Didymo on the Upper Manistee

Didymo on the Upper Manistee

Didymo

Didymo on the Upper Manistee continues to be a problem as it expands its chokehold upon the river.  During August of 2022 we found new Didymo growth from Yellow Trees to the CCC Bridge.  Didymo was not found previously in sections upstream of CCC Bridge.  To put it bluntly, I would consider the entire Upper Manistee River System to be contaminated.  Didymo is considered a very resilient invasive species and anglers will have to practice safe gear cleaning techniques to prevent spreading it between watersheds.  These same cleaning practices will need to be followed after every fishing trip.  It can be spread very easily and can result in detrimental outcomes for our trout streams. 

We continue to follow the current safe cleaning practices for our gear.  Currently, there are no effective methods to eradicate Didymo once it is established in a river. 

To prevent spreading Didymo Clean, Drain, Dry your gear before entering another Body of Water. 

  • Clean your gear by removing mud and debris from all surfaces.
  • Use a 10% Solution of Dishwashing Soap with hot water for 10 minutes. Then it must dry for 48 hours (mandatory if your fishing different streams).

The extent of the Didymo bloom on the Upper Manistee in 2021 was unbelievable.  Didymo was observed in every section we fished downstream of the CCC Bridge.  In one winter Didymo covered nearly 60 miles of stream bottom!  This single event is disheartening when you consider any effort to limit its expansion into neighboring watersheds.  Any efforts to do so are going to require extensive stream monitoring and habitat resiliency testing.

To determine the overall affect of Didymo on the Upper Manistee River is going to take time.  However, the short term implications haven’t been favorable.  The impacts to the fishing and our hatches were immediate.  The hatches were inconsistent and showed lower overall insect abundance.  The most alarming trend was a 65-80% decline in our catch rates.  This decline was especially noticeable in sections dominated by Brown Trout.  I would argue that Brown Trout abundance was immediately impacted by the presence of Didymo.  

I expect Didymo will continue to expand its foothold in the Upper Manistee River as we enter 2023.  The fall leaf drop will allow more sunlight penetration through the canopy and the colder temperatures will promote new Didymo growth.  Further habitat decline will continue to allow for it to take over and expand its range in previously unaffected sections.  At this current time I am not very optimistic that Didymo has run its course and will become dormant anytime soon.

Change the Conversation

This has been arguably one of the toughest trout seasons I have seen.  The amount of change that has occurred over the past 5 to 6 years is very alarming.  The Upper Manistee River has some systemic issues and neglected circumstances that need to be addressed.  Habitat loss, water quality, invasive species concerns, all have reached their tipping point.  We need to institute some major changes in our management approach if our aquatic resources are going to last for future generations to enjoy.  It’s time to change the conversation!

Our state needs to manage our lakes and streams from a watershed perspective with a holistic approach. You can’t ask one biologist to manage several watersheds with the expectation of being effective, efficient, and able to identify problems before they occur.  We need to bring Fisheries, Wildlife, and Forestry divisions to the same table.  These departments need to review all the management recommendations under one microscope before implementing any action plans. The old days of stream management “between the river banks” has long outlived its effectiveness and we need a new direction moving forward.

The Upper Manistee River is designated as a Natural River.  A Natural River is afforded extra protections for “the purpose of preserving and enhancing its values for water conservation, its free flowing condition, and its fish, wildlife, boating, scenic, aesthetic, floodplain, ecologic, historic, and recreational values and uses.  The area shall include adjoining or related lands as appropriate to the purposes of the designation.  The department shall prepare and adopt a long-range comprehensive plan for a designated natural river area that sets forth the purposes of the designation, proposed uses of lands and waters, and management measures designed to accomplish the purposes.”  Yet the river is failing to thrive under these protections! 

Natural Rivers Act

The Natural Rivers Act designation was implemented to enhance the river, but the permitting process for habitat projects is making this crucial work more expensive and harder to complete.  It may be time to retool this law and make it more user friendly for its intended purpose.  It’s also time to have a serious discussion about increasing the stream buffer protections afforded by this act.  Moving forward we need to hold our State agencies more accountable for their failures, but also applaud them for their successes.   Unfortunately our State failed miserably at developing an effective awareness campaign for Didymo.  

