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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Bahamas sawshark ： ウィキペディア英語版 Bahamas sawshark The Bahamas sawshark, ''Pristiophorus schroederi'', is a sawshark of the family Pristiophoridae, found in the western Central Atlantic Ocean from the Bahamas and Cuba at depths of between 400 and 1,000 m. These sharks are at least 80 cm long. The Bahamas sawshark is found on continental and insular slopes. Its reproduction is ovoviviparous. ''P. schroederi'' is the first member of the Sawsharks (family ''Pristiophoridae'') described from the western hemisphere.〔Springer, Stewart, and Harvey R. Bullis, Jr. "A New Species of Sawshark, Pristiophorus Schroederi, From the Bahamas." Bulletin of Marine Science 10.2 (1960): 241-54. Ingentaconnect. Web. May 31, 2013.〕 Like its family members, it is most likely a descendent of the Cenozoic sawshark, ''Pristiophorus lanceolatus'' from New Zealand and Australia.〔Keyes, W. I. "The Cenozoic Sawshark Pristiophorus Lanceolatus (Davis) (Order Selachii) of New Zealand and Australia, with a Review of the Phylogeny and Distribution of World Fossil and Extant Pristiophoridae." New Zealand Journal of Geology and Geophysics 25.4 (1982): 459-74. ProQuest. Web. 2 June 2013.〕 It is a poorly known family and only consists of six members: ''P. cirratus, P. delicatus, P. japinicus, P. nancyae, P. nudipinnis, and P. schroederi.''〔 Three specimens of ''Pristiophoridae schroederi'' were discovered; 38.3, 64.5, and 80.5 centimeters in length, were collected by an incidental product of exploratory fishing operations by the U.S. Bureau of Commercial Fisheries.〔 One was discovered in the Santaren Channel and two from the Atlantic, just north of Little Bahama Bank.〔 == Behavior == Despite the menacing appearance of this sawshark, it tends to feed primarily on fish and crustaceans like other species of its kind.〔 They feed primarily on the seafloor.〔Look, A. Closer. "The Evolution of Shark Dentition." Colostate.edu〕 Although most shark species tend to spend most of their time solitary, sawsharks are known to form schools.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bahamas sawshark」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.