I found this information about how IDNR does fish surveys and why. I think it's pretty cool but then this is right down my alley.
[url]http://www.in.gov/dnr/fishwild/3352.htm[/url]
[url=http://monitoringprotocols.pbworks.com/w/page/21630006/IDNR%20Fisheries]monitoringprotocols / IDNR Fisheries[/url]
