Clean Angling News
October 2014
The Cost of Invasion
We all know that there are significant economic costs associated with invasive species impacts and control. While many people focus on the ecological damage that invasions can produce, the economic impacts are driving the funding for invasive species programs. There are lots of examples of how the cost of daily activities increases following invasion and there recently have been a couple of stories that highlight these impacts.

Since 2007 Quagga mussels have been impacting the management of water in the lower Colorado River. California's Metropolitan Water District is now spending 3-5 million dollars annually to clean water delivery systems. This economic impact could be dwarfed if the drought the area is experiencing continues. Read More

According to a 2007 survey, feral hogs are costing the US at least $1.5 billion per year. However, the pigs are expanding their range rapidly and the impacts are growing. To help in the fight, the US Dept. of Agriculture has created a $20 million per year program to control the hogs. For a great overview of the feral hog problem read this excellent article from Scientific American  Read More

Tracking the spread of an Invader
Once a species is introduced how does it spread? While we may think we have some of the answers to this question, our assumptions are usually based on experience and observation, not measurable data. A new research paper from Washington University in St. Louis provides  insights into the spread of one invader.

Native to Southeast Asia, the Asian tiger mosquito (Aedes albopictus) showed up in Houston, Texas, in 1985. By 1986 it had reached St. Louis, Missouri, and Jacksonville, Florida. Thus, in a single year, the insect moved many hundreds of miles. This is quite a feat when you consider that these are poor flying insects and an adult will travel less than a kilometer in it's lifetime.

To better understand the movement of this invader the researchers turned to the new field of Landscape Genetics to see if they could determine how the mosquito spreads. They developed a clever technique of sampling flower vases in cemeteries which trap and hold water and provide ideal habitat for juvenile mosquitoes. Their findings help to shed some light on the movement of this invader and their work offers suggestions for managers. Read More

Previously Posted on Facebook
We review news stories on a daily basis and post stories of interest on Facebook as we find them. However, we know that many of you are not using Facebook so here are the links we posted during October on our Facebook pages.

******* A reminder to those who follow us on Facebook: Facebook is limiting number of people who receive our posts. If you have liked our Facebook page you may not be getting our posts in your news feed. The only way to make sure you are seeing our posts is to visit our page to see all of the content we publish.

Our Clean Angling Facebook page is where we post links that deal with fish, fishing, cleaning, boat inspections, and other issues of interest to anglers.

Lake Erie used to support one of the finest recreational fisheries in the country. It is sad to see it in this condition

Here is a great page to follow if you are concerned about the native Yellowstone cutthroat trout in Yellowstone Park

Fishery biologists currently use chemicals to kill non-native fish when they want to restore native species. New Montana research shows that removal through electrofishing may be a better alternative

On our Invasive Species Action Network Facebook page we post all types of invasive species news including stories about all types of invaders, policy issues and other items of interest.

Are you looking for a new hobby? Some divers in the Caribbean think that spearing lionfish and hand feeding them to sharks is great sport 

California is seeking nominees for service on the California Invasive Species Advisory Committee - this is a great opportunity if you want to make a difference

Do you ever wonder how invasives get to the US in the first place? Read this story about the invaders that were discovered at a single border crossing during a recent 3-day period

With media alarms being raised about the discovery of quagga mussels in the UK, many are wondering if there is a real cause for concern. This article examines that question and says the concern is real

This past summer much of the US became aware of the serious problem caused by the toxic algal bloom in Lake Erie. While elevated nutrients is a serious problem, invasives are making things worse

Many people are unaware that freshwater jellyfish even exist, let alone that they can be invasives. They are established in Wisconsin and are slowly spreading

Although quagga mussels have been causing problems in North America for years, the United Kingdom has avoided their introduction - until now! 

New research shows that despite the massive invasive mussel infestation in the Great Lakes, there are still pockets where native mussels are thriving 

Invasive crayfish are a well recognized threat to stream ecosystems in North America. However, invasive crayfish also threaten European waters - this time they come from the USA

There is big trouble in New York where there is a bitter fight between those who want to control invasive swans and those who love them

Stinkbugs have been steadily spreading from Pennsylvania where they were first discovered in 1998. Each year they extend their range and in the fall they move indoors and become a noticeable pest

Congratulations to these folks for finding a great new way to utilize an invasive species! Apple snail candles could be the perfect Christmas gift.

Montana has been fighting invasive bullfrogs since they were first discovered. Unfortunately, they have continued to expand their range and now inhabit more than 60 miles along the Yellowstone River

Zequanox s the non-chemical treatment for zebra mussels that has a lot of potential. In lab tests the compound has proven to be an effective mussel killer. Now there is news about a field test in Minnesota

Our Forest Pest Fly Tying Project Facebook page provides information for anyone concerned about the spread of forest pest insects. Visit the page and join the conversation about the problem and our unique fly tying program.

Climate change will have significant impacts on invasive pests in our forests. Read how the Southern pine beetle is threatening northern forests

Until now we have believed that the emerald ash borer will only attack ash trees. However, There is new evidence that they may find other trees attractive

Read about the new firewood campaign that just launched to protect the Great Smoky Mountains National Park

October 2014

  One aspect of invasive species that has changed significantly in recent years is the level of awareness in the public. Just a few years ago it seemed that most people were totally unaware of the threat that invasives pose. We have see a real change and today most people I meet have their own tales of being impacted by an invader.

    We need to build on the success we've had in building awareness. Teaching people that invasive are a problem is a great start but we really need these same people to change their behavior so they reduce the risk that they may be transporting invasives. Lets all make sure that we include messages about how individual can help whenever we talk about the invasive species problem.

  Last month we asked you for a couple of minute of your time to complete a short survey. Thanks to all of you who have participated. Your feedback matters and we will try to use it to deliver you the best newsletter we can. If you did not have a chance to take the survey yet we are leaving it open for a couple more weeks. Take the survey

  Although there have been no new felt restrictions recently, we continue to get more questions about felt bans than just about anything else. The Status of US Felt Restrictions page is where we track every felt ban or proposal that we know of. At this time we do not know of any additional restrictions under consideration but that can change at any time and we update the page every time we get new information.

  I hope you will get in touch with me if you have questions or invasive species stories to share.

Bob Wiltshire
Executive Director ISAN

The Clean Angling News is published monthly by the Invasive Species Action Network. Please send comments, questions and complaints to

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