The Problem of Nonindigenous Aquatic Species

Paper Summary:

Discusses problems incurring from acquatic species brought to the U.S. from Europe in ballast water of ships. Describes each species. Disruption of these nonindigenous species on the normal food chain, causing reduction in number of indigenous game fish. Negative economic impact on U.S. Fisning Industry. Possible measures that can be taken to prevent further invasion by nonindigenous acquatic species.

From the Paper:

"Abstract
The zebra mussel, Eurasian watermilfoil and round and tubenose goby are all nonindigenous species thought to have been brought to the United States from Europe in the ballast water of ocean-going vessels. These vessels pick up ballast water in their homeport when they are carrying a light load and discharge it here in U.S. waters when picking up heavier loads. This water often contains small fish, shellfish and plants native to the port where the ballast water was picked up, e.g. the Caspian Sea. Since these nonindigenous species have no natural predators here, they flourish and often outstrip native plants and waterlife by competing for food and space. This can severely disrupt the normal food chain, and cause the disappearance, or severe reduction in numbers of game fish..."

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