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Weed shiners are listed as endangered in Iowa. In the spring of 1990, one weed shiner (Notropis texanus) was collected from the Crooked Slough Complex, Pool 13 (river mile 554.3) of the Upper Mississippi River System. Prior to this study, there is no record of weed shiners collected in Pool 13. After the initial collection, a follow-up search for weed shiners was undertaken during fall 1990, and during late summer and fall 1991, to estimate relative abundance at this site. The Crooked Slough collection site was seined on three separate occasions, and 1,840 fish were collected. No additional weed shiners were captured. Therefore, the collection efforts do not support the hypothesis that the Crooked Slough collection...
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Incidental catches of turtles have been recorded since the inception of the Long Term Resource Monitoring Program fisheries component in 1989. Large numbers of turtles have been collected by fyke nets used for fisheries assessments in Navigation Pool 13, Upper Mississippi River. As of November 1992, 560 turtles of nine species and subspecies have been sampled, with the Western painted turtle (Chrysemys picta belli) being the most common. Tailwater sampling, initiated in 1990, has produced the largest concentration of turtles, predominantly map (Graptemys spp.) turtles. Starting in 1992, captured turtles were sexed and measured to determine species vital statistics.
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