Canadian aquatic invasive species are all forms of life that traditionally has not been native to Canada's waterways. In Eastern Canada, non-native plant and animal species are a concern to biologists. Bringing non-native species such as invasive fishes into Canada can damage the environment and ecosystem by repressing native species due to food competition or preying. Invasive fishes enter the fresh waters of Canada in several ways including drifting, deliberate introduction, accidental release, experimental purposes and, most commonly, through the attachment on international boat hulls.[1] Invasive species are the second biggest threat to fish and other marine life in Canada behind loss of habitat and degradation. The threat to native species is primarily caused by impacts on the food web; however, invasive species also bring dangerous pathogens and physically interfere with existing aquatic life.[2] Invasive species include sea lampreys, zebra mussels, smallmouth bass, European green crab, vase tunicate, and sea squirts.
^Government of Canada, Fisheries and Oceans Canada (2019-05-03). "About aquatic invasive species". www.dfo-mpo.gc.ca. Retrieved 2021-11-02.
^Dextrase, Alan; Mandrak, Nicholas (2006-01-01). "Impacts of Alien Invasive Species on Freshwater Fauna at Risk in Canada". Biological Invasions. 8 (1). Springer Netherlands: 13–24. doi:10.1007/s10530-005-0232-2. ISSN 1387-3547. S2CID 9422553.
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