Many of the issues I have mentioned are fixable, but it is going to take time, money, and hard work.  Didymo didn’t just appear over night, this problem has been several years in the making.  Didymo is just a symptom of larger systemic issues plaguing an already unhealthy system.  It has likely been in the Upper Manistee River for some time, but the necessary conditions for Didymo to take over are just now being exposed.  The overall river health is at its tipping point.  Habitat decline, nutrient decline, extensive low-flow periods, increased solar exposure, and uniform habitats characterized by increasingly wide, shallow, sandy areas have all accelerated in the past 5 years.  Our streams are in desperate need of more habitat monitoring and rehabilitation programs to mitigate the accelerated pace of change and unbalanced outcomes.

Unforeseeable Changes

Trout Fishing on the Upper Manistee

The Upper Manistee River Trout Fishing has been up and down throughout 2022.  Hatches were lighter and far more inconsistent than what we should experience.   More intense rain events followed by longer low-flow periods and drought are increasing the stream width and sedimentation issues.  The loss of large woody debris has now outpaced the recruitment of new woody structure.  Changing Hydrologic conditions and the lack of stable woody debris structures have accelerated the loss of critical deep water habitats.  These trends have all accelerated over the past 5 years and now we are seeing the effects of rapid habitat decline.  

Unfortunately the river can no longer maintain its characteristic cold water flows as it has become too shallow and impacted with sand.  In 2021, we observed a colder two degree water temperature difference between the M72 gauge and the 4 mile access monitoring station.  During June and July of 2022 that colder 2 degree difference in water temperature was lost and temperatures were uniform between the two gauges.  In recent years water temperatures have fluctuated 8 to 14 degrees over a 24 hour period.  A healthy stream shouldn’t show this kind of temperature profile.  As a consequence we are now seeing significant Didymo growth above the CCC Bridge where it wasn’t found a year ago.

The large swings in water temperatures have been one of the most noticeable changes throughout the watershed.  These big swings in water temperature have had negative impacts upon our insect hatches.  This is the first year I have experienced so much inconsistency throughout the hatch season.  Normally the Hex hatch lasts about two weeks, but the hatch was stretched out over an entire month.  Water temperatures would drop at night to around 58 degrees and climb during the daytime reaching highs of 70+ degrees.  These big temperature oscillations will continue to impact our hatches and disrupt our fishing until the habitat conditions promoting these issues are addressed.

Habitat Decline

Unstable weather patterns had some negative affects on the fishing this year, but that wasn’t the only observable change.  Habitat decline has accelerated over the past 5 years.  Habitat loss has reached a critical threshold and now the river’s ability to buffer against drastic change is losing ground.  The Upper Manistee River has become dominated by expansive wide, shallow, sandy areas of uniform habitat lacking woody debris.  Large areas of shade providing deciduous trees have also been lost to disease and invasive species.  This combination of declining habitat variables is allowing for more light penetration to reach the stream bed.  Habitat decline and a warming temperature profile are two critical changes we are now seeing on an annual basis.  

The Upper Manistee River is becoming warmer as the stream becomes wider, shallower, and more surface water is exposed to sunlight.  During June and July, the longest day length of the year, the river is struggling to maintain colder temperatures under sunny conditions.  Intense solar exposure is winning the battle and we are now experiencing more days with 70+ degree water temperatures.  Water temperatures have still exceeded 70 degrees on sunny days with high temperatures only approaching 75 degrees for the day.  The lowest water temperatures we observed during June and July were typically associated with cloudy conditions and cold fronts.  I firmly believe declining habitat conditions are a prerequisite for Didymo to take over a stream.  

Studies have shown that shallow, wide, cold streams with moderate flows, increased solar exposure, and low phosphorous are more susceptible to Didymo blooms.  Statistically, low phosphorous conditions appear to be the primary driver for Didymo blooms in streams.  Phosphorous is a critical variable in trout streams often impacting algal and macro-invertebrate communities.  When stream phosphorous levels are too high you will often see explosive algal and plant growth.  One would expect to see increasing macro-invertebrate abundances due to increasing nutrient loads, but often there is a subsequent decline in species diversity.  Didymo is a strange case, it prefers ultra low-phosphorous levels to bloom.  This diatom is quite the opposite of most algae and will only show extreme growth in streams when phosphorous levels hit rock bottom.  

