The Iowa Department of Natural Resources is asking the public to be moreaggressive in reporting fish kills. Recent kills in Lake Delhi near Manchester went unreported for several weeks. D-N-R spokesman MickKlemesrud says you need to use good judgement in determiningthere is a problem.Klemesrud says the quicker a kill is reported, the sooner investigators candetermine the cause.He says to report any suspicious kill to a DNR office or local lawenforcement authorities.Klemesrud says residents in the area of Lake Delhi had noticed dead fishperiodically and didn’t report them until a larger kill was reported.