


March 12, 2013
Invasive Species: Concerned About Rock Snot
By Kirk Deeter
I am in Providence, Rhode Island, attending the "International Didymo Conference," where scientists and policy experts from around the world have gathered to talk about this aquatic invasive species. If you're not familiar with the diatom Didymosphenia geminata, you should be. "Rock snot," as it is often called, has the ability to spread quickly. For example, since the first blooms of this alga were detected in one river on New Zealand's South Island in 2004, it has infiltrated many other major river systems there (fortunately it has not spread to the North Island). And it's a growing concern here in the United States as well.
In a nutshell, this gunky, globby goo stifles rivers, essentially suffocating invertebrates (what trout eat), and the effects on the fish themselves are still unclear. Flushing flows in rivers below dams can alleviate the problem, but didymo tends to grow back quickly. Of all the potential invasive threats to our already fragile trout streams and rivers, this one ranks high on the list. It's part of the reason why some states have enacted felt sole bans on wading boots.
But I have to wonder if banning felt can really have a significant, lasting impact. I sometimes think that those of us who have sworn off felt (or have been made to do so) consider that a cure-all, when in fact the bottoms of our boots are only part of the issue. Organisms can survive (and be transported) in many fabrics.
Be honest with me. How thoroughly do you really wash or freeze your wading boots, if you do so at all? I would estimate that 75 percent of anglers think they are doing the right thing. Based on what I am learning here, however, I'd say that less than 25 percent are actually doing a thorough job of cleaning or freezing boots in a way that can really reduce the threat spreading invasive species. Sadly, I think I'm probably one of those anglers stuck in the middle somewhere.
We clearly need more information. Not the detailed science, rather the basics on "what it is, why it matters, and what we can do about it." The Invasive Species Action Network is a good place to find the straight scoop on didymo and other invasive threats, and I strongly encourage you to check out that website before you lace up and start fishing this spring.
Comments (11)
Maryland has banned felt and has wader cleaning stations at different locations along the river. The stations are tubs with scrub brushes hanging near for fast cleaning. The felt ban forced me to buy a pair of Simms wading boots with star cleats. Even though it was just Maryland who banned felt the ripple effect is I no longer wear felt in any other state. I like my star cleats better than felt.
Other than the cleaning stations I have never cleaned my boots or waders.
I have come up with a thought. I wonder if the fishing club I belong to can have a boot cleaning day which coincides with our monthly fly tying or rod building classes? Or better yet, invade the local pub in full river outfits to raise awareness and have them cleaned in a bar. Umm, anything for a drink.
Indeed MD does have the wader cleaning stations but they are usually empty. I still see some guys wearing felt every year and never see anyone get caught for it. Luckily I have not come across "rock snot" in my fishing yet.
Scientists have got to come up with the eradication not the angler washing his boots. Somewhere along the line there came a fork in the road, and commonsense went one way, and those advocating scrubbing down took the other path. Simms went back to selling felt, and our flyshop ran a good size ad in the local paper.."SIMMS FELT BACK IN STOCK!" I even called lodges in Alaska, and all of them said the ban on felt was a farce. And the rubber substitutes don't work, and have been severely criticized by those who bought them.
I wear rubber soles and wade cautiously. I'm not terribly optimistic it matters, but do it anyway.
The question I'd ask is what's the effect of spreading AIS through transferring/pumping water? Most of CO's water is sent through a series of reservoirs and pump stations and open channels (called rivers or creeks). Does that spread algae/larva too?
It's a crapshoot. What about non-anglers and their water shoes/sneakers? The bottom of a kayak, sandals, anything that touches the water can spread the algae.
It can't just be the industry and angler community stepping up to the plate. It starts with education and awareness, all of which needs to be directed to everyone that spends time in our waters for recreation.
One example: When a river trip outfitter (inner tubes, rafting, canoe etc.) gives their required safety speech to a party of rafters, include a 3 minute river stewardship talk that covers didymo, leave no trace/carry in-carry out, leaving stream banks alone etc. And yes, it needs to be required because outfitters don't and will not do it on their own. They could care less. Living near the Upper Delaware, I see the neglect and ignorance all the time.
It needs to be eradicated. How about animals, birds carrying it. Forget about the angler safety measures...doesn't work, and punishes the fishing industry.
I have not seen any official boot cleaning stations on the streams I fish in VA. The DGIF does mention it on its website, but the areas I tend to visit are headwaters, rather far off the beaten path, and probably even more prone to "rock snot" given their limited flows. All of the guys I fish with have abandoned felt( not only for didymo, but it doesn't hold up well to a 3 mile hike into the national forest.) The only cleaning station I have seen was set up by other anglers in a common parking area in the national forest. Just proof that awareness is key.
My thought about canoe and kayak outfitters is they use the same equipment on the same water, day after day. Other casual river users usually do not jump from river to river. My waders can see dozens of streams in many different states over a one month period. Waders and boots are a good place to start.
Curious to know if ducks and geese are known to carry didymo.
That's a good point, buckhunter. Well, they can leave the didymo part out of their river stewardship segment.
There's also kayak/canoeing organizations and clubs that will hit many different bodies of water in a season. It might take a state agency and that industry sector to collaborate on educational outreach. Especially with kayaking as a "sport" growing in popularity. There's certainly no downside to spreading the good word about individuals doing their part to care for our waters. But who knows, maybe they're already part of the discussion. I have no idea.
