尾鰭前端遠比距胸鰭為近,外角鈍圓,後角尖突;鰭腳圓柱形,後端尖突彎向腹面;胸鰭小,外角和內角圓;胸鰭與腹鰭間距大於兩背鰭間距,並小於吻端到第一背鰭起點的距離。體黑褐色。
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棲地

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主要生活於大陸棚斜坡水域之深水小型鯊。一般被發現於水深730公尺以上之,水域。雌鯊性成熟長42-44公分。
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Bareskin dogfish

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The bareskin dogfish (Centroscyllium kamoharai) is a little-known, deepwater dogfish shark of the family Etmopteridae.[1][2] This species is found in the western Pacific from southern Japan to western and southeastern Australia as well as in New Zealand waters.[3]

The bareskin dogfish has no anal fin. It has grooved dorsal spines with the second larger than the first, a smaller first dorsal fin, blunt nose, large eyes, large nostrils, widely spaced and sparse denticles, and is dark in color with white-tipped fins. It is stout and grows to a maximum of 40 cm.[4][5] Like other species in the family Etmopteridae (lanternsharks), the bareskin dogfish has a bioluminescent organ on the ventral side. However, perhaps owing to the depth at which the species lives, it has relatively fewer photophores on its ventral skin than others bioluminescent sharks.[6]

Conservation status

The New Zealand Department of Conservation has classified the bareskin dogfish as "Data Deficient" under the New Zealand Threat Classification System.[7]

References

  1. ^ a b Finucci, B.; Kyne, P.M. (2018). "Centroscyllium kamoharai". IUCN Red List of Threatened Species. 2018: e.T41746A68615299. doi:10.2305/IUCN.UK.2018-2.RLTS.T41746A68615299.en. Retrieved 18 November 2021.
  2. ^ "Centroscyllium kamoharai". Integrated Taxonomic Information System. Retrieved 6 February 2006.
  3. ^ Roberts, Clive; Stewart, A. L.; Struthers, Carl D.; Barker, Jeremy; Kortet, Salme; Freeborn, Michelle (2015). The fishes of New Zealand. Vol. 2. Wellington, New Zealand: Te Papa Press. p. 141. ISBN 9780994104168. OCLC 908128805.
  4. ^ FAO Species Catalogue Volume 4 Parts 1, Sharks of the World
  5. ^ Froese, Rainer; Pauly, Daniel (eds.) (2006). "Centroscyllium kamoharai" in FishBase. 06 2006 version.
  6. ^ Claes, Julien M.; Nilsson, Dan-Eric; Straube, Nicolas; Collin, Shaun P.; Mallefet, Jérôme (Mar 10, 2014). "Iso-luminance counterillumination drove bioluminescent shark radiation". Scientific Reports. 4: 4328. doi:10.1038/srep04328. PMC 3948070. PMID 24608897.
  7. ^ Duffy, Clinton A. J.; Francis, Malcolm; Dunn, M. R.; Finucci, Brit; Ford, Richard; Hitchmough, Rod; Rolfe, Jeremy (2018). Conservation status of New Zealand chondrichthyans (chimaeras, sharks and rays), 2016 (PDF). Wellington, New Zealand: Department of Conservation. p. 9. ISBN 9781988514628. OCLC 1042901090.
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Bareskin dogfish: Brief Summary

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The bareskin dogfish (Centroscyllium kamoharai) is a little-known, deepwater dogfish shark of the family Etmopteridae. This species is found in the western Pacific from southern Japan to western and southeastern Australia as well as in New Zealand waters.

The bareskin dogfish has no anal fin. It has grooved dorsal spines with the second larger than the first, a smaller first dorsal fin, blunt nose, large eyes, large nostrils, widely spaced and sparse denticles, and is dark in color with white-tipped fins. It is stout and grows to a maximum of 40 cm. Like other species in the family Etmopteridae (lanternsharks), the bareskin dogfish has a bioluminescent organ on the ventral side. However, perhaps owing to the depth at which the species lives, it has relatively fewer photophores on its ventral skin than others bioluminescent sharks.

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