The golden redhorse and black bullhead have specific habitat preferences that are not evident in the above discussion. My collections indicate that the golden redhorse prefers deep water having some current, whereas the black bullhead prefers little or no current.
Species that prevailed in or near riffles were: creek chub, sucker-mouthed minnow, stoneroller, channel catfish (young-of-the-year only), flathead (young-of-the-year only), stonecat, slender-headed darter, and orange-throated darter. Of these species, the sucker-mouthed minnow, slender-headed darter and orange-throated darter reached their greatest abundance at Area 3, where the riffle is shallow, slow, and has a bottom composed of flat limestone rubble.
The riffle at Area 1 is, for the most part, deeper and faster than at Area 3 and has a bottom composed of gravel and small rocks. The creek chub, stoneroller, channel catfish (young-of-the-year), flathead (young-of-the-year), and stonecat reached their greatest abundance in Area 1. All species that showed a preference for riffles were rare or absent in Area 5 where no riffle-habitat was sampled. The riffle-dwelling species that were present in collections made with rotenone in the deeper pools were taken from the riffle into which rotenone was introduced.
Table 13. Relative Abundance of Fish (Per Cent of Total Population Made Up by Each Species), in the First Collection Made in Each of Four Different Shallow Areas by Means of the Shocker, is Shown in Vertical Columns 1-4. Results of the Use of Rotenone in a Fifth, Deeper Area are Shown in Column 5. Column 6 Combines Data from All Collections Made by Using the Shocker in Seven Shallow Areas (Including Columns 1-4).
| Area 1 | Area 3 | Area 5 | Area 6 | Rotenone | All areas | |
|---|---|---|---|---|---|---|
| Big-mouthed Buffalo | .... | .... | T[E] | .... | T | T |
| Small-mouthed Buffalo | .... | .... | .6 | .... | T | T |
| River Carpsucker | .... | T | 10.6 | T | 1.8 | .8 |
| River Carpsucker (yy)[F] | .... | .8 | T | 3.7 | .... | 1.0 |
| Short-headed Redhorse | .... | .... | .6 | .... | .... | T |
| Golden Redhorse | .8 | 1.0 | 3.2 | .... | 5.7 | T |
| Carp | .... | .... | .... | .... | .... | T |
| Golden Shiner | .... | .... | .... | .... | .... | T |
| Creek Chub | 1.6 | T | T | T | .8 | T |
| Sucker-mouthed Minnow | .... | 11.2 | T | 3.4 | .... | 1.4 |
| Red-finned Shiner | .... | .... | .... | 4.0 | .8 | 8.1 |
| Red Shiner | 18.2 | 24.0 | 7.8 | 20.1 | 12.1 | 35.9 |
| Sand Shiner | .... | 5.2 | .... | 1.1 | .... | T |
| Pimephales (yy) | .... | .... | .... | .... | .... | 6.7 |
| Mountain Minnow | .... | .... | .... | T | .... | T |
| Blunt-nosed Minnow | .... | .8 | 4.1 | 11.7 | T | 3.4 |
| Parrot Minnow | .... | .... | .... | .... | .... | T |
| Fat-headed Minnow | T | T | 3.4 | 12.1 | 1.4 | 2.6 |
| Stoneroller | 27.7 | 17.4 | .6 | 5.8 | 3.5 | 5.1 |
| Black Bullhead | 2.1 | T | 7.3 | T | 32.0 | .6 |
| Yellow Bullhead | T | T | .... | T | 2.5 | T |
| Channel Catfish (j)[G] | 5.8 | 7.6 | 41.3 | T | 14.6 | 4.2 |
| Channel Catfish (yy) | 9.5 | 7.0 | T | 4.3 | 3.9 | 2.5 |
| Flathead (j) | .... | .8 | 2.1 | T | T | T |
| Flathead (yy) | 1.6 | T | .... | .... | .... | T |
| Stonecat | 10.3 | 1.4 | .... | .... | 1.4 | .7 |
| Spotted Bass | .... | T | .6 | T | .8 | T |
| Largemouth | .... | .... | T | .... | T | T |
| Green Sunfish | 11.2 | 3.5 | 5.9 | 12.2 | 6.4 | 10.1 |
| Long-eared Sunfish | 5.4 | 6.0 | 5.1 | 14.6 | 1.9 | 12.8 |
| Orange-spotted Sunfish | T | T | 1.4 | 1.8 | 2.5 | .5 |
| Bluegill | .... | .... | 1.0 | .... | T | T |
| White Crappie | .... | .... | .... | .... | T | T |
| Logperch | T | T | T | T | .8 | T |
| Slender-headed Darter | T | 11.4 | 1.1 | 1.6 | 3.1 | 1.3 |
| Orange-throated Darter | .8 | 1.8 | T | .5 | 2.5 | T |
| Freshwater Drum | .... | .... | T | .... | .... | T |
| Total number of fish | 242 | 484 | 727 | 924 | 513 | 17,796 |
| Area in square feet | 840 | 6324 | 12500 | 10000 | .... | .... |
| Volume | .... | .... | .... | .... | ⅓ acre-foot |
The river carpsucker, blunt-nosed minnow, fat-headed minnow, channel catfish (yearlings and two-year-olds), flathead (yearlings and two-year-olds), green sunfish and long-eared sunfish showed a preference for shallow, quiet water. All of these species were more common in collections from Areas 5 and 6 than in collections from other areas.
Temporal Variability of Fauna in the Same Areas
The variability of the population in successive collections from the same area is presented in Table 14. Supplementary data obtained in Areas 2, 4 and 7 support conclusions discussed below for Areas 1, 3 and 6. The abundance of some species maintained a constant level, whereas that of others varied.