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Concerns from anglers not seeing as many big flatheads prompted the multi-stream survey. As the top predator, a balanced flathead population is critical to a river’s overall health.
Concerns from anglers get results in Iowa – cool. I wonder if they have a better relationship with their DNR, or if catfishermen have more relative clout due to the less walleye/bass/muskie focus (at least in the interior of the state)?
The article that’s from also points out that sampling flatheads is tricky – one method tends to come up with the small sizes, another the big ones. Can’t say much about a population if you’re sampling only one size class from it, and can’t compare catch per effort from different methods. I’m looking forward to the results, though.
The IDNR has done some surveys to determine if flathead numbers are declining in Iowa, as many anglers believe. As noted, the IDNR doesn’t really know all that much about flathead in the interior rivers.
I would suggest that if flathead numbers are declining, Iowa catfish anglers and the IDNR need to look at currently legal fishing practices. As of now, trotlines and set lines are legal in most of Iowa, including Johnson County where I live. An angler may set up to five trotlines, with fifteen hooks on each, so long as they check them once every twenty-four hours. Anglers may keep fifteen catfish (channel, flathead, or any combination thereof) per day on Iowa interior rivers, along with another fifteen in possession. There are no size restrictions of any sort. On the Mississippi in Iowa, there are no restrictions on catfish numbers or sizes that may be kept.
I will come right out and say that I hate trotlines, and if it were up to me they would be banned outright. As the law now stands, an angler can catch up to seventy-five catfish at a time on trotlines, and can leave them hanging there for up to twenty-four hours. I have to believe the mortality rate for catfish left to fight against a set-line for hours is pretty high, even if they are released. With a daily limit of fifteen catfish, it doesn’t make a whole lot of sense to me to allow anglers to fish seventy-five baits per day, which they can check, and re-bait, as many times as they wish, so long as it is done more than once per day. I also see nothing sporting about trotlines, but that is more of an individual opinion. I do believe, though, that the IDNR needs to cut down on angler harvest of catfish if in fact there is a decline in numbers, and looking at trotlines seems a good way to start.
BTW, as I learned when I moved from Minnesota to southern Iowa six years ago, catfish are more popular down here because the walleye, smallmouth, etc., populations simply aren’t that good on most interior rivers and lakes. This is due to Iowa’s water quality, or lack thereof. Iowa’s rivers and lakes (most of which are actually reservoirs) have to deal with high agricultural run-off, which results in heavy siltation. This keeps the number of walleye and smallmouth down in most Iowa waters. If it were not for stocking, few Iowa reservoirs or interior rivers would have any walleye at all, and as it is there aren’t as many walleye as a decent lake or river in Minnesota has. I spent two frustrating summers trying to catch walleye and smallie on a regular basis on the Iowa and Cedar rivers, and I finally gave up and switched to catfishing around here, as most locals have done all along. I targeted flathead when I lived in Minnesota, but never channel cat, so that was something new for me. Plain and simple, in much of Iowa if you like to fish and catch fish on a regular basis, channel cat are the best thing going.