Bighead carp
| Bighead carp | |
|---|---|
 |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Cypriniformes |
| Family: | Cyprinidae |
| Genus: | Hypophthalmichthys |
| Species: | H. nobilis |
| Binomial name | |
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Hypophthalmichthys nobilis (J. Richardson, 1845) |
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| Synonyms | |
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Aristichthys nobilis |
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Aristichthys nobilis
The bighead carp (Hypophthalmichthys nobilis) is a species of freshwater fish, one of several Asian carps. It is one of the most intensively exploited fishes in aquaculture, with an annual worldwide production of over three million tonnes in 2013, principally from China.
The bighead carp has a large, scaleless head, a large mouth, and eyes located very low on the head. Adults usually have a mottled silver-gray coloration. It is a large fish; a typical length is 60 cm (2 ft), and maximum observed size of 146 cm (4 ft 9 in) and 40 kg (88 lb).
Bighead carp are native to the large rivers and associated floodplain lakes of eastern Asia. Their range extends from southern China north to the Amur River system, which forms the border between China and Russia. They have been introduced widely outside their native range, including the United States, and they are often considered invasive.
The bighead carp has a very fast growth rate, which makes it a lucrative aquaculture fish. Unlike the common carp, bighead carp are primarily filter feeders. They preferentially consume zooplankton, but also phytoplankton and detritus.
The bighead carp is an important species in aquaculture, having the fifth-highest production (7.5%) of all cultured freshwater fish worldwide. Its production grew from just 15,306 tonnes in 1950 to 3,059,555 tonnes in 2013, most of the growth being in China.
The value of bighead carp as a food fish has caused it to be exported from its native China to more than 70 other countries, where it has invariably escaped or been intentionally released to the wild. Today, the bighead carp can be found in the wild in Europe, South America, and North America. It also has been introduced into most of the Indian subcontinent (India, Pakistan, and most Southeast Asian countries) and to lakes in western China to which it is not native. Bighead carp are not always considered undesirable, invasive species where they are introduced outside their native range, and they continue to be stocked in some water bodies to support commercial fisheries. Stocking bighead carp or silver carp usually increases the total biomass of fish available for harvest, but can decrease the catch of native and sometimes more valuable fish.
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Wikipedia