Implications of the introduction and transfer of non-indigenous marine species with particular reference to Canadian marine aquaculture.

摘要

A relatively new and emerging field relating to the world's oceans has been the identification of risks associated with the introduction of exotic or non-indigenous species. There are numerous pathways for the introduction, either accidentally or intentionally, of non-indigenous species to marine ecosystems. These pathways include aquaculture activities, ship's ballast water, aquarium trade, and individual release. The relative importance of specific dispersal methods varies both temporally and spatially, but each plays a significant role in the introduction and dispersal of marine species throughout coastal environments. Many studies have focused on the impacts of these invasions but relatively few have analyzed the biological, physical, and socioeconomic impacts of non-indigenous species on aquaculture operations. Therefore, the objective of this report is to analyze case studies that focus on the implications, either positive or negative, of non-indigenous marine species on specific ecosystems and how they affect marine aquaculture, particularly in Canada. (Abstract shortened by UMI.)