The status of the weed shiner (Notropis texanus) in Pool 13 of the Upper Mississippi River

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 site contains critical habitat
for weed shiners or a viable population of weed shiners. 
Collection of the single specimen during the spring of 1990
suggests that abundance of weed shiners is low at this site.