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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 Southern stingray ： ウィキペディア英語版 Southern stingray The southern stingray, ''Dasyatis americana'', is a stingray of the family Dasyatidae (the Whiptail Stingrays) found in tropical and subtropical waters of the Western Atlantic Ocean from New Jersey to southern Brazil.〔http://www.fishbase.org/summary/1247〕 It has a flat, diamond-shaped disc, with a mud brown, olive, and grey dorsal surface and white underbelly (ventral surface).〔BIGELOW, H. & SCHROEDER, W. (1953) Fishes of the Western North Atlantic. Sawfishes, guitarfishes, skates and rays. Mem. Sears Found. Mar. Res.,. Mem. Sears Found. Mar. Res.,, 1, 1-558.〕 The barb on its tail is serrated and covered in a venomous mucous, used for self-defense. == Description == The southern stingray is adapted for life on the sea bed. The flattened, diamond-shaped body has sharp corners, making it more angular than the discs of other rays.〔(Southern Stingray ). Southern stingray Biological Profile, Ichthyology Department, Florida Museum of Natural History (August, 2007) - via ARKive〕 The top of the body varies between olive brown and green in adults, dark grey in juveniles, whilst the underside is predominantly white.〔〔Lieske, E. and Myers, R. (2002) Coral Reef Fishes: Indo-Pacific and Caribbean. HarperCollins Publishers, London – via ARKive〕 The wing-like pectoral fins are used to propel the stingray across the ocean bottom, whilst the slender tail possesses a long, serrated and poisonous spine at the base, used for defence.〔Carpenter, K.E. (2001) The Living Marine Resources of the Western Central Atlantic, Volume 1. Food and Agriculture Organization of the United Nations, Rome – via ARKive〕 These spines are not fatal to humans, but are incredibly painful if stepped on. The eyes are situated on top of the head of the southern stingray, along with small openings called spiracles. The location of the spiracles enables the stingray to take in water whilst lying on the seabed, or when partially buried in sediment. Water enters the spiracles and leaves through the gill openings, bypassing the mouth which is on the underside.〔〔 Female stingrays can grow to a disc width of 150 cm, contrary to the smaller male stingrays that reach maximum size at 67 cm.〔HENNINGSEN, A. (2000) Notes on reproduction in the southern stingray, Dasyatis americana (Chondrichthyes: Dasyatidae), in a captive environment. Copeia, 2000, 826-828.〕〔MCEACHRAN, J. & DE CARVALHO, M. (2002) Dasyatidae. In: K.E. Carpenter (ed.). The living marine resources of the Western Central Atlantic. Volume 1. Introduction, molluscs, crustaceans, hagfishes, sharks, batoid fishes and chimaeras. . 562–571.〕 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「Southern stingray」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.