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Brooks M. Burr 
Fig. 1 . Divisions of major drainages and/or ichthyofaunal blocks as they relate to fish distribution patterns. A, lower Ohio River 
tributaries, Mayfield and Obion creeks and Bayou du Chien. B, Terrapin Creek and other small tributaries of Obion River. C, 
lower Tennessee and Clarks rivers. D, lower Cumberland River. E, Tradewater and lower Green rivers. F, upper Green and 
Barren rivers. G, Salt River. H, upper Cumberland River. J, Kentucky River. K, Licking River. L, Tygart’s Creek, Little Sandy 
and Big Sandy rivers. 
