| 翻訳と辞書 |
| The Shad Foundation ： ウィキペディア英語版 |
The Shad Foundation
The Shad Foundation is an international non-profit 501(c)(3) organization established in 1996 for the study, protection, and celebration of shads around the world. Currently, there are more than 30 recognized shad species worldwide.〔(Vol.7. Clupeoid fishes of the world (Suborder Clupeoidei) by Peter J.P. Whitehead )〕 Shad, which are members of the herring family, are widely distributed, and many are anadromous, meaning that they migrate from fresh to salt water as juveniles and return to freshwater for the express purpose of spawning. Many species are threatened by water pollution, over-fishing, habitat destruction, and obstacles to migration, such as dams.〔(Fish Ladders on U.S. Dams Are Not Effective by John Waldman )〕
== How It Started ==
In the summer of 1995, Rich Hinrichsen and Curtis Ebbesmeyer peered into a fish ladder through an algae-stained window, hoping to witness a great biologic event: the return of the Columbia River's Pacific salmon. The fish ladders at Bonneville Dam were in fact filled with silver migrants, but oddly, few salmon could be counted among them. Another fish—once foreign to the Columbia—accounted for the great silvery flood: the American shad. American Shad made their way to the Columbia after 1871 when Seth Green planted some fry in the Sacramento River, California. By 1938, when Bonneville Dam was completed and counts at the fishways were first tallied, only 5,000 were counted. Over the next half century the American Shad adult count at Bonneville Dam sometimes exceeded 3 million.,〔(Army Corp of Engineers fish counts and reports )〕 While fish managers on the Atlantic Coast of the United States struggled to save American Shad runs American Shad remain depleted.〔(2007 Atlantic States Marine Fisheries Commission American Shad Stock Assessment Report )〕 But American Shad on the Pacific Coast of the United States thrive greatly.〔(Article on the Colonization of The Columbia River by American Shad )〕 Spurred on by curiosity and the discovery that there were 30+ recognized shad species world-wide〔 Hinrichsen and Ebbesmeyer, launched the Shad Foundation.
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「The Shad Foundation」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.
|
|