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Etheostoma bison : ウィキペディア英語版 | Buffalo darter
The buffalo darter (''Etheostoma bison'') is found in the tributaries of the lower Duck and lower Tennessee Rivers. It is distinguished from other darter species by the presence of eight anal rays,〔http://fishbase.sinica.edu.tw/summary/SpeciesSummary.php?id=50702〕 as well breeding males having a unique hump behind the head reminiscent of a buffalo. ==Geographic distribution== ''E. bison'' is found in a very small range of tributaries in Tennessee, although a population survey has not been done to assess the actual range of these species specifically. The current distribution of this species is only known to be in the tributaries of the lower Duck and Tennessee Rivers.〔 This small area of habitats and limited sightings could be due to these fish evolving to inhabit smaller, less connected areas of these rivers, or it could be due to human disturbances, such as erosion and dam building.
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「Buffalo darter」の詳細全文を読む
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