September 16th, 2013 by Irene Miles
Recent research indicates that even a handful of Asian carp, between just ten and twenty fish, could establish an ecologically damaging population in the Great Lakes.
From ScienceDaily.com:
“Published this week in the Biological Invasions journal, research from Professor Kim Cuddington of the Faculty of Science at Waterloo indicates that the probability of Asian carp establishment soars with the introduction of 20 fish into the Great Lakes, under some conditions…
‘This species will have a huge impact on the food web,’ says Professor Cuddington. ‘Not only is it a fast-growing fish physically, but the population itself grows very quickly. A female can lay well over a million eggs a year, and with no known predators present in the Great Lakes, the Asian carp could dominate the waters and impact fisheries.’…
Individual fish have already been caught in two of the Great Lakes. The probability of Asian carp establishment changes dramatically if only 10 of the creatures are introduced. With 10 fish, the probability of a population of Asian carp is only 50 per cent, but with 20 fish, it jumps to 75 per cent, under some conditions.”
August 26th, 2013 by Irene Miles
Katherine Touzinsky, a graduate student at Purdue University and 2014 Knauss Fellowship finalist, set out to prove to skeptics that Asian carp really does taste great. The taste test was held in conjunction with the Houston Bowfishing Classic tournament along the Wabash River outside Lafayette, Indiana.
Katherine and Angie Archer, fellowship specialist with IISG, served up tasty fried fish strips which Katherine calls “silvertips”, a wordplay combination of silver carp and wing tips. Many of the bowfishermen have caught Asian carp but had never tried this mild white fish. After watching friends enjoy the crispy fish, they were encouraged to grab a piece. The reactions ranged from “so-so” to “delicious,” with a few coming back for seconds (and even thirds).
The Houston Bowfishing Classic shoots are in their eighth year and are quickly gaining in popularity and notoriety among Midwestern bowfisherman. Katherine’s project, entitled “Winning Back the Wabash—Clean ‘em Out and Cook ‘em Up,” was funded by a Purdue Sustainability Office grant. The goal of the grant project is to help foster environmental stewardship and invasive species control through outreach and active engagement of community members. To help with control, the tournament offered an award to the most silver and bighead carp caught by a team, and another award for the biggest fish (by weight). The 14 teams hauled in 171 Asian carp, with the biggest silver carp weighing in at 11.3 pounds and a bighead carp that weighed 14.5 pounds.
The Dean John A. Knauss Fellowship, awarded annually through National Sea Grant, provides post-graduates the opportunity to work with legislative and executive branches of the U.S. government in Washington, D.C. for one year. Students who have an interest in oceanic and Great Lakes research or marine policies affecting our natural resources are encouraged to apply. For more information, visit the fellowship page on our website.
August 23rd, 2013 by Irene Miles
Back in April, we announced an art contest that asked K-12 students to share their ideas of how Lake Michigan could be protected from Asian carp. The results are now in, and three students in the Champaign area have been crowned the winners.
The awards go to Kylie Jackson, a third grader from Mahomet, and Lindsay Donovan and Nicole Dudley, both kindergarteners from Champaign. Each of their drawings depicts different ways to control the spread of Asian carp by keeping eggs from hatching. Kyle, Lindsay, and Nicole were chosen from 67 entries. Drawings were judged on creativity, artistic design, and relevancy to the topic.
The contest, funded by Illinois-Indiana Sea Grant, is part of ongoing efforts to introduce people to a new modeling tool that resource managers and lawmakers can use to prevent the spread of Asian carp. The model, known as FluEgg, can help decision makers identify where in the Great Lakes the invasive fish could become established. Because carp eggs have to stay afloat to hatch, Asian carp need to spawn in fast-moving streams. In order to thrive in the lakes, they would need access to places where there is a lot of turbulence, such as downstream from dams and spillways. Resource managers can use FluEgg to find those areas where conditions are right and test how effective prevention methods would be.
Developed by University of Illinois researchers Tatiana Garcia and Marcelo Garcia, FluEgg is the first of its kind to consider factors like water temperature and turbulence as well as biological data about early life stages to answer the question of whether Asian carp can become established in the Great Lakes. The model has already revealed that the Sandusky River in Ohio—a tributary to Lake Erie that was though unsuitable for spawning—could be a breeding ground for Asian carp during warm summer months. In the coming months, Tatiana and Marcelo plan to use FluEgg to evaluate more tributaries.
August 21st, 2013 by Irene Miles
Purdue Day at the Indiana State Fair turned out to be a great place for Illinois-Indiana Sea Grant specialists to show off the Asian carp bag toss game. Fair goers of all ages tried their hand at making the shot, and they got to learn more about invasive Asian carp at the same time.
With each throw, Purdue graduate students Zoe Almeida and Allison Hyrcik and IISG specialists Kara Salazar and Angie Archer quizzed the visitors on facts related to Asian carp. Many were eager to learn more and to find out about actions they could take to control the spread of Asian carp.
Attracting close to a million visitors each year, the Indiana State Fair offered specialists the opportunity to talk with Hoosiers from all areas of the state, from the southern border near the Ohio River to the northern part of the state around Lake Michigan. With so many waterways throughout Indiana, visitors to the booth were interested to learn more about invasive species and steps that could be taken to protect the state’s natural resources.
Find out more about invasive species at our website.
August 7th, 2013 by Irene Miles
Researchers at the University of Illinois, working with the USGS and funded in part by Illinois-Indiana Sea Grant, have developed a modeling system that will help manage and prevent the spread of invasive Asian carp.
