Silver, bighead, and grass carps are all invasive fishes referred to as "Asian carp. Asian carp pose threats to aquatic vegetation, food webs, commercial and recreational fishing, and silver carp pose additional threats to human health due to their propensity to leap out of the water when disturbed. Grass carp were originally introduced to the United States in as a method for pond and lake maintenance Mitchell and Kelly and are still stocked and sold in some states.
Several species of heavy-bodied cyprinid fishes are collectively known in the United States as Asian carp. Cyprinids from the Indian subcontinent—for example, catla Catla catla and mrigal Cirrhinus cirrhosus —are not included in this classification and are known collectively as "Indian carp". All the above, except largescale silver carp, have been cultivated in aquaculture in China for over 1, years.
For more information on the Invasive Species Act and Regulations visit www. Asian carps were brought from Asia to North America in the s and 70s. Since then they have migrated north through U.
These carp are native to China. They were originally imported into the southern United States in the s to provide an inexpensive, fast-growing addition to fresh fish markets. They also served to help keep aquaculture facilities clean. By the carp were found in natural waters in the Mississippi River Basin.
Dear EarthTalk : What exactly are Asian carp, and why are they such a big problem lately? Introduced in the southeast to help control weeds and parasites in aquaculture operations, these fish soon spread up the Mississippi River system where they have been crowding out native fish populations not used to competing with such aggressive invaders. Asian carp are hardy, lay hundreds of thousands of eggs at a time and spread into new habitat quickly and easily.
Though all are fast growing and prolific feeders that out-compete native fish and can leave a trail of environmental destruction in their wake, the four species of Asian carp do not impact the underwater environment in the exact same ways. Grass carp present significantly different risks to the ecosystem compared to highly invasive bighead carp and silver carp. For more information on the differences between the four species, please refer back to our species pages.
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 carpand 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.
Carp are a family of fish native to Europe and Asia. The common carp Cyprinus carpio has been in the US for over years. The newest carp invaders, bighead carpblack carpgrass carpand silver carp collectively known as "Asian carp"however, are causing their own brand of trouble in the Mississippi River and rivers and lakes within the Mississippi rivershed.
As Canadian and American authorities race to stop the northward march of the Asian carp, Global News looks back at the history of the foreign fish in North America. The filter-feeding carp were ideal for keeping the farms clean. Two carp species, the bighead and silver, escaped after flooding and started making a new home in the Mississippi River basin.