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ISMP backwater sampling evaluation <br />he designed to deliver the information that is needed. Other key information needs include <br />obtaining a better understanding of the dispersal and population ecology of centrarchids in the <br />Grand Valley reach of the Colorado River and defining their role in regulating the abundance of <br />rare native fishes. Such information would help determine if efforts to enhance floodplain sport <br />fisheries were influencing riverine centrarchid populations, and assist managers in allocating <br />resources to strategies that most effectively improve the status of endangered and other native <br />fishes. <br />v