Raphc a écrit :
Si quelqu'un trouve la raison de la carpe volante.
Les truites le font pour manger et se deparasiter. Peut-etre est-ce simplement un reflexe pour echapper a un eventuel predateur comme pour les poissons volants.
"Silver carp may also be referred to as flying carp because of their
tendency to jump from the water when disturbed.
SCIENTIFIC NAME: Hypophthalmic molitrix
Silver carp is in the family Cyprinidae, the minnow and carp family. The genus Hypophthalmic is made up of the Greek word “hypo” meaning “under”, the Greek word “ophthalmos” meaning “eye” and the Greek word “ichthys” meaning “fish”. The silver carp was first named by Valenciennes in 1844.
DISTRIBUTION: The silver carp’s native range includes the major Pacific drainages in eastern Asia from the Amur River in Russia to the Pearl River in China. Its current United States distribution includes Alabama, Arizona, Arkansas, Colorado, Hawaii, Illinois, Indiana, Kansas, Kentucky, Louisiana, Missouri, Nebraska, South Dakota, and Tennessee.
Indiana:
In Indiana silver carp have been found in the Wabash River south of Lafayette and along the Ohio River, as well as the West Fork of the White River.
DESCRIPTION: The silver carp is a deep-bodied fish that is laterally compressed. They are a very silvery color when young and when they get older they fade from a greenish color to silver. They have very tiny scales except the head and the opercle that are scaleless. They have a large mouth without any teeth in the jaw but they have pharyngeal teeth. Its eyes are situated far forward on the midline of the body and are slightly turned up. The max total length of a silver carp is 3.5 feet and the max weight is 100 pounds. The silver carp most similarly resembles the bighead carp but the silver lacks any small irregular dark blotches like the big head and the silver carp has fused gill rakers that are sponge-like.
PATHWAYS/HISTORY: First introduced into the United States in 1973 a fish farmer used silver carp in his Arkansas ponds to control the levels of phytoplankton. By the end of the 1970’s some state, federal and private facilities as well as sewage lagoons had been stocked with silver carp. It didn’t take long for silver carp to be detected in natural waters. In 1980 individuals were found in natural waters. Silver carp can be found in the natural waters of Alabama, Arizona, in the Mississippi River mainstream in Arkansas, in the Mississippi and Ohio River systems in Illinois, Indiana, Kansas, Kentucky, in the Mississippi River from Louisiana, Missouri, and from the Missouri River to Nebraska, South Dakota to Tennessee.
DISPERSAL/SPREAD: The silver carp was purposely introduced into farm ponds to control phytoplankton as well as a food fish. It was soon stocked in other facilities that included sewage lagoons. It is believed that the silver carp found in natural waters are escapees from aquaculture facilities. Some are also thought to have entered our water as contaminant fish in grass carp stocks. Populations in Hawaii and in Colorado were intentionally released. They are now established in Louisiana and in Illinois.
MANAGEMENT: To control the silver carp it has been suggested that they be added to the federal list of injurious species. This would prohibit silver carp imports as well as interstate transport without proper permits. The fear that these fish could make their way into the Great Lakes and interrupt the $4 billion fishing industry has prompted the U.S. Army Corps of Engineers and the state of Illinois to build an electronic barrier to stop the spread of the carp. Agencies still need to educate the public about how to identify invasive species as to stop the accidental release of exotics like the silver carp. "
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