10 invasive species threatening Canadian habitats
SubscriptionsGo to the Subscriptions Centre to manage your:My ProfileFrom parasites to crabs and living slime affectionately dubbed "rock snot," invasive species can wreak havoc when introduced into a new habitat. administration is taking steps to fight one of the worst offenders, the Asian carp, pledging $50 million US in 2012 to keep them out of the Great Lakes.We take a look at 10 non native plants and animals that are disrupting ecosystems in Canada.Asian carpSilver carp, native to Asia, can grow to be up to 1.3 metres long and weigh up to 50 kilograms while bighead carp are a little smaller. Both are types of Asian carp, several species of which have been multiplying rapidly through the Mississippi, Iowa and Illinois river systems since the 1990s when flooding allowed them to spread throughout the Mississippi watershed. Since then, bighead carp have been caught a mere 10 kilometres downstream from Lake Michigan, beyond barriers built to keep them out, and a type of Asian carp DNA has been found in Calumet Harbour on Lake Michigan. administration's new plan, water samples will now be taken to see whether the carp have established a foothold in the Great Lakes. Officials told the Associated Press new plans to prevent a carp invasion include increased trapping and netting in rivers that could provide access to the lakes, field tests of chemicals that could be used to lure carp in order to capture them and an acoustic water gun used to scare the fish away from waterways that flow into Lake Michigan.The sea lamprey is a primitive, parasitic fish that has made its way from the Atlantic Ocean into our waterways by stowing away on cargo ships. These eel like creatures with suction cup, bloodsucking mouths can kill more than 18 kg of the fish they prey on during their 12 to 20 month adult life stage. Their circular mouths puncture through the skin of fish, ensuring that prey die from blood loss or the after effects of the wounds. Sea lampreys entered the Great Lakes through a man made canal system and by 1938 were present in all five Great Lakes.Larvae of the Women Canada Goose Mystique Parka Black Singapore Price gypsy moth are known to eat the leaves of about 300 plants, causing widespread damage. The European species was first introduced in the 19th century and is considered a major pest. The moths are well established in Ontario and Quebec and have been threatening parts of southern New Brunswick and Nova Scotia for many years. Birds and small mammals are gypsy moth predators and useful as natural enemies of the bug. The gypsy moth will also eat blueberries, hazelnuts and several other important crops.This beetle from China attacks hardwood trees such as maples. It first appeared in North America in 1996 in New York state. In Canada, it was first found in 2003 in an industrial park between Toronto and the city of Vaughan. Officials are trying to eradicate it, and affected areas are placed under strict quarantine. The pest is believed to have been brought to North America in packaging materials used in shipping. Canada's temperate climate is well suited to the insect, whose larvae spend winters burrowed deep within trees to protect themselves from harsh winter conditions.