Scientists tracked 19 adult goldfish in Lake Ontario’s Hamilton Harbour: 2 years later, survivors still overwintered in the same areas and returned each spring

Over a two-year period, scientists monitored the movements of wild goldfish in Hamilton Harbour, discovering that these fish consistently returned to their specific overwintering and spawning grounds each year. This behavior is not only predictable but also facilitates their invasive expansion, complicating removal efforts. However, strategically targeting these gatherings has yielded some success, highlighting the need to prevent further introductions to effectively manage this invasive species.
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