A new species of invasive Asian carp has appeared in three of North America´s Great Lakes, threatening the ecosystem, Canada´s fisheries and oceans ministry said Friday.
Grass carp, one of four Asian carp species, were captured between 2013 and 2016 in Lakes Michigan, Erie and Ontario, the ministry said, citing a joint Canada-US study.
The voracious fish, which can reach a weight of 45 kilograms (100 pounds) and 1.5 meters (five feet) in length, could cause "extreme" ecological damage within the next 50 years as it supplants native species, the study concluded, noting a lack of natural predators to keep its numbers in check.-read more
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