| 翻訳と辞書 |
| Dasyatis thetidis ： ウィキペディア英語版 |
Thorntail stingray
The thorntail stingray, black stingray, or longtail stingray (''Dasyatis thetidis'') is a species of stingray in the family Dasyatidae. It is found off southern Africa, Australia, and New Zealand from the intertidal zone to a depth of . This bottom-dweller inhabits soft-bottomed habitats such as lagoons, estuaries, and reefs. Growing to across and over in weight, the thorntail stingray is among the largest stingrays in the world. Uniformly dark above and light below, it has a diamond-shaped pectoral fin disc and a very long, whip-like tail with a fin fold underneath. The upper surface of the disc and the tail bear numerous stout, sharp thorns.
The diet of the thorntail stingray consists of benthic invertebrates and bony fishes. It has been known to gather in large groups during summertime. Like other stingrays, it is aplacental viviparous, with the developing embryos sustained to term by histotroph ("uterine milk") produced by the mother. The venomous stinging spine of the thorntail stingray can inflict a painful injury, though it is not aggressive towards humans. It is caught by commercial and recreational fishers, though the impact of such activities on its population is unknown. As a result, the International Union for Conservation of Nature (IUCN) has listed this species as Data Deficient.
==Taxonomy==
Australian ichthyologist James Douglas Ogilby originally described the thorntail stingray from four specimens collected off New South Wales during the 1898 scientific expedition of the trawler HMCS ''Thetis'', after which the species was named. His account was published a year later in the scientific journal ''Memoirs of the Australian Museum''. Other common names for this species include black skate, black stingaree, long-tailed stingaree, longtail black stingray, thorn stingray, and thorntail ray.
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「Thorntail 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.
|
|