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e <br />ESPEY, HUSTON &ASSOCIATES, INC. <br />• <br />Hess sampler (250-micron mesh) (Usinger 1956). One additional qualitative sample <br />was taken at each station with a kick sampler. <br />Due to the reduced flow present in Curtis Creek during the July and <br />September, 1979 sampling period, four samples were taken at the three stations with <br />a Ponaz 6-inch x b-inch grab sampler. During this period, FF Creek had no flow and <br />no samples were taken on this creek. <br />The stations set up and sampled during 1979 were frozen over during the <br />January, 1980 sampling period. Therefore, sampling was conducted in adjacent ice- <br />free portions of the stream, where available. Several portions of Curtis Creek were <br />found to be open, whereas none of FF Creek was free of ice. Therefore, a station <br />(north station) was located 30 meters downstream from previous sampling site CC-3, <br />and another (south station) was located 70 meters downstream from previous site <br />CC-1. Four samples were taken at each of these stations with a Ponaz 6-inch x 6- <br />inch grab sampler. <br />All samples were preserved in 70 percent ethyl alcohol in the field and <br />returned to the laboratory of BIO/WEST, Inc., subsampled, and sorted. Individuals <br />were identified to the lowest practical taxon and counted. Results aze reported as <br />the average and standazd deviation of four 36-squaze inch replicates. A measure of <br />macroinvertebrate diversity was computed for each study site using the Shannon- <br />Weaver Diversity Index d, using the machine formula of Lloyd et al. (1968): <br />d= N (N1og10N-Enilogl0ni) <br />where C = 3.321928 (converts 1og10 to log2) <br />N =Total number of individuals, and <br />nl =number of individuals in ith species. <br />• <br />L-11 <br />