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the past century, many areas have banned fish stocking for a variety of reasons. In 1959, for example, Yellowstone National Park fish stocking was banned due to cross-breeding between native and nonnative species that was harming the genetic uniqueness of existing populations. This makes fish populations more susceptible to disease. Today, Yellowstone has adopted the "catch-and-release method" to ensure that fishermen release fish back into the water after catching them. There are also restrictions

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