Risk Analysis for Non-Native Species in Aquaculture

Many non-native aquatic species have been introduced into the United States. Some benefit society by providing food, recreational opportunities, and the associated socio-economic activity. But some introduced species that have escaped or been released are undesirable additions to aquatic ecosystems because they cause ecological or economic harm or are dangerous to human health. These are called invasive species. Although only a small minority of introduced aquatic species cause serious problems, it is often difficult to predict which species will become problematic. Therefore, the introduction of species outside their native ranges always carries some element of risk.