Interestingly, phosphorous levels are at an all time low in the Great Lakes Region since the introduction of Zebra and Quagga Mussels.  The post-mussel Great Lakes are functionally different today than the pre-mussel Great Lakes.  Today the Great Lakes are primarily nutrient poor systems characterized by very clear waters which is a 180 degree change from the late 1980’s.  Today nutrient loads are very different, the lakes are exceptionally clear, warm differently, and winter is pretty much a thing of the past.  One has to consider the functional change that has occurred throughout the Great Lakes region and how these changes have impacted our inland ecosystems.  Just a little food for thought regarding the primary driver of change to our regional ecosystems. 

Here to Stay

Didymo has had an immediate impact this season, especially in the sections downstream of the CCC Bridge.  The Didymo mat was very extensive and in some areas we observed over 95% coverage of the hard substrates.  The amount of Didymo particles suspended in the drift from March until Late July was unlike anything I have ever seen.  It was a completely different looking river downstream of the CCC Bridge.  The stream bottom was almost completely covered in Didymo and there was a steady stream of Didymo particles flushing into Hodenpyle pond for over 3 months.  Based on what I saw this spring, I don’t believe we have a very effective strategy in place to prevent this from spreading.  

Insect activity was visibly lower and we observed inconsistencies within our hatches.  Several hatches were virtually nonexistent.  The overall insect activity was the lowest I have ever experienced on the Upper Manistee River.  Didymo also had a tremendous impact upon our trout fishing.  Every section we fished with visible Didymo growth suffered from diminishing returns.  In other words you can’t catch what isn’t there!  We experienced a 65-80% decline in our catch rates and it became very clear that trout Brown Trout are impacted by the presence of Didymo.  There is ample research currently coming out of New Zealand that resembles our own observations.  Studies have documented a 70% decline in Brown Trout biomass within streams affected by Didymo. 

The trout knew it was coming!  Hindsight is 20/20, but I firmly believe Didymo was already impacting fish movement early on in 2021.  In June of 2021 I would argue the river experienced significant fish movement from sections downstream of the CCC Bridge.  We found clusters of large Trout surprisingly pooled up together which is a situation not commonly encountered before.  Other reports from Upper Sections of the river mentioned more large Brown Trout in their catch.  However, I have been finding more large Trout in poor overall condition during the past few seasons, probably resulting from crowded conditions and declining food availability.  Studies in New Zealand have demonstrated larger Brown Trout are adversely affected in Didymo infected streams and those streams were dominated by smaller sized trout (lower biomass).

An interesting observation, that was confirmed by several other guides, was off colored water conditions for several weeks during June of 2021 and again in June of 2022.  The water had a light tannic stain during a long, hot drought period.  Typically the Upper Manistee River would have a gin clear appearance during low water conditions.  Instead the water had a golden brown hue and the surface looked black during low light periods.  Coincidently, Didymo cells are amber or golden brown in color.   In August of 2022 we found significant Didymo growth in sections upstream of the CCC Bridge where the water color was off during June.  It is my belief that these water conditions are a precursor for visible Didymo growth. 

Didymo is a ghost and only becomes visible when it goes into bloom.  In August of 2022 Didymo was discovered on the Boardman River in Traverse City, MI.  It was found in a section that was previously sampled during the spring using rock scrapings.  During the spring Didymo was not found anywhere outside of the Upper Manistee River watershed.  This example demonstrates the importance of expanding our sampling techniques in an attempt to increase early detection of Didymo in our streams.  Currently we don’t have an effective early detection method, this needs to be addressed if we are going to get ahead of this issue.  

A study from New Zealand found Didymo in streams without bloom formations.  In some streams Didymo was present only in the water column and not on the substrates.  In other streams Didymo was present in both the water column and on the substrates, but no bloom formations were found in either case.  The takeaway here is that Didymo won’t bloom unless the conditions to do so are favorable.  Early detection, habitat rehabilitation programs, and an effective mitigation strategy are desperately needed to deal with nuisance blooms in the future.  It’s time to change the conversation and to make the necessary changes to our prescribed management strategies in order to mitigate blooms in previously affected and unaffected streams.  

Solutions

So what does all of this mean and what will happen to the river?  We are not sure, Didymo is a new threat, and the river has gone through a considerable amount of change over the past decade.  Time will tell, but Didymo isn’t going to just disappear.  I would be willing to bet it’s also more widespread than just within the Upper Manistee and Boardman River watersheds.  After reflecting upon the past few seasons, I am even more convinced that Didymo is an indicator of overall poor stream health.  Jon Ray fittingly compared Didymo to Cancer or Diabetes in an unhealthy individual.  I totally agree with his comparison. Until you fix the root cause of the symptoms plaguing a stream, the stream won’t be able to become healthy and balanced again. 