From Phys.org:
“The model, called Fluvial Egg Drift Simulator (FluEgg), follows a clutch of eggs over time as they travel downstream. Since carp spawn in turbulent waters, they seek places such as dams and spillways. To establish a large population in the Great Lakes, the carp would have to leave the lakes to spawn in the tributaries where the water moves rapidly, usually downstream from dams and spillways, where there is a lot of turbulence. The eggs have to stay suspended in the current to hatch – if they settle on the bottom, they die.
‘The challenge is, of all those million of eggs, how many of those end up hatching?’ said Marcelo Garcia, the U. of I. professor of civil and environmental engineering who led the project. ‘Our challenge has been to find a way to simulate this process from the spawning point all the way downstream. If the eggs are not kept in suspension, they will not be viable and they will die out. We have a model to look at certain streams – like tributaries to the Great Lakes – and figure out whether those streams are potential areas for Asian carp to reproduce. I think we have put together a tool that is going to be eye-opening, to say the least. It’s going to be a lot easier to visualize the transport and the conditions you need for hatching.'”
Read more about the model at the link above, and read about their outreach project here.
July 24th, 2013 by Irene Miles
Senators Mark Kirk (R) and Dick Durbin (D) of Illinois recently passed an amendment that would prevent the Army Corps of Engineers from moving critical invasive species prevention functions out of their current Chicago location .
From CBC News:
“An amendment to the Energy and Water Appropriations bill has passed and prevents the removal of critical functions and staff from the District Office of the U.S. Army Corps of Engineers in Chicago. The Windy City is home of the frontline fight against Asian carp entering the Great Lakes.
Republican Senator Mark Kirk and Senator Richard Durbin, a Democrat, proposed the amendment after U.S. Army Corps of Engineers announced plans to move Chicago district office functions to Detroit.
The senators believe the move, had it been made, would have potentially affected more than 200 employees who oversee projects such as Asian carp electric barriers and Chicago locks and dams designed to keep the invasive species out of the Great Lakes.”
Read the complete article at the link above to learn more.
June 3rd, 2013 by Irene Miles
IISG’s science writer, Anjanette Riley, is at the 2013 International Association for Great Lakes Research conference at Purdue University. She’ll be blogging from the sessions all week providing an inside look at the newest research on the health of the Great Lakes. Here’s today’s post:
“There is more food for Asian carp in Lake Michigan than people thought. In a morning filled with new insights into these invasive species’ biology and potential impact in the Great Lakes, this fact rang the loudest for me. I have read some of the research in recent years speculating that Asian carp could not survive in much of the Great Lakes, which have less of the phytoplankton and zooplankton than the ravenous eaters need. What my fellow session attendees and I learned this morning, though, is that the plankton population has been underestimated. There are more–much more–of the smallest species living in the nearshore waters of Lake Michigan than previously believed.
According to researchers from the Illinois Natural History Survey, the cause of the miscalculation is a common testing method that uses a filter too large to trap many of the microscopic species in the lake. Additional testing measures show that the number of some plankton species found in the lake is roughly the same as in rivers where Asian carp are known to thrive, like the Ohio and Missouri Rivers. And there are plankton species in the lake that are not found in many of these waterways. Taken together, this means that likelihood that Asian carp can make Lake Michigan their home may be higher than previous data has indicated.
The session this morning also taught me that carp will branch away from their favorite dish to eat the particulates from decomposed animals and plants that line the floors of lakes and rivers. These exist in much higher numbers than plankton and their stock is continuously replenished as aquatic matter dies. Although it is still unknown whether Asian carp would choose this food over others (or eat it only when there is nothing else), this could mean that plankton in the Great Lakes may not have to bear the brunt of the carp’s huge diet alone if the invasive fish were ever to take up residence.”
April 5th, 2013 by Irene Miles
The Illinois Department of Natural Resources continues to explore every option to keep Asian carp from entering Lake Michigan, and one of the latest efforts involves distributing new fishing nets.
From The Daily Northwestern:
“In an effort to keep the lake clean, IDNR recently placed orders for brand new fishing nets, which will be distributed to visiting commercial fishermen who may be carrying carp residue beyond the barrier. IDNR often invites commercial fishermen into Lake Michigan so they can catch invasive species, Irons said. But their net residue may be causing inaccurate eDNA tests and ultimately reducing the IDNR’s ability to combat carp invasion.
The new nets will be distributed to fishermen before they cross the electric barrier and are guaranteed to be carp free, Irons said. IDNR is also discussing new methods of cleaning and bleaching fishing boats to reduce the presence of carp slime. Irons cites collaboration with the ACRCC as a huge factor in the ongoing fight against carp.”
Follow the link above for the full story about these and other efforts.
March 27th, 2013 by Irene Miles
Researchers, several agencies, and a variety of industries have grown increasingly concerned that Asian carp DNA recently found in Lake Erie points to the presence of the highly invasive species.
From the Toronto Star:
“‘There are other explanations … for how the DNA could have got there,’ said Lodge. ‘They are possible, but not plausible.’
According to Notre Dame’s Center for Aquatic Conservation, plants and animals shed cellular material (like traces of DNA) into their surrounding environment, and this material can be collected and analyzed. Environmental DNA extracted from water samples can be used to determine if a target species has been in the vicinity.
Asian carp are a group of highly invasive bottom feeders that have infiltrated the waterways of the American Midwest. The fear is they could disrupt Lake Erie’s ecology if they increase to large numbers.”
Follow the link above for the complete article.
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