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samples per station provide a basis for various statistical analyses, if random samples are all taken from <br /> a rubble substrate in as similar habitat as possible, taking into account mainly the velocity of flow and <br /> depth in the stream. Biologists have found that compared to other sampling devices, the Winget-modified <br /> Surber net yields the highest coefficient of correlation (similarity of samples). <br /> 1 <br />,J <br /> A stream's natural potential for productivity,habitat quality, and water quality can be compared <br /> to the "actual" by taking quantitative samples of aquatic macroinvertebrates. Careful analysis of <br /> macroinvertebrate communities can reveal conditions and trends in aquatic ecosystems. Sampling and <br /> analysis is conducted in accordance with procedures outlined in FSH R-4 2609.23, March 1985, Fisheries <br /> f. <br /> Habitat Surveys Handbook. <br /> This report is based upon 92 aquatic macroinvertebrate samples from seventeen stations on nine <br /> streams, along with the physical habitat and water chemistry data provided by your aquatic specialists. <br /> Streams monitored include Bear Creek, East Fork Brush Creek, Coal Creek, Crystal River, Dutch Creek, <br /> Gypsum Creek, Peru Creek, Snake River, and North Fork White River. <br /> I <br /> i <br /> n <br /> ?4 <br />