I got to talk to the TU project manager last nite at the TU meeting. Great nite for me. I got to watch Bob Jacklin tie 3 flies to be raffle awarded at the end included as part of a prize, and then Bob put on a historical presentation of places, and famous people and anglers during his long, and storied career in West Yellowstone. He came out West from NY as a 22 yr. old and guided for Bud Lilly, did taxidermy work, and tied flies before buying a samll shop on the dirt road strip. What stories, and pictures. Had pictures of his fishing with Lee Wulff. AT some point pictures, rods and relics will be donated as museum pieces. But back to the TU employee....IF your river has a problem, and you will be fishing another waters, then good idea to wash with 409.
Didn't mention my discussion with the TU project manager about rock snot.....good to wash your boots with 409 IF your water has a known problem, and you will be headed off to fish another water. OK, I'll buy that.
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Maryland has banned felt and has wader cleaning stations at different locations along the river. The stations are tubs with scrub brushes hanging near for fast cleaning. The felt ban forced me to buy a pair of Simms wading boots with star cleats. Even though it was just Maryland who banned felt the ripple effect is I no longer wear felt in any other state. I like my star cleats better than felt.
Other than the cleaning stations I have never cleaned my boots or waders.
I have come up with a thought. I wonder if the fishing club I belong to can have a boot cleaning day which coincides with our monthly fly tying or rod building classes? Or better yet, invade the local pub in full river outfits to raise awareness and have them cleaned in a bar. Umm, anything for a drink.
Indeed MD does have the wader cleaning stations but they are usually empty. I still see some guys wearing felt every year and never see anyone get caught for it. Luckily I have not come across "rock snot" in my fishing yet.
It's a crapshoot. What about non-anglers and their water shoes/sneakers? The bottom of a kayak, sandals, anything that touches the water can spread the algae.
It can't just be the industry and angler community stepping up to the plate. It starts with education and awareness, all of which needs to be directed to everyone that spends time in our waters for recreation.
One example: When a river trip outfitter (inner tubes, rafting, canoe etc.) gives their required safety speech to a party of rafters, include a 3 minute river stewardship talk that covers didymo, leave no trace/carry in-carry out, leaving stream banks alone etc. And yes, it needs to be required because outfitters don't and will not do it on their own. They could care less. Living near the Upper Delaware, I see the neglect and ignorance all the time.
I have not seen any official boot cleaning stations on the streams I fish in VA. The DGIF does mention it on its website, but the areas I tend to visit are headwaters, rather far off the beaten path, and probably even more prone to "rock snot" given their limited flows. All of the guys I fish with have abandoned felt( not only for didymo, but it doesn't hold up well to a 3 mile hike into the national forest.) The only cleaning station I have seen was set up by other anglers in a common parking area in the national forest. Just proof that awareness is key.
My thought about canoe and kayak outfitters is they use the same equipment on the same water, day after day. Other casual river users usually do not jump from river to river. My waders can see dozens of streams in many different states over a one month period. Waders and boots are a good place to start.
Curious to know if ducks and geese are known to carry didymo.
That's a good point, buckhunter. Well, they can leave the didymo part out of their river stewardship segment.
There's also kayak/canoeing organizations and clubs that will hit many different bodies of water in a season. It might take a state agency and that industry sector to collaborate on educational outreach. Especially with kayaking as a "sport" growing in popularity. There's certainly no downside to spreading the good word about individuals doing their part to care for our waters. But who knows, maybe they're already part of the discussion. I have no idea.
Scientists have got to come up with the eradication not the angler washing his boots. Somewhere along the line there came a fork in the road, and commonsense went one way, and those advocating scrubbing down took the other path. Simms went back to selling felt, and our flyshop ran a good size ad in the local paper.."SIMMS FELT BACK IN STOCK!" I even called lodges in Alaska, and all of them said the ban on felt was a farce. And the rubber substitutes don't work, and have been severely criticized by those who bought them.
I wear rubber soles and wade cautiously. I'm not terribly optimistic it matters, but do it anyway.
The question I'd ask is what's the effect of spreading AIS through transferring/pumping water? Most of CO's water is sent through a series of reservoirs and pump stations and open channels (called rivers or creeks). Does that spread algae/larva too?
It needs to be eradicated. How about animals, birds carrying it. Forget about the angler safety measures...doesn't work, and punishes the fishing industry.
I got to talk to the TU project manager last nite at the TU meeting. Great nite for me. I got to watch Bob Jacklin tie 3 flies to be raffle awarded at the end included as part of a prize, and then Bob put on a historical presentation of places, and famous people and anglers during his long, and storied career in West Yellowstone. He came out West from NY as a 22 yr. old and guided for Bud Lilly, did taxidermy work, and tied flies before buying a samll shop on the dirt road strip. What stories, and pictures. Had pictures of his fishing with Lee Wulff. AT some point pictures, rods and relics will be donated as museum pieces. But back to the TU employee....IF your river has a problem, and you will be fishing another waters, then good idea to wash with 409.
Didn't mention my discussion with the TU project manager about rock snot.....good to wash your boots with 409 IF your water has a known problem, and you will be headed off to fish another water. OK, I'll buy that.
Post a Comment