There is potential to avert further blooms on the Upper Manistee River.  The State of Michigan hasn’t actively performed any stream habitat work in several decades.  There have been several other projects that have been completed in that timeframe, but nothing at the scope of what Michigan Trout Unlimited has proposed.  Michigan TU recently placed approximately 200 whole trees between Yellow Trees Landing and King Trout Ranch this fall.  By using Helicopters to precisely drop large woody debris in-stream they were able to target the most diminished habitats in that section.  I am excited to see the results of all this work in the upcoming season!

There are a lot of unknowns regarding Didymo.  Largely, no one has any real answers to its native range or origin.  Is it invasive or a native nuisance species?  What are the environmental conditions that promote large blooms?  How do we treat affected streams and prevent future outbreaks?  These are all important questions that need to be answered, but the fact is Didymo is already here and it isn’t going to just go away.  

Utilizing a holistic management approach and establishing long term monitoring programs should be top on the list.  As we hear more on what you can do to help in this fight and as we find out more information regarding Didymo we will be sure to let you know.   Right now the best thing you can do is voice your concerns with your local State agencies and demand change in how we manage our resources.  Demand more from our resource managers and continue to help out with local projects that can help preserve and protect the future of our favorite trout streams.

Ed McCoy

New Fly Patterns for 2023 

As many of you already know, in 2019 I began selling my signature fly patterns through Montana Fly Company. This year I am excited to announce several new fly patterns that are available through Montana Fly Company in 2023! There will be two new dry flies, a Mouse, and Frog pattern to round out the new releases. The dry flies are an Isonychia Dun and Spinner variation. The Mayfly patterns have been some of my most productive searching and hatch matching patterns over the years.

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Fall Steelhead Manistee River

NRC Proposal New Steelhead Limits

NRC Proposal New Steelhead Limits

New Proposal

There is a new proposal up for consideration by the NRC that would reduce Steelhead bag limits on several sections/streams in Michigan. Here is the NRC Proposal New Steelhead Limits being considered by the NRC. The current steelhead management plan for Michigan needs to be revised to reflect current trends, conditions, and annual adult spawning migrations. We are not opposed to people having the opportunity to harvest a fish even though we practice catch and release. This request for change has nothing to do with gear restrictions and by no means should we dictate how people can legally fish for steelhead. Steelhead populations are in decline and have been on the long slide for over the past decade. Which raises several questions and highlights a need to address and discuss the future of Steelhead management in our state.

Data gaps and changing environmental conditions have muddied the waters, but indicators are everywhere. Anyone that has spent any amount of time on the water can see the changes that have occurred. Which poses several questions. What is the current status of spawning steelhead in our streams? Does the current management scheme reflect what anglers are currently experiencing in their catch rates? Can a declining steelhead population survive added angling pressure with todays current harvest allowance? The MDNR has admitted there is a problem, but currently there has been a failure to act even though there are plenty of red flags.

Little Manistee River

The Little Manistee River Weir boasts the best available data for returning spring Steelhead. This little river is the sister river to the Big Manistee. Albeit smaller in size, it can still shed light on the current trend of Steelhead returns in the Big Manistee River. Since 2002 there has been a significant reduction in Spring Steelhead in the Little Manistee River. The 6 year average from 2009-2014 was 3,433 returning adults and from 2015 to present it was 2,389 returning adults (excludes 2020). In the last 6 years there has been a 30% reduction in average spawning adults. If this trend continues, then what? The spring 2021 returns were the lowest since 1970. More importantly, every year since 2003, the spring steelhead counts have been below the 53 year average of 4,648 adults.

Are we just going to standby and watch our Steelhead populations decline to a point of no return? It’s not far fetched to consider the outcome of 10 more years of decline. The consequences could ultimately exceed the ability of the population to recover. There is a COST TO NO ACTION! Steelhead catch rates are declining statewide as well. Right now this state has a Steelhead catching issue. The proposed rule changes will probably not boost the overall population size, but a declining Steelhead population will not promote productive fishing. This proposal is a good start to a long overdue conversation. Catch Rates, Harvest, and Angler Satisfaction are currently out of balance. We can’t afford to wait for things to get any worse! Now is the time to have a serious discussion regarding harvest limits. What should our annual harvest look like based upon today’s current steelhead population trend? We need to bring the Harvest and Catch Rates back to the middle and rebalance Angler Satisfaction.

