Word: bighead
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Dates: during 2000-2009
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...escaping and competing with or consuming native fish, or cross-breeding with them and diluting the genes that have helped them survive. Fish escapes are common: nets are ripped open by predators or storms, fish in ponds get swept into channels by rainfall, others are released accidentally during transport. Bighead and silver carp that were introduced to China's plateau lakes in the 1950s have cleared those waters of whole species of indigenous fish. And Asian carp, which were introduced in Mississippi Delta catfish ponds to control parasites, escaped in the early 1990s and have migrated up the Mississippi...
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