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Adult grass carps feed primarily on aquatic plants, both higher aquatic plants and submerged terrestrial vegetation, but may also eat detritus, insects and other invertebrates. [ 2 ] [ 5 ] They eat up to three times their own body weight daily, and thrive in small lakes and backwaters that provide an abundant supply of vegetation.
Asian carp is an informal grouping of several species of cyprinid freshwater fishes native to Eurasia, commonly referring to the four East Asian species silver carp, bighead carp, grass carp (a.k.a. white amur) and black carp (a.k.a. black amur), [note 1] which were introduced to North America during the 1970s and now regarded as invasive in the United States.
However, the carp prefer many native species to the milfoil and will usually decimate preferred species before eating the milfoil. In Washington State the success rate of Grass Carp has been less than expected. They were used in 98 lakes and 39 percent of them had no submerged plant life left after only a short time. [12]
Some cyprinids, such as the grass carp, are specialized herbivores; others, such as the common nase, eat algae and biofilms, while others, such as the black carp, specialize in snails, and some, such as the silver carp, are specialized filter feeders. For this reason, cyprinids are often introduced as a management tool to control various ...
The major carp species used traditionally in Chinese aquaculture are the black, grass, silver and bighead carp. In the 1950s, the Pearl River Fishery Research Institute in China made a technological breakthrough in the induced breeding of these carps, which has resulted in a rapid expansion of freshwater aquaculture in China. [ 56 ]
Grass carp Ctenopharyngodon idella: Cultivated 6,068,014 China is the major producer of the grass carp, which grows quickly and requires fairly little dietary protein. Low-cost feed such as grain processing and vegetable oil extraction by-products, terrestrial grass, and aquatic weeds, allows the grass carp to be produced cheaply. [4]
The black carp was first accidentally introduced into the United States during a grass carp shipment from Asia in the 1970s. [8] The black carp was later intentionally introduced to the US in the 1980s for use in retention ponds and aquaculture facilities to manage yellow grub and snails populations. It was also to be used as food fish.
The four dominant fish species known in the United States as Asian carp are introduced invasive species.They all cause harm within their new environments. Specifically, the four most well-known species of invasive Asian carp are black carp (Mylopharyngodon piceus), grass carp (Ctenopharyngodon idella), silver carp (Hypophthalmichthys molitrix), and bighead carp (Hypophthalmichthys nobilis).