Big Manistee River

The close proximity of the Little Manistee River to the Big Manistee River also raises parallel questions. Is there a similar population trend occurring in the Big Manistee River? What about the rest of the Lake Michigan Basin? Is this trend occurring throughout the Great Lakes Region? We believe it is! How can we continue the “Business as Usual” model? To say there isn’t a biological reason to consider a regulation change is a dangerous claim. Just because you have an inherent lack of data doesn’t excuse you from responding to the problem. Changing the regs is a short term fix that will allow more time for data collection. Fully understanding the complexities surrounding the Steelhead population decline will take time. How long will “the data collection” take, 5-10 years? Can we justify waiting that long without taking action? Is it worth risking this popular fishery? Just a little food for thought.

Email NRC

We encourage everyone to email your own letter to the NRC. This is an important issue and if you enjoy fishing for steelhead you should be paying attention. Acting now may avert loosing something that is more than 100 years in the making. Here is the email for the NRC , please send your public comments to this address before November 10th.

Mousing for Trout

Night Fishing

Night Fishing
Mousing for Big Brown Trout

It’s the middle of July and the majority of our hatches are complete. The terrestrial fishing is heating up, our weather is shifting to more humid and warmer days/nights, and the larger fish in our rivers still prefer to hunt at night. Night fishing is a way of life here in Michigan, traditionally it was a quiet pursuit that was only whispered about in the back of a fly shop or amongst anglers that were already in the know. It’s popularity has grown quite rapidly throughout the past decade and Night Fishing has quickly become a popular pursuit among anglers chasing the largest trout of their season. The Night Fishing arena offers a very unique venue and one that offers its own set of challenges with respect to presentation and tact.

Hatches Wind Down

As the Hex hatch winds down a lot of folks will retire for the season and start breaking down their gear and hanging up their waders for the year. In my opinion, this is the time of year that the Night Fishing really takes off and an approach we commonly refer to as “Mousing” provides us with the means to catch sizable trout in the dark. The crowds are mostly gone and food is limiting making for some hungry trout hunting at night. This is our second chance to seek out the larger trout we couldn’t catch during the Hex hatch. Simply put, as much as I love the Hex hatch and the opportunity it provides, I still firmly believe Mousing is your best shot at the largest trout of the year.

Mousing

Mousing is a form of Night Fishing that has gained considerable popularity here in the Midwest over the last ten years. This technique has been around since before my time and has provided anglers with a legitimate chance at a River Dinosaur while utilizing a completely unique time of the day to achieve success. Unfortunately in Michigan we need the darkness to make it work with conviction. Trust me when I say, “the night time is the right time and mousing is a hair raising experience!” Mousing is an aggressive and explosive way to fish, and much like streamer fishing you are targeting the larger predatory trout in a river system.

Fishing on rivers such as the Au Sable, Pere Marquette, and Manistee River will provide anglers with plenty of shots at trophy trout often leaving you on the edge of your seat. As with most fly fishing techniques presentation is very important. Fly placement, casting angle, pace, and moon phase are all primary functions to consider for your success. Understanding all of these critical variables will dictate your outcome and impact your chances for catching larger trout.

Mousing for Trout
Night Fishing in late Summer

Mousing is a searching technique and you want to cover the water thoroughly during each outing. Casting your fly tight to the bank and moving your fly with popping strips while creating a wake behind the fly are important for success. Remember mousing is a game of cat and mouse and you want to keep the fish interested as long as you can in order to elicit a strike.The darkest nights tend to provide the most productive fishing. Knowing when the full and new moon cycles occur will further assist you in determining the best times to go. There are plenty of Lunar Charts and Lunar Apps currently available on-line or for your phones. Having a couple of your favorite Lunar Charts book marked will aid you in planning your next night time adventure. The brighter nights surrounding the full moon tend to be less productive and the fish are often more shy about eating the fly.

Gear

Life is full of lessons and when it comes to fishing in the dark and you should never approach an outing unprepared and under-gunned. When it comes to choosing the appropriate gear and equipment essential to Night Fishing, I have a very short list. First off keep it simple (K.I.S.S). As far as Tippett goes there isn’t a need to get super fancy or overly creative here. I simply use Maxima Ultra Green in 30# for the butt section and I will often taper down to 15# or 12# on the terminal end for a total length of 4-6 feet based upon conditions. However, when it comes to the rod and line I have very specific needs for these categories.

