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Trispot darter
The trispot darter (''Etheostoma trisella'') is a species of darter endemic to the southeastern United States. The average standard length of the fish is .
==Distribution==
The trispot darter is endemic to the Conasauga River and its tributaries〔 located in northern Georgia and southern Tennessee. The species was thought to be extinct from its historical range for seven years, until a specimen was found in north Georgia in 1967. The historical range was in the Alabama River system and as far south as the Coosa River, and in some Georgia rivers. The species also was found in a reservoir, Lake Weiss. Other recent efforts to find the darter have not been successful; it is now only found in the Conasauga〔 and in Alabama's Big Canoe Creek.〔http://www.al.com/news/index.ssf/2015/10/big_canoe_creek_flowing_free_2.html?ath=94bab19520e9c87e0bca67b6cda91167#cmpid=nsltr_strybutton〕 The reason for the decline in distribution is thought to be due to human impact and development. Silt in water affects egg survival, and correct water temperature is vital for the species' breeding. The Conasauga River offers the critical, undisturbed habitat for the species.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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