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Slough darter
The slough darter (''Etheostoma gracile'') is a small fish species of least conservation concern in the darter (Percidae) family. It inhabits slow to moderately flowing waters and with substrates that are predominantly mud, silt, or sand. Major food sources include chironomids, copepods, and cladocerans, as well as mayflies in the spring. Adults reach total length. It is one of the 324 species of fish found in Tennessee.
At the southern end of its range in Texas, the slough darter breeds from January to March, while at the northern end of its range in Illinois, it breeds in May and June.〔 The eggs are attached to submerged vegetation, leaves, or twigs, and the adults do not guard them as some other members of this family do.〔
==Distribution and habitat==
''E. gracile'' is found in the Mississippi River basin from central Illinois and northeastern Missouri to Louisiana, also in the Red River drainages to southeastern Kansas and eastern Oklahoma, and the Gulf Slope drainages from the Tombigbee River in Mississippi to the Nueces River in Texas.〔 Suitable habitats include pools of slow-flowing water in small streams, backwaters of larger rivers, turbid water over sand or mud, oxbow lakes, swamps, and among vegetation.〔
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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