According to Bill, there is a difference between the taste of these fish and the color of their flesh. For example, the flesh of a recently stocked bow, which has been eating pellet food, is white. Bill states the fish has a mild taste, likening it to orange roughy. After a year in the stream, the bow’s flesh becomes pink and it tastes more like salmon.
One could land a more drably-colored rainbow, surmise it was newly stocked and, perhaps, be correct. Bill admits that the bows at the hatchery are usually more ‘washed-out’ than a fish living in the stream for at least 6-10 months. However, the fish’s need to camouflage itself, its diet and general health, and the water clarity, also determine how brightly-colored it is. For example, a bow landed in muddy water will be more washed-out than a bow living in clear water. Bill even reports that a drably-colored bow sampled from muddy water and placed in a tub of clear water with the sun penetrating it, will appear more brightly-colored by the time it is removed from the tub to be measured. Bill further reports that from his own fishing experience, he’s noted that when he’s fished in March for October-stocked fish, the Rainbows then display brighter cheek patches, more distinct spots on the sides and back, and their pink stripes are much more distinct. Aside from diet, Bill says, “The fish’s desire to camouflage is what drives the whole thing.” Of course the spring rainbow may be dressed in spawning colors, but after about 6 months in a stream environment, the fish takes on the characteristics –and colors- of a wild fish.
And as far as brook trout go, there is no discernible difference between a wild or hatchery-reared brookie. Iowa’s only native trout leave the hatchery with vivid coloration. They are raised in ponds on hatchery property while rainbows are raised in raceways. According to Theresa, “The brook trout we stock as fingerlings are from South Pine. We have also been experimenting with a strain from Ash Creek, WI, on streams where previous efforts at restoration with the South Pine strain failed.”
While clarifying most but not all of the stocked brown trout are fingerlings, Bill detailed that prior to the browns’ peak of spawn in November, DNR personnel remove 150 fish from French Creek, squeeze the eggs and milt from the fish and, ultimately, produce first-generation wild fish that are then stocked as fingerlings in other streams. The adults that had been removed from French Creek are typically returned to this creek after the egg/milt harvest has occurred. However, about 50 fish are kept for 2-3 years as an egg source. Under hatchery conditions the fish get larger than they typically would in the stream and they produce many more eggs. However, egg survival drops as the fish age. These fish are then put back into streams –but not French Creek, keeping it a completely wild fishery. Bill states, “Pretty much any stream that we have that gets stocked with the catchable-sized rainbows, could get one of those big brood (brown trout) fish…maybe one fish per stream, but maybe some streams won’t get one.” Throughout the year, all 3 species of brood trout are released in streams stocked with catchable fish. Brood rainbows are released in the greatest numbers.
The Fisheries Biologist referred to stream-reared fish as having been either naturally reproduced in the stream or having been stocked as fingerlings. He reported that it’s pretty common during fish sampling to see 16-18” browns. While there naturally won’t be a great number of large fish in a stream, Bill said, “I think most of our streams have the chance of having a 20”+ brown trout in it.”
More and more Iowa trout streams are exhibiting natural reproduction. Improvements made to in-stream habitat and the vast amounts of work completed and money spent improving watersheds, are due to cooperation between federal and state land managers, landowners, and non-profit organizations, according to Theresa. With regard to the watersheds, she reported, “If we can treat what runs into the streams before it gets to the streams, many times the streams can heal themselves.”
Theresa also credits some of the reproductive success to a change in the stocking program. She reported that stocking of the catchable-sized ‘domestic’ strain of brown trout was ceased in 2004 because stream sampling of the fingerling strain of French Creek brown trout indicated good survival. She said, “This trend continues now, and we recently have been getting excellent reports of nice size brown trout on sections of streams that hadn’t had any, and really nothing in the watershed had changed but the strain of fish we stocked.”
Stream & Fishing Conditions
There are about 105 cold water streams, located in 10 counties, in NE Iowa. These streams generally provide a supply of 42-58*F spring water, making them cold enough to support trout. During the hottest part of the summer season, the water temperature of these streams remains lower than 75* which bolsters trout survival. Furthermore, the ‘karst topography’ of the area creates the (alkaline) calcium carbonate-containing water, buffering the water, protecting the fish, and supporting a larger and denser insect population.
Many anglers report it is easier to fish the streams in early spring and late fall when vegetation isn’t actively growing or as dense. Pasture streams may provide easiest foot access in warmer weather. Fishing smaller streams such as S. Pine or the upper reaches of French Creek on a summer day may require above-average stream tactics and casting skills. Although the cold of winter may not always be pleasurable, there isn’t much competition from other anglers, and there are no stinging nettles, ticks or mosquitoes with which to contend. However, snowfall does present other challenges to the angler. Many of the stream parking lots are not plowed and one must then park on the gravel roadside. Poor phone reception could be problematic should a vehicle become stuck and assistance required. However, for those who find winter fishing worth the risk, Bill reported that the area of S. Bear and the streams in the Yellow River State Forest have limited plowing. While one would not wisely suggest fishing during deer hunting season, the lots at Bloody Run and S. Bear are sometimes plowed for the hunters. I always stow a blaze orange hat in the suv during the winter season.
