My Facebook pages

Robert Montgomery

Why We Fish

Fish, Frogs, and Fireflies

Pippa's Canine Corner 

 

 

Loading..
Loading..
(adsbygoogle = window.adsbygoogle || []).push({});
Loading..
Loading..
(adsbygoogle = window.adsbygoogle || []).push({});
Loading..
Loading..
(adsbygoogle = window.adsbygoogle || []).push({});
Loading..
Loading..
(adsbygoogle = window.adsbygoogle || []).push({});
Get Updates! and Search
No RSS feeds have been linked to this section.

 

 

 

 

Entries in Asian carp (161)

Tuesday
Jun062017

Mild Winter Contributed to Asian Carp Die-Off

A milder than normal winter likely was responsible for the large die-off of Asian silver carp that occurred during April in Kentucky and Barkley Lakes, as well as on the nearby Ohio River.

"It appears that young Asian carp are succumbing to stressors brought on by insufficient fat storage to get the fish through the winter and spring months," reported Kentucky Fish and Wildlife Resources Department (KFWR), crediting scientists with the U.S. Fish and Wildlife Service for the diagnosis.

"Young, but large carp are likely most vulnerable to starvation after a warm winter because the fishes' metabolism was elevated above that of a normal, colder winter."

In other words, the fish couldn't get enough to eat, which weakened them, and made them more vulnerable to secondary stressors, such as bacterial infections that their immune systems normally would fight off.

An Asian carp die-off also occurred in 2014. But Kentucky biologist Jessica Morris said that was in just one place, below Lake Barkley, with gas bubble disease as the diagnosed cause.

"As long as only silver carp are affected (this time), we're going to say that it's a good thing, because that's helping us control the population," she added.

When anglers and boaters began reporting dead and dying fish in early April, biologists from both KFWR and the Tennessee Wildlife Resources Agency (TWRA) were quick to investigate.

“The widespread die-off does not seem to be impacting other fish species, which is good news for game fish and anglers” TWRA fisheries chief Frank Fiss said early in the investigation.  “We appreciate all the reports we have received, and we want everyone to know we are aware of the die-off and are monitoring it.

“While we are trying to learn how to slow or stop their expansion, the recent die-off of thousands of fish for whatever reason has occurred naturally,” he added.

One angler on Kentucky Lake reported dead carp along the banks, as well as distressed fish "moving fast and making a wake, and they were anywhere and everywhere. Many came by the boat and a couple even banged off the trolling motor."

He also saw fish "beach themselves on the bank and that's when we noted why there were so many on the bank."

Another fisherman said the carp  were "swimming lethargically in very shallow water. Then the craziest thing happened. We saw the carp getting really close to the bank and throwing themselves onto the bank. We had never seen them do that before."

Fiss added that most fatalities seem to have been two-year-old fish, "but there are a lot of dead fish, and we are probably only seeing a tiny percentage of what actually inhabits the reservoir."

Wednesday
May172017

A Carp Is Not Just a Carp; Here's the Difference

Many people, including anglers, don't understand that we have several kinds of carp now swimming in our waters, all of them fish from other countries. And all of them problematic in one way or another.

The fish in the top photo is a common carp. It was introduced more than a century ago, with the help of the federal government. It's now in lakes and rivers all over this country, and has degraded water quality in many of them, mostly because it roots on the bottom and stirs up sediment.  State agencies sometimes use a rotenone treatment to wipe out a lake's fishery, primarily because of overpopulation by common carp. When someone says "carp," this is the fish that most people think of.

Grass carp (that's me with an illegally stocked grass carp) were first introduced during the 1960s, to help control aquatic vegetation, mostly exotic milfoil and hydrilla. The problem is that they eat ALL plants, including beneficial native vegetation. Some have escaped and are reproducing in our rivers. More recently, there's concern that they might establish a breeding population in the Great Lakes. They're far too easy to purchase and stock illegally by people who have no idea of the problems that they cause.

Finally, Asian carp. That description applies to both silver (top) and bighead carp. The silver carp is the one that you see so many photos of as it flies through the air. Both are growing larger here than in their native habitat, with bigheads now exceeding 100 pounds. These are the most recent introductions, brought in by fish farmers in the South. They escaped and now are outcompeting native fish for food and habitat in many of our major rivers, most notably, the Missouri, Mississippi, Illinois, and Ohio. In some places, they account for more than 95 percent of the biomass. There's concern that they, too, will establish breeding populations in the Great Lakes.

Thursday
May112017

Grass Carp Invasion Also Threatens Great Lakes Fisheries

 

While silver and bighead are the Asian carp of most concern these days for the Great Lakes, a third species has quietly been making inroads and is a growing worry for fisheries scientists in both the United States and Canada.

"For the first time, we have a binational, peer-reviewed study by some of the best minds and practitioners in the field who have a consensus on what the risk is to the Great Lakes from grass carp, and it's pretty substantial," said Marc Gaden of the Great Lakes Fishery Commission.

The vegetation eaters, which could decimate wetlands and aquatic grasses, have been found in Lakes Ontario, Erie, and Michigan. And, according to researchers, at least some of these invaders are reproducing.

"They've just been humming in the background," he added. "They haven't gotten a lot of attention. Once in a while one would get captured."

In fact, 23 have been caught in Canada since 2012, including five in Lake Ontario at Toronto, according to Becky Cudmore of Fisheries and Oceans Canada.

"Right now, the sterile fish outnumber the fertile fish. This isn't game over, but we are finding more of these fertile fish."

How did they get into the Great Lakes? Possibly through the manmade connection between the Illinois River and Lake Chicago, before electric barriers were erected. Introduced in the early 1960s to control invasive aquatic plants, they been around far longer than their more notorious cousins.

