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<br />Table 1. Data sources and assumptions for green sunfish suitability indices. <br /> <br />Variable and Source <br /> <br />Assumption <br /> <br />II <br /> <br />V1 <br /> <br />Minckley 1963 <br />Moyle and Nichols 1973 <br />Forshage and Carter 1974 <br /> <br />V2 <br /> <br />Brown 1960 <br />Minckley 1963 <br />Summerfelt 1967 <br />Harlan and Speaker 1969 <br />Moyle and Nichols 1973 <br /> <br />V3 <br /> <br />Trautman 1957 <br />Funk 1975a, b <br /> <br />Moore 1942 (BG) <br />Petit 1973 (BG) <br /> <br />V4 <br /> <br />Vs <br /> <br />Jenkins and Finnell 1957 <br />Trautman 1957 <br />Cross 1967 <br />Moyle and Nichols 1973 <br /> <br />Vs <br /> <br />Trama 1954 (BG) <br />Stroud 1967 (freshwater fish) <br />Calabrese 1969 (BG) <br /> <br />V7 <br /> <br />Sigler and Miller 1963 <br />Proffitt and Benda 1971 <br />Jude 1973 <br />Beitinger et al. 1975 <br />Cherry et al. 1975 <br />Jones and Irwin 1975 <br />Carlander 1977 <br /> <br />Vegetation, rocks, and debris have <br />similar value as cover objects. The <br />average percent (35%) bottom covered by <br />vegetation in areas where green sunfish <br />were collected in streams is an optimal <br />value for cover. <br /> <br />Green sunfish typically inhabit pool <br />areas of streams, and optimal habitat <br />consists of at least 50% pool area. <br /> <br />Species abundance is greatest in <br />lower (~ 2 m/km) gradient streams. <br /> <br />Dissolved oxygen requirements are <br />presumably similar to those of the <br />bluegill. D.O. levels that are near- <br />lethal are unsuitable, and levels <br />that result in avoidance are suboptimal. <br /> <br />Moderate (25-100 JTU) turbidities <br />correlated with ~igh species <br />abundance are optimum. <br /> <br />Optimal pH range is presumably the <br />same as that for all freshwater fish. <br />Levels that impair growth or repro- <br />duction are suboptimal, and levels that <br />lead to death are unsuitable. <br /> <br />Optimal temperatures for adults and <br />juveniles are those where growth and <br />food conversion efficiency are <br />maximal. <br /> <br />17 <br />