When considering a trip to NE IA following heavy rain or high snowmelt, Bill reports there are some streams that stay clearer longer. Streams with better watersheds such as N. and S. Bear, French and Waterloo, and streams with a really small watershed such as S. Pine, don’t get muddy as quickly as other streams. Furthermore, Bill reports that the upper end of any stream or a small tributary coming into a stream may offer better fishing during this timeframe.
Having noted an increasing number of beaver dams on the Iowa trout streams last year, I questioned Bill about the effects of the dams on streams. He reported that over the short-term, the deeper water produced by a dam provides good overhead cover and habitat for fish. However, due to a lot of agriculture in the watershed with a lot of mud coming into the stream during high flows, the dam slows the water down, silt builds up, the pond becomes shallow and the water warms, reducing both trout & invertebrate habitats. Last year, two active beaver dams were present on Coldwater Creek, in a stream section with naturally reproducing brown trout. One dam presented with at least a 5’ difference between the stream bed and the pond’s water surface. Bill reported that a trapper was hired to remove the beavers and that the next flood would, hopefully, remove the dams.
When questioned if the DNR should be notified about stream conditions, Bill immediately responded that one should call the 24-hr hotline, 515-281-8694, to report fish kills or potential environmental spills.
What the Angler Can Do to Protect Streams & Maintain Angler Access
When Bill was questioned about what visitors to NE Iowa can do to help maintain stream health, he summarized that, “Picking up junk as you go up along the stream; thanking landowners when you see them, or getting active with groups like TU & HFFA, that do workdays and volunteer their time to do on-the-stream projects…” are ways to contribute to clean water and healthy streams. Furthermore, he was very emphatic when he said that one should be courteous, especially on private land where there are agreements to fish. He said, “One of the things fishermen can do is… thanking private landowners when you run into them on the stream. Thanking them for allowing the public to fish there really goes a long way. When I go out & meet with folks like that, they remember that, they definitely do.”
One does not need to be on the water, however, to make a difference. Anglers can make a large impact by being an advocate for conservation and knowing what is going in the political process with reference to stream health. The Iowa Environmental Council sends out newsletters to alert readers to what is happening in the legislative process. The Sierra Club operates in a similar manner.
On private property where a verbal agreement is in place, one will frequently see white signs which read, ‘Private Property. Public Fishing Only’. Stiles, allowing one to easily cross a fence, may also be present. However, the owner ultimately decides if these indicators to public fishing are allowed on the property. On private property where an easement is present, DNR staff will be posting new, grey signs reading, ‘Open for Public Fishing. Stream Easement Area’. It’s important to note that signs can be damaged, or even disappear after flooding occurs. Furthermore, while public fishing may be allowed on one section of stream, it may not be allowed along the complete length of the stream. If in doubt, stay out or ask the landowner. There are plenty of fishing opportunities in the region.
As written above, agreements/easements on private property allow public fishing and nothing more. No camping is allowed. On public land, camping is allowed. In IA State Forests, camping is available in non-modern, designated campgrounds. In IA State Parks, with use of a reservation system camping is available in designated areas. In Wildlife Management Areas, camping is available in designated areas or the camper may legally hike elsewhere and set-up camp in a non-designated area, unless otherwise posted. Regardless, one is expected to ‘leave no trace’. Camping is allowed up to 14 consecutive days in all 3 publicly-designated land-types.
DNR Trout Map, Website and Other Resources
I consider NE Iowa a hidden treasure. It amazes me that this beautiful, green ‘Midwestern Montana’ isn’t overrun with tourists. However, during my introductory drives to NE Iowa, I also considered the region to be a hidden treasure simply because it also took me half a day on gravel, winding roads to find the elusive parking lot for a trout stream. Since those early days, I’ve acquired 2 GPS units, two books about Iowa trout streams, an updated Trout Map, and a little wisdom. I’m also considering (map) reading glasses.
The DNR website has been redesigned and an added feature includes the expanded general fishing and trout fishing sections found under the Fishing tab. The trout stream link found on the website will take one to a table listing the streams, their locations and their lengths. Another link on that page provides more stream details and a printable map of the stream. Under the Environment tab, the “Mapping & GIS” page can be selected. An excellent link is the “basic map” found below the Web Map Applications heading. It allows for different mapping options, zoom features, and the appearance of GPS coordinates when the cursor is placed over a desired location.
Fishing regulations are available on the website and, to a limited extent, on the trout map. Signs are also typically posted along special regulation sections of streams. Iowa fish are generally safe to eat and the website provides additional details. Of course, a fishing license and a trout stamp are required to fish for trout and can also be purchased through the website.
The beauty of NE Iowa makes it easy to enjoy fishing in the region. Other advantages to Iowa trout fishing are both that the season is open and much of the streams have free-flowing water every day of the year! The rest is up to you. (3/20/12)
Trout Unlimited (TU) Chapters in Iowa:
Des Moines: http://www.tu-northbear.org/
Iowa City: http://www.tu-iaspringcreeks.org/
DNR website links:
Mapping and GIS: iowadnr.gov/Environment/MappingGIS.aspx
Decorah Fish Rearing Station: 563-382-8324
Big Spring Fish Rearing Station: 563-245-2446
Turn In Poachers (TIP) hotline: 800-532-2020