Asian carp and great lakes

Asian carp is the collective term used in the United States for several species of fish native to Asia. At least 10 species of Asian carp have been introduced outside their native range, and currently four species are considered invasive in the United States: grass, silver, bighead, and black carp. Some carp were introduced intentionally in the s, used in aquaculture facilities to clean algae and snails from the water, but accidental releases also occurred during high waters and flooding. Eventually, different species of carp established a presence in a number of waterways, with bighead and silver carp populations expanding exponentially in the middle Mississippi River. The biggest problem with the spread of Asian carp is that some species are out-competing native fish for plankton and decreasing their populations. Some of these fish, like gizzard and threadfin shad, form the basis of food chains in the rivers that they occupy.
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Asian carp in North America

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Even with DNA Detection, Asian Carp Continue to Evade Scientists

Add a Comment. Save my information. Post Comment. W hen conservation manager Lindsay Chadderton came to the United States from New Zealand to help monitor the movement of invasive species between the Mississippi River and the Great Lakes, everyone was buzzing about one particular intruder: Asian carp. The moniker includes four fish imported from China starting in the s — grass carp, black carp, silver carp, and bighead carp.
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Great Lakes Fishery Commission

Since their introduction years ago, invasive Asian carp have infested rivers and lakes around the United States. In a minute documentary film released today, the National Wildlife Federation visits several sites and meets people who are — and could be — impacted by the fish. Here is that conversation:. Drew YoungeDyke: The mission of the National Wildlife Federation is to unite all Americans to ensure wildlife thrive in a changing world. Part of the change happening in our waters is the introduction of invasive species like Asian carp.
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Four species of Asian carps, bighead carp, silver carp, black carp, and grass carp, are threats to Great Lakes fisheries. Recent peer-reviewed risk assessments for bighead carp and silver carp , and grass carp indicate that the Great Lakes are at substantial risk from these three species. The primary threat from Asian carps is competition with other fish for food resources, and the likely ability of these invaders to outcompete native desirable fishes. The risk from black carp has yet to be evaluated.
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