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Table 1. Data sources and assumptions for. channel catfish suitability indices. Variable and source- Assumption' V1 Bailey and Harrison 1948 Optimum conditions for a diversity of velocities, depths, and structural features for c~iannel catfish will be found, when there are approximately equal amounts of pools and riffles. UZ Bailey and Harrison 1948 The strong preference of all life stages ` Marzolf 1957 indicates- of channel catfish for cover Cross and Collins 1975 that some cover must be present for optimum conditions to occur. V, Bailey and Harrison 1948 Lakes with smail littoral area will pro- Marzolf 1957 vide ]ess area for cover-and food pro- Cross and Collins-1975 duction for channel catf ish and are there- fore less suitable. V4 Bailey and Harrison 1948 The amount and type of substrate or the amount of aquatic vegetation associated with high production of aquatic insects (used as food by channel catfish and channel catfish prey species) is optimum. VS Clemens and Sneed 1957 Temperatures at the warmest time of year West 1966 must reach levels that permit growth in Shrable et al. 1969 order for habitat to be suitable. Optimum Starostka and Nelson 1974 temperatures are those when maximum growth Biesinger et al. 1979 occurs. V6 Jenkins 1970 Growing seasons that are correlated with high standing crops are optimum. V, Finnell and Jenkins 1954 High turbidity levels are associated with Buck 1956 reduced standing crops and therefore are Marzolf 1957 less suitable. V$ Moss and Scott 1961 Lethal levels of dissolved oxygen are Andrews et al. 1973 unsuitable. DO levels that reduce feeding Carlson et al. 1974 are suboptimal. Randolph and Clemens 1976 U9 Perry and Avault 1968 Salinity levels where adults are most Perry 1973 abundant are optimum. Any salinity level at which adults have been reported has some suitabilty. C] 18