Lake Wingra: Fish Abundance

Data are collected annually to enable us to track the fish assemblages of Lake Wingra. Sampling is done at six littoral zone sites per lake with a beach seine, minnow or crayfish traps, and fyke nets, while a boat-mounted electrofishing system samples four littoral transects. Vertically hung gill nets are used to obtain two pelagic samples per lake from the deepest point. A trammel net samples across the thermocline at two nearshore sites per lake. Fish are identified to species. Lengths are measured for all fish caught, while weight and scale are collected from a subset. Derived data include catch per unit effort and size distribution by species, lake, and year. Protocol used to generate data: Gill net data have been standardized to a 24-hour sampling period. Assumptions used in the standardization are available from the investigators. Number caught for each species is summed over repetitions of a gear within a lake and over depth Sampling Frequency: annually Number of sites: 1