(Update: because of the anti-Asian hate crimes during the COVID-19 pandemic, government agencies are changing "Asian carp" to "invasive carp." But those who are trying to convince Americans to eat the four invasive species consider any name with "carp" to be unacceptable. Illinois state and partner organizations are working on a new name. But they are still doing market tests. [Chicago Tribune, July 25, 2021, p25]
Nov 2024: I did a Google search but could not find a replacement name for Invasive Carp.)
In Mississippi River Since 1970sA demonstration electric shock barrier was build int 2002 at 1Volt/in, 5 hz, 4 ms. In August 2009, the upped Barrier IIA to 2 Volt/in, 15 hz, 6.6 ms.
East 20% of weight
Only one live Asian carp caught in the CAWS - below barrier.
Extensive fishing and poisoning Over last 3 months - no Asian carp
Nearest viable population is in the Dresden Pool - 41 miles from Lake
Can they establish in Lake Michigan?
Unknown
- 90% of invasions fail--feeding, spawning, temperatures
- Proven to be good at adapting
The Army Corps of Engineers installed a sign that describes the physical barrier between the Des Plaines River and the canal in Lemont. And they have another sign about the barrier in Romeoville.
And they installed a sign on the canal marking the south end of the electric barrier.
Update:
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| Screenshot form Combines Harvesters Threshers posting [They jump out of the water when a board disturbs them. They sometimes damage people in a boat] |
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| Screenshot form Combines Harvesters Threshers posting |
The video taught me that humans don't like them because it is hard to remove the bones. So why not use them for animal feed and/or fertilizer? Fishing them with nets would create jobs.
USFWS video
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| InvasiveSpediesInfo |
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| 19:01 video @ 1:20 Asian Carp Are Disappearing in U S Rivers — The Real Predator Was Unexpected |
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| Cindy bender posted Identifying the locations the "established "invasion" and "presence" fronts... The “invasion front” is the edge where the Asian carp population is dense enough to allow spawning and reproduction has been documented, but recruitment has not been documented. Anecdotal reports suggest spawning but failing to recruit young fish into the population is a common characteristic of Asian carp. Because of this, a third distinction can be made. The edge of the invasion where Asian carp reproduce and recruit regularly will be referred to as the “established front.” The most exterior extent of confirmed capture will be referred to as the “presence front.” At the presence front, densities are low and reproduction is believed to have not yet taken place or has not been documented. The presence front will have densities including only rare fish (one or two captured at a time). Generally, the population at this front is not considered established because densities are thought to be too low to support successful reproduction. Identifying the location and break between the established, invasion, and presence fronts is crucial information for implementation of management or control efforts. |
It seems like you figured out how to resize your pictures. Looks much better.
ReplyDeleteThanks for the comment so that I can figure out how to do comments. Actually, I learned how to crop the pictures. I figured out that the camera takes a picture that is about 3 times larger than an X-Large picture.
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