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<br />LR <br /> <br />Redirection of the levee removal fish evaluation <br />After a meeting of the Levee Removal Group in March 1997, two short comings were identified with the <br />sampling protocol: I) inability to sample native fishes (either they are not there, are in too low of numbers, <br />or cannot be sampled efficiently using existing gears and sampling strategies) in bottom lands and therefore <br />too low to detect a response and 2) do nonnative species increase at the reach level in response to <br />floodplain inundation? <br /> <br />The flJ'St short coming was corrected by redesigning the sampling design in the bottom lands and in the <br />river. Inflows/outflows will be targeted for native fish and more intensive "river reach" sampling will <br />occur with other target YOY/sub-adult native species acting as surrogates (e.g., Colorado squawfish YOY). <br />The second short coming was corrected by incorporating a component to look at the "large scale" non- <br />native response and attempt to make a direct link to inundated area. Two components will be use to <br />correlate the "large scale" nonnative response among years: temporal and spatial infonnation. Temporal <br />data consists of ISMP, CRFP data, and digitizing inundated floodplain area. Depending on the native, <br />nonnative, and endangered fish response, the levee removal group will make a recommendation on future <br />levee removal efforts (see Figure 2, below). <br /> <br />Do Non-native Fish Species Increase at the Reach Level <br />In Responce. to Roodplaln Inundation? <br /> <br /> <br />Proceed wl1h restoration <br />or terrace and depression <br />floodplaIns <br /> <br /> <br />Are native fIsh densities <br />onacted? <br /> <br />Negative 1 <br />Response <br /> <br /> <br />1 <br /> <br />Englneertn.g sok..rtlor\s <br />and nonnottve control <br />recommendot1o~ <br /> <br />10 <br />