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Clean Angling News
May 2013
Recent Research Provides New Perspectives
Two new research papers released this month provide a better understanding of how invaders may dominate natives.
Scientists who study invasion biology have long assumed that invasive species have some sort of "away-field" advantage that explains why they don't exhibit the same invasive characteristics in their home ranges. The thinking has been that successful invaders do better in a new place because the environment is more hospitable to them. They escape their natural enemies, use novel weapons on unsuspecting natives and generally out compete natives on their own turf by disrupting the balance of nature in their new ecosystems. However, new research suggests that the key to a successful invasion depends less on the environment and more on the individual species doing the invading. Read More

In another groundbreaking study, researchers found thatan invasive lady bug beetle actually eliminates native species because of a fungal spore they carry with them. In effect, they are practicing "biological warfare". Although most invaders don't succeed for this reason, North American crayfish have invaded Europe very successfully in part because they carried a disease that wiped out the locals. Read More


Yellowstone Park Addresses Invasive Species Spread and Impacts
Yellowstone National Park is one of the most pristine environments in North America. It's harsh climate and geographical isolation have helped to protect it from some of the worst invaders. However, Park managers are well aware that there is significant risk of Park waters being invaded. To help reduce the possibility of non-native introductions, Yellowstone has implemented new inspection requirements for boaters wanting to launch in the Park. Read More

The waters of Yellowstone have long been home to several introduced non-native fishes. In particular, rainbow trout, brown trout and brook trout all have the capacity to impact on native cutthroat trout populations. With evidence that some of these non-native trout are spreading rapidly to the detriment of the natives, YNP officials have implemented strict new fishing regulations on selected waters that require anglers to harvest every non-native trout they catch. Read More

In a report that I find very interesting, Park biologists are linking declines in elk populations to the loss of cutthroat trout in Yellowstone Lake. Two invaders,lake trout and whirling disease, have combined to push populations of cutthroat trout to unprecedented low levels in Yellowstone Lake. This has led to a collapse of the huge cutthroat spawning runs that used to provide a major food source to the Park's robust grizzly bear populations. With the trout gone, the bears have shifted to preying on young elk. 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 has begun to limit the number of people who receive our posts. Even 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.

Concerns about invasive species are beginning to impact on fishing tournaments. It is possible that some tournaments may have to be moved or canceled in the future..

Yellowstone National Park has revised their fishing regulations with a goal of increasing native trout populations. To do this they are requiring the kill of non-native trout in many waters.

Northern pike are considered to be invaders in many western waters. Managers are promoting aggressive removal programs but some anglers argue in favor of the pike.

Here is an interesting discussion about the Alaska felt ban.

Utah is reminding all boaters about their rules on cleaning. They include an informative chart on appropriate drying times

A crappie fishing tournament in Pennsylvania proved to be an excellent place to teach about aquatic invasives

There is great fear that the invasive virus that causes infectious salmon anemia will hit the West coast of North America. Is the virus here already?

Colorado fishery managers are considering planting tiger muskies in the Colorado River basin to control invasive northern pike.

Angler Alert - snakeheads are now found in New York City's Central Park - if you catch one don't let it go!

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.

Exxon has spent $100 million developing bio-fuels from algae. Now they are scaling back until they can develop new strains of algae that reproduce faster - potential new invaders?

Invasive lice are posing a significant health problem for native deer populations in California

Goats and sheep have long been used to control invasive weeds. A Colorado woman has developed a technique to teach cows to do the same.

High school students in Massachusetts have produced a 30 minute documentary on invasive species that will soon be featured on TV.

A new record python has been discovered in the Everglades - 19 feet long!

Crazy ants are receiving more attention as they eliminate fire ants in Texas and throughout the South.

The deadly Bd fungus has devastated amphibian populations in the US. New research shows that it likely was introduced with frogs that were once used for pregnancy testing.

The Incredible Shrinking State - Is Louisiana getting smaller because of a nutria invasion?

Once heralded as a great ornamental tree Bradford pear is now considered an invasive.

Millions of dollars of new funding to respond to new invasions?

Researchers mapped more than 2,800,000 ocean transport voyages to develop a new model to predict high risk ports for invasive introductions - this is an important study!

Do you agree that “Florida is the cesspool of the world when it comes to introduced species”?

As amphibian populations worldwide decline, new research shows how an invasive plant triggers changes that lead to loss of native amphibians in the Midwest

Nearly 11 years after discovery, New Jersey has eradicated the Asian longhorned beetle. Is it possible to entirely eradicate them from North America?

May 2013

Although it doesn't seem much like summer here in Montana, there is no doubt that boating season is at hand and across the West, boat inspections are running full speed. We can all appreciate the inspectors who are doing a great job of intercepting fouled boats before they can spread invaders.

While it is great to know that the inspections are effective, we should all be working on making them unnecessary. Each of us needs to take personal responsibility for making sure our boat is clean. If you are not making boat (and boot) cleaning part of every fishing trip now is the time. Cleaning is easy and makes a big difference.

We are featuring a lot of interesting articles this month. They cover a wide range of topics and illustrate how diverse the invasive species problem is. Along with the stories of new invasions, we have some great links to research reports. Whatever your interest is you are likely to find much to consider in this month's list.

In response to many requests, below are links to two of our most popular pages.

Status of US Felt Restrictions

What I Think I Learned at the International Didymo Conference.

As always, we are interested in any invasive species story you know of so be sure to get in touch if you have a story to tell.

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 newsletter@stopans.org.



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The Clean Angling News is regularly produced by the Invasive Species Action Network. If you have questions, suggestions or would like to learn more about invasive species please contact us:

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