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Species | Upstream | Downstream
| station | station
--------------------------+----------+-----------
_Ictalurus melas_ | 45% |
_Lepomis humilis_ | 48% | 40%
_Notropis lutrensis_ | 5% | 30%
_Lepomis cyanellus_ | 2% | 20%
_Fundulus notatus_ | | 10%
--------------------------+----------+-----------
At two other stations, only _Lepomis cyanellus_ was found. One of these
stations consisted of several small spring-fed pools in a dry arroyo
tributary to Little Beaver Creek. Around these small "oases" rushes and
smartweeds grew and blackbirds were nesting in the rushes. Although
green sunfish up to eight inches in length were common in the shallow
pools, no other species was found. The second station (C-17) on the East
Fork Big Caney River is of special interest. The pool was isolated, had
dimensions of about 25x25 feet, and had an average depth of 15 inches.
The water was foul; cows had been fed fodder in a sheltered area above
the pool during the preceding winter and the entire bottom was covered
to a depth of 6 inches to 1 foot with a detritus of decomposing fodder,
cattle feces, and leaves. The water became almost inky in consistency
when the bottom was stirred and its odor was offensive. A thick
gray-green bloom lay on the surface. This bloom was full of bubbles
indicating gases rising from the bottom muds. One hundred fifty-three
green sunfish, all less than 5 inches in length, were taken in one
seine-haul at this station.