For starters I want a “Big Stick” that can deliver consistent casts over multiple distances.  The Scott Sector 8’10” 7wt and 8 wt rods have been a work horse in my arsenal this season and they are definitely the customer favorite in the boat.  This rod loads quick and is very accurate from short to long casts with flies of varying size.  This rod has tremendous lifting ability which allows you to play fish quickly and confidently, both of which are important aspects to fishing in warmer weather and at night when you can’t see the bottom structure.  The overall performance of this rod has been impressing me with every use from the streamer fishing earlier in the season and especially now casting for giants in the dark.

The Scientific Anglers Frequency Magnum taper lines have been my favorite Mousing line for the past few seasons.  They are available in both Glow and Non-Glow versions.  I come from an old school approach, so NO glow lines in my boat. The line taper is the same in both Glow and Non-Glow versions so pick your poison.  The Magnum Frequency line is a very good choice for casting larger flies.  One thing I find helpful is to over-line my rods with a line that is one line wt heavier, i.e. run an 8wt on a 7wt rod.  By doing this it has greatly improved the short game which is ultimately where most people struggle in the dark.  I have tried a bunch of different lines and tapers, but I keep coming back to the Magnum as it is functionally superior for all my casting needs in the dark. 

Flies

Mice, frogs, Waking Flies, and Gurglers are all examples of fly designs we fish at night, just to name a few. Mice and frogs are pretty self explanatory. Flies that imitate the size, color, and silhouette of your local mammal and amphibian populations found along most river edges are a great place to start when building up your fly selection. Waking Flies and Gurglers are designed to float high and move a lot of water all while creating a very well defined wake.

Having flies that can perform well at the surface interface are very important. Two of my personal favorites are McCoys Mouse and the Amphibious Assault .  However, patience is the most important aspect of Mousing and being patient before setting the hook is really important. Most people pull the trigger too soon on the strike and 9 times out of 10 will fail on the hook set. Having nerves of steel and waiting for the fish to turn on the fly before setting the hook is critical. You won’t catch all of the fish that blow up the fly at night, but much like streamer fishing, you should be able to capitalize on a handful per outing.

Many people are apprehensive about fishing in the dark. Mousing is not for everyone and Night Fishing can be safe and effective as long as you take the time to learn the water you are fishing before the lights go out. Fishing with a friend or a guide is a great way to increase your safety and knowledge of the water you will be fishing. The advantage of fishing in a boat is priceless, not to mention the safety factor compared to wading, but the ability to cover water can make all the difference in the outcome of your trip. If you love to hunt big fish and if chasing Trophy Trout is a passion, mousing can provide the angler with one of the best windows of opportunity to cash in on Michigan’s bigger trout.

Peak times to target trout while Mousing range from July to September. However, there are always exceptions to the rule and opportunities may present themselves earlier or later pending conditions. There really isn’t anything else in the world that can compare to the peace and tranquility of a clear star filled night being violently interrupted by the explosion of a large trout. The intensity of the eat and the anticipation of the next take is what keeps us up all night and by the night’s end it leaves you craving more. When all of your senses are on high alert and the fish are playing there best game with your fly, this is where the addiction becomes reinforced. These are the visions dancing through my mind that keep me up all winter craving/thinking about the next opportunity to take on the darkness in search of the next Personal Best fish.

Ed McCoy

New Fly Release McCoy’s All Day Spinner

McCoy's All Day Spinner
McCoy’s All Day Spinner

McCoy’s All Day Spinner – Isonychia

I am excited to announce a new fly pattern to be released by Montana Fly Company in 2021! The McCoy’s All Day Isonychia Spinner is very durable, has a very realistic profile, can be fished all day, and is a must have pattern for our Northern Michigan streams. This fly will be available in two sizes, #10 and #12, and will complete the Isonychia lineup in a series of foam based dry flies that I released through MFC in 2019.

The All Day Isonychia Spinner is a great searching pattern and is one of my go to favorites to target rising trout during an Isonychia Spinner fall. Make sure to check with your local fly shops for availability and I expect we will have a limited quantity available here online at Mangled Fly. Read more

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