Chestnut Lamprey

Chestnut Lamprey

Chestnut Lamprey
Chestnut Lamprey attached to a Brown Trout

Chestnut Lamprey

The Chestnut Lamprey, Ichthyomyzon castaneus, is a Native Species commonly found in Lakes and Rivers throughout the Great Lakes region. They are considered to be an indicator species and their presence in a body of water has been closely associated with healthy clean water. There is, however, one negative component to their presence in a watershed and that is the negative impact they can have on fish populations during their parasitic phase.

The chestnut Lamprey has two primary life stages to complete its life cycle. The first life stage is the larval phase, commonly referred to as ammocoetes, in which the larval form is primarily a filter feeding organism. The larva will live in the fine and silty bottom sediments in slower backwater pools for an average of 5-7 years. When the larva reach 4-6 years of age they go through a metamorphosis and develop teeth and a sucking mouth disk characterized by the adult parasitic phase of their life cycle.

The metamorphic phase appears to take place from October through the end of January as the ammocoetes enter the second life stage as parasitic adults. As the water begins to warm up in April the larva exit their burrows and enter the parasitic feeding phase of their life cycle. The Chestnut Lamprey tends to be more active at night and during low light periods. Peak feeding periods for the adults range from May through July with some adults holding over until the following spring to spawn. The adult chestnut lamprey will continue to feed until the peak spawning season occurs from June to July. After spawning the adults will die and the cycle is repeated. (Hall, 1963)

Manistee River

In Michigan, most of our trout streams have an established population of Chestnut Lamprey, but, the Manistee River has been mentioned as having a highly abundant population in the upper portions of the watershed, especially from County Road 612 to Sharon Road. As the water temperature reaches 50 F degrees the adults begin to feed. (Hall, 1963) This temperature change coincides nicely with the obvious annual appearance of Chestnut Lamprey on the trout we catch throughout the first half of our trout season. Most of the trout in our streams will react to streamer patterns tied with a long and “leechy” appearance and lots of undulating movement in the materials.

Matching the Hatch

Chestnut Lamprey will range in size from 4-5” early in their adult development and will attain lengths of +7” at maturity. It’s not a coincidence that as the lamprey continue to become more active that the streamer fishing becomes more consistent for us, especially on the Manistee River. The trout are not only actively feeding at this time, but they are also combating the presence of an “alien intruder” that will parasitize them if they let their guard down! It is not uncommon to see some pretty exciting visuals while fishing “leechy” patterns at this time of year. Some fish will recklessly chase them out of their territory and oftentimes will strike with violent takes.

Take this information for what it is worth, but having an understanding of the natural phenomenon that occurs during this time of the year can only help you. Fly selection, fly movement, and presentation are all critical components to angling success and having one more arrow in the quiver can only be a positive. The Chestnut Lamprey life cycle is really just an example of one more hatch that you should pay close attention to as we move closer to the opening day of trout season here in Michigan.

Hall, J. 1963. An ecological study of the chestnut lamprey, Ichthyomyzon castaneus, in the Manistee River, Michigan. Ann Arbor, MI: University of Michigan.

Dry Flies for Trout

Dry Flies for Trout

Dry Flies

As many of you already know, in 2019 I entered a new partnership with Montana Fly Company to produce and sell some of my favorite patterns. Last season I released several new Dry Flies for Trout. These new releases are patterns from my personal arsenal that I rely upon heavily for catching fish within our region. I am excited to have Montana Fly Company producing and selling my signature fly patterns as we move forward, the quality and attention to detail is second to none! Their is a limited quantity available for sale on our site, but please shop local at your nearest Fly Shop.

The flies that I currently have in production are available in two series. All of the flies are foam based Mayfly patterns that are designed to be fished all day with a touch of realism and an impressionistic silhouette that fish can’t resist. They are all mainstays in my arsenal and have been tied in multiple forms to imitate the Isonychia, Brown Drake, and Hex hatches that are found in Northern Michigan.

Here is a breakdown of all the flies that are currently available through MFC to complete your arsenal of Northern Michigan dry flies for trout . Ask your local fly shop about these patterns and pick some up today!

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McCoys Boondoggle Spinner

McCoys Boondoggle Spinner

New Fly Release

McCoys Boondoggle Spinner
McCoy’s Boondoggle Spinner – Burgundy Isonychia

Montana Fly Company New Fly Release for 2020 – McCoy’s Boondoggle Spinner – Burgundy Isonychia

I am very excited to announce a new fly pattern that will be released by Montana Fly Company in 2020! This fly will be available in two sizes and will help to fill the Isonychia spinner gap in a series of foam based dry flies that I released through MFC in 2019. The McCoys Boondoggle Spinner is very durable, has an irresistible profile, and is generally a must have pattern for the streams in Northern Michigan. Check with your local fly shops for availability, a limited quantity is available here online at Mangled Fly.

Shop Local

As with anything new it can sometimes be hard to predict demand so make sure to stock up before the supply becomes limited. If you are having difficulty finding the McCoy’s Boondoggle Spinner pattern or any of my other fly patterns locally, please drop us a line and we will do our best to help you get these dry flies in your fly box for the upcoming season.

More Flies

Look for several more fly releases with MFC in the near future as I have been expanding upon some old favorites and tinkering with some new stuff for release. Good luck with all of your angling pursuits throughout the upcoming 2020 fishing season!!

Ed McCoy