During the last week of May staff from the Columbia National Fish and Wildlife Conservation Office, DeSoto National Wildlife Refuge (NWR), and Iowa Department of Natural Resources teamed up to sample DeSoto Lake in Missouri Valley, Iowa. This sampling was completed as part of a long-term monitoring and management program started in the 1970s.  The four-day sampling included both day and night electrofishing as well as fyke netting.  Although tornado watches in the area made sampling difficult at times, we were able to safely and successfully collect the required data. Although many of the usual fish species were captured, we were particularly concerned about an increase in yellow bass captured as this species is known to be a nuisance species in area lakes. That data can now be analyzed and incorporated into the annual DeSoto Lake Management Plan. Our team of inter-jurisdictional biologists can then make management decisions to help improve DeSoto Lake recreational fishing.