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• 2.4 Aquatic Biology <br />2.4.1 Aquatic Hacroinvertebrates and Macrophytes <br />Samples for aquatic macroiavertebrates were collected oa July S, <br />1979 from four station.; using a one square foot Surber sampler and a <br />pole mounted Ekman dredge. The location of each station is shown in <br />Figure 2.1.1-1. With the exception of upper Foidel Creek and the adja- <br />cent reservoir (Reservoir No. 1), two Surber samples and two Ekman <br />dredge samples were collected at each of the remaining three stations. <br />Due to lack of adequate flow in the grass and weed choked channel <br />of upper Foidel Creek above Reservoir No. 1, only one dredge sample was <br />taken from the creek itself. Two dredge samples were subsequently taken <br />from the reservoir as it was essentially the most important aquatic <br />habitat in the upper reaches of Foidel Creek 'during the early July <br />• sampling trip. <br />Surber samples were taken in duplicate from representative habitat <br />where flow was sufficient. Each sample represented one square foot of <br />bottom area. Duplicate Ekman dredge samples were taken from representa- <br />five pool habitat. Each Ekman sample consisted ~f [wo grabs and thus <br />was equivalent to one-half a square foot. A total of 15 aquatic macro- <br />invertebrate samples were collected. <br />In the field, each Ekman dredge sample was placed in a sieve bucket <br />(No. 30 mesh) and rinsed of excess silt and debris. The samples were <br />placed is wide-mouth polypropylene jars, labeled and preserved with 10 <br />percent formalin. Surber samples were similarly treated, labeled, and <br />preserved with 10 percent formalin. <br />In the laboratory, samples were rinsed of excess formalin in a <br />• standard No. 30 sieve and sorted from the debris in white enameled pans. <br />