Carp Lemonade

Making the best out of some big-headed invaders.

You've probably heard the adage,"When life gives you lemons,make lemonade!" Missouri has been given some lemons in the form of bighead and silver carp. These large, plankton-eating fish, native to Asia,were imported into Arkansas in the 1970s to control water quality in fish farms and sewage treatment facilities. It didn't take long for the fish to escape to the wild, and their populations have been increasing ever since.

The Mississippi River and its tributaries were excellent highways for bighead and silver carp, allowing them to expand their range as far as Louisiana, South Dakota and Ohio.

In Missouri they are plentiful in the Missouri and Mississippi rivers. People using nets have taken more than a ton of large Asian carp from the calm area behind a single wing dike on the Missouri River. We don't know yet what the effect these exotic carp are having on native fish, but we are concerned they may have an impact on populations of native plankton feeders like paddlefish and gizzard shad.

A more immediate threat to Missourians is the possibility of Asian carp, especially silver carp, jumping into moving boats. You may imagine it would be quite novel for a 20-pound fish to jump into your boat, but being hit by a large Asian carp would be similar to being hit by a bowling ball.

When you add the speed of the boat to the force of impact, the threat of collisions become even more serious--possibly deadly. Even if the fish don't hit you, they can break fishing rods, windshields, electronics or anything else in your boat. As if adding insult, the carp will leave slime, blood and excrement on everything it touches.

The Missouri Department of Conservation and the U.S. Geological Survey are studying the threat of Asian carp and hopes to develop some methods to control the populations of these fish. Until then, they are like lemons that we have to deal with.

Fortunately, bighead and silver carp have a redeeming value: Their meat is absolutely delicious. I have eaten them pan-fried, deep-fried, grilled, baked, steamed, smoked, in curries, in soup and even pickled. They are delicious when prepared in any of those ways.

Don't believe all carp taste the same. There is no comparison between the firm, white, flaky meat of bighead and silver carp and the darker, strong-tasting meat of common carp. Silver carp also happen to be a better source of Omega-3 fatty acids (the "good chloresterol") than salmon.

The only drawback to eating bighead and silver carp is that they have lots of intramuscular bones. All carp have these Y-shaped bones. They remain in the fillet in two rows, one above and one below the lateral line. A carp fillet also contains a strip of red meat along the lateral line. This should be removed, much like the "blood strip" of a striped bass or white bass.

By the time you clean a bighead or silver carp, the remaining fillets will only be about 20 to 25 percent of the weight of the fish you caught. However, because these fish are so large and plentiful, you can still put a large amount of high-quality meat in the boat. For example, 150 pounds of silver carp jumped into my boat one day. After cleaning, I had 30 pounds of great meat.

Scoring the fillets of some "bony" fish chops up the bones. If you then fry them in very hot oil, the bones dissolve to the point that you don't notice them. Scoring, however, does not work with Asian carp larger than about 2 1/2 pounds because the bones will be too large.

The fish we catch on the Missouri River average between 12 and 15 pounds. The Y-bones on a 15-pound Asian carp can be up to 4 inches long. These are much too large for scoring, but they are large enough that you can easily remove them from the cooked flesh. Take care to not cut through the bones when cleaning the fish because that will simply make the big bones into lots of little bones that are annoying or even dangerous. triangle

About This Article

Author

contributor Research Fisheries Biologist Duane Chapman is employed by the U.S. Geological Survey. He has been working in fisheries since 1980. Duane lives in Columbia with his family of five. He is an avid fisherman, with a life-list of 216 species caught by hook and line.

Photos

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Silver carp (top right photo - left fish) and bighead carp compete for plankton with native paddlefish and gizzard shad.

Adult bighead and silver carp might weight more than 50 pounds.The sound, vibration or turbulence caused by boat motors seems to stimulate them to jump out of the water. Sometimes they land in boats