| 翻訳と辞書 |
| Semotilus atromaculatus ： ウィキペディア英語版 |
Semotilus atromaculatus
''Semotilus atromaculatus'', known as the creek chub or the common creek chub, is a small minnow, a freshwater fish found in the eastern US and Canada. Differing in size and color depending on origin of development, the creek chub can usually be defined by a dark brown body with a white lateral line spanning horizontally across the body. It lives primarily within streams and rivers. Creek Chubs attain lengths of 2-6 inches with larger specimens of up to 12 inches possible. The genus name ''Semotilus'' derives from the Greek word ''sema'' (also known as dorsal fin), and ''atromaculatus'' comes from the Latin word "black spots".
== Distribution and habitat==
A fish which can withstand many different environments, the creek chub's current range is the eastern two-thirds of the US and southeastern Canada. It can quickly adapt to different extreme environments, and can live on many different foods. Documented to span throughout the Great Lakes surrounding Wisconsin, and into Minnesota, this species has been described as plentiful. However, reports of this species have fallen throughout Wisconsin and the Great Lakes, suggesting a decline in its population in these regions.〔Hubbs, Carl L., Karl F. Lagler, and Gerald Ray. Smith. 2004. Fishes of the Great Lakes Region. Ann Arbor: University of Michigan. pg 213.〕
Though populations have been declining within the Great Lakes, they have been continually documented throughout small and medium rivers and streams. Thriving in small stream environments, the creek chub gravitates toward areas of weeds to appear secure and avoid predation. Varying in environments containing a multitude of substrates, they have been documented over gravel, sand, silt, rubble, mud, boulders, clay, bedrock and detritus bottoms.〔Becker, George C. 1983. Fishes of Wisconsin. Madison: University of Wisconsin, 1983. pg. 437-441.〕 This fish actually prefers the stream or river environment compared to that of a lake, as they have been recorded in streams far more than lakes. Of over 440 individuals caught, only 9 were from lakes, and when limiting the locations to solely lakes, only six individuals were caught.〔Copes, F. 1978. Ecology of the creek chub ''Semotilus atromaculatus'' (Mitchill) in northern waters. Univ. Wis., Stevens Point, Mus. Nat. Hist. Fauna and Flora Wis. Rep. No. 12:1-21.〕
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「Semotilus atromaculatus」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.
|
|