A fish species thought extinct for nearly 40 years, the Shortnose Cisco, has been rediscovered by scientists in Lake Superior, where it was not believed to live. Overfishing and invasive species had caused its decline in the Great Lakes. The unexpected find was confirmed through genetic and morphological studies, vindicating an early researcher who had identified the species in Lake Superior. Restoring native cisco species, like the Shortnose Cisco, may help restore the disrupted Great Lakes ecosystem. Efforts to reintroduce cisco populations in various Great Lakes regions have shown promising results, with some populations adapting to invasive species and habitat changes on their own. These restoration efforts not only benefit the cisco populations, but also contribute to the overall health and resilience of the Great Lakes ecosystem. Despite some angler concerns, the restoration of coregonine species complements the sports fishery in the Great Lakes and helps maintain stability and resilience in the face of future threats. Scientists continue to study and monitor the reintroduced cisco populations to ensure successful reproduction and long-term sustainability.
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