Likely too, some were introduced either intentionally or by accident. Unlike with silver and bighead, grass carp are easy to acquire and have been introduced illegally into both private and public waters by people who don't understand the consequences.

"Our assessment is saying that yes, they were showing up before, but now they're starting the invasion process," Cudmore said. "They have arrived. Now is the time to act."

Monday
Apr242017

Michigan Offers Big Bucks for Best Way to Keep Carp Out of Great Lakes

Want to earn big bucks? Tell the state of Michigan how to keep Asian carp from invading the Great Lakes and possibly decimating the sport fishery there.

The state has allocated $1 million for the global competition, with most of it going toward a prize for the best idea. The rest will be used to publicize and initiate the campaign, expected to begin this summer.

"Somebody out there possibly could have a really good idea," said Joanne Foreman of the Michigan Department of Natural Resources. "Maybe they're not in fisheries or hydro-engineering."

Mary Flanagan with the Alliance for the Great Lakes added, "I think in the fight against Asian carp, there aren't really any bad ideas. We have to try a bunch of different things."

As silver and bighead carp spawn ever closer to Lake Michigan, the last barriers of defense are electronic barriers, but they are iffy at best. Officials fear that smaller fish could pass through them in the wakes of barges. Additionally, the best way to prevent invasion, closing the manmade connection between the Great Lakes and the Illinois River, almost certainly never will happen because of opposition from Illinois, Indiana, and power commercial navigation interests. Finally, the federal government, both under Barack Obama and Donald Trump, seems to see no urgency in developing a plan to keep the carp out.

All the other Great Lakes states, meanwhile, have pressed for years for an effective solution, with about $388 million spent since 2010, mostly by the feds. Those states have good reason to be concerned, too, as sport fishing in the Great Lakes region is worth about $7 billion annually. Michigan's tourism industry alone is valued at about $38 billion, with much of it focused on the outdoors.

Thursday
Apr132017

Feds Stall Even More on Plan to Protect Great Lakes From Asian Carp

What had been a slow walk to better protect the Great Lakes from invasion by Asian carp now has been delayed indefinitely.

The U.S. Army Corps of Engineers had been scheduled to release draft results of a study that it began in April 2015, with intent of structural or technological upgrades  at Brandon Road Lock and Dam on the Illinois River near Joliet. A final version was to be released in 2019. The area is downstream of electrical barriers, intended to repel silver and bighead carp, but which have questionable effectiveness.

But now release of the draft "has been deferred pending further coordination" with government officials and advocacy groups, according to Allen March, Corps spokesman. He added that more consultation is needed "to address things like the range of diverse ecosystems and national economies that could be impacted by outcomes of the study."

In a nutshell, Illinois, especially Chicago, and Indiana oppose any option that would include closing the manmade connection between the river and Lake Michigan or otherwise impede commercial navigation. Fearing what might happen to a billion-dollar sportfishery if the carp enter the Great Lakes, other surrounding states long have lobbied for more aggressive action.

"After a lengthy review process, which included extensive outreach and collaboration with a broad range of stakeholders, it seems that the administration has decided to side with a narrow group of special interests intent on preventing actions to address the movement of Asian carp toward Lake Michigan," said Michigan Sen. Debbie Stabenow.

And Molly Flanagan of the Alliance for the Great Lakes added that "no credible reason" exists for additional delay.

The action was announced after 16 Congressional members, mostly from Illinois and Indiana, sent a letter to President Donald Trump asking for delay until a new assistant secretary of the Army for civil works is appointed.

In a statement, the lawmakers said the Corps "should not hastily recommend a structural alternative that could negatively impact the economy and the safety of towboat crews."

They also pointed out that 5 million pounds of carp have been removed from the Illinois River and argued that the leading edge of the invasion still is well below Brandon Road. But that amount is but a small fraction of the total biomass in the waterway. Additionally, the leading edge of the invasion by mature carp might not be advancing as rapidly as it once was, but the prolific exotics continue to spawn closer and closer to Lake Michigan. And the younger, smaller fish are much more likely to penetrate the electric barriers, possibly riding through in the wake of barge traffic.

Silver carp (top) and bighead carp.Do You Have a Better Idea?

Want to earn big bucks? Tell the state of Michigan how to keep Asian carp from invading the Great Lakes and possibly decimating the sport fishery there.

The state has allocated $1 million for the global competition, with most of it going toward a prize for the best idea. The rest will be used to publicize and initiate the campaign, expected to begin this summer.

"Somebody out there possibly could have a really good idea," said Joanne Foreman of the Michigan Department of Natural Resources. "Maybe they're not in fisheries or hydro-engineering."

Mary Flanagan with the Alliance for the Great Lakes added, "I think in the fight against Asian carp, there aren't really any bad ideas. We have to try a bunch of different things."

As silver and bighead carp spawn ever closer to Lake Michigan, the last barriers of defense are electronic barriers, but they are iffy at best. Officials fear that smaller fish could pass through them in the wakes of barges. Additionally, the best way to prevent invasion, closing the manmade connection between the Great Lakes and the Illinois River, almost certainly never will happen because of opposition from Illinois, Indiana, and power commercial navigation interests. Finally, the federal government, both under Barack Obama and Donald Trump, seems to see no urgency in developing a plan to keep the carp out.

All the other Great Lakes states, meanwhile, have pressed for years for an effective solution, with about $388 million spent since 2010, mostly by the feds. They have good reason to be concerned, too, as sport fishing in the Great Lakes region is worth about $7 billion annually. Michigan's tourism industry alone is valued at about $38 billion, with much of it focused on the outdoors.