Entries in carp (7)
Pythons are wiping out wildlife in the Florida Everglades.
Here’s an excerpt from an article in the Tampa Bay Times:
“In a report published Monday, a team of scientists said they found that between 2003 and 2011, the areas where pythons had proliferated saw a 99 percent decrease in raccoons, a 98 percent drop in opossums, a 94 percent drop in white-tailed deer and an 87 percent falloff for bobcats. And that's not the worst of it.
“‘We observed no rabbits or foxes,’ the report noted.
“The bottom line: ‘In areas where pythons have been established the longest … mammal populations appear to have been severely reduced.’"
Of course, pythons are an exotic species that should not be in the Everglades. They are present because of the federal government’s failure to competently regulate the exotic pet industry.
Just add water and you get an idea of what could happen to our fish and other aquatic species because of exotic carp, snakeheads, gobies, and other invaders.
Granted, the snakehead is the only top-level aquatic predator so far --- as is the python on land --- but exotics can wipe out natives through means other than eating them. They can take over habitat and gobble up all of the food. They can introduce disease. In rare cases, they even can interbreed, weakening the genetic integrity of natives.
The truth is that established populations of invasives can have consequences that we can’t even contemplate until it’s already too late.
Just before Christmas, some invasive species experts wrote their own version of the “Twelve Days of Christmas.”
As reported by the Journal Sentinel, here’s a portion of the song intended to increase awareness about exotic species and the problems that they create:
"On the 12th day of Christmas, a freighter sent to me,
"Twelve quaggas clogging: Quagga mussels, which can tolerate colder water than zebra mussels as well as colonize soft substrates, are now the dominant invasive mussel in Lake Michigan. Just like zebra mussels, quagga mussels are quite effective at clogging water intake pipes and other infrastructure. Mitigating these impacts has cost Great Lakes residents millions of dollars.
"Eleven gobies gobbling: Round gobies are very effective egg predators. Their advanced lateral line system (a series of fish sensory organs) allows them to find eggs that native egg predators are unable to.
"Ten alewives croaking: Until the introduction of Pacific salmon, alewives died off in such great numbers that tractors were required to remove them from Lake Michigan beaches. Salmon now do a great job controlling alewife numbers, but there are still alewife die-offs due to spawning-related stresses.
"Nine eggs in resting: The spiny waterflea and the fishhook waterflea produce tiny resting eggs that can survive long after the mature waterflea has perished. The resting eggs also can survive extreme environmental conditions, so it is imperative to make sure recreational equipment is cleaned to prevent spreading these invasive crustaceans.
"Eight shrimp 'a swarming: The bloody red shrimp, Hemimysis anomala, is one of the Great Lakes' most recently discovered ballast invaders. The effects on the Great Lakes are largely unknown, but the shrimp may compete for food with young fish and have been found in the diet of some fish in the Great Lakes.
"Seven carp and counting: There are seven species of invasive carp in the United States. There are the four collectively known as Asian carp (black, grass, silver and bighead), the common carp, the crucian carp, and last but not least, the Prussian carp (aka the goldfish). While the current focus is on the silver and bighead carp, all of these carp cause problems one way or another. Hopefully, we won't actually be counting any other carp species soon.
"Six lamprey leaping: This is actually some bad lamprey biology humor. Lampreys are poor jumpers, especially when compared with trout and salmon, so a small low-head obstacle or ledge can prevent lampreys from moving farther upstream while other fish leap over the obstacle. Thus, physical barriers or one-way managers are preventing lampreys from invading more streams in the Great Lakes basin.
Hey, it's National Invasive Species Week in Washington, D.C. Isn't that great?
And, even better, Thursday is Invasive Animal and Pathogen Day. Where can I buy the tee shirt?
During earlier times, many invasive species, such as the common carp, became established before we realized the dangers of introducing non-native species into our ecosystems. That's not the case anymore.
But while the feds always are looking for more ways to control our lives --- including telling us when and where we can fish --- they still refuse to take the actions needed to control this never-ending invasion. For example, with Asian carp about to invade Lake Michigan (if they haven't already), the feds are going to study the issue for five years. Meanwhile, an electric barrier, with questionable effectiveness, is doing just fine, the Corps insists, although it won't reveal the data that confirms that assertion.
The invasion that we're celebrating is brought to us by commercial navigation (ships from other countries gave us zebra mussels, round gobies, and hundreds more in ballast water), aquaculture (those great folks who brought us Asian carp), the pet industry (Burmese pythons and more than 30 fish species now inhabiting Florida waters), and the plant/nursery business (water hyacinths, Giant salvinia, to name just a couple).
And nothing truly will be done about this ever-escalating problem until citizens --- including activist anglers--- hammer their elected representatives hard enough to force them to shut off the entryways for invasion.
Now, Mother Nature Network is providing us with additional options, including recipes for such delicacies as American cannonball jellyfish and brassica rapa. Check these out and eat up!