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The Great Lakes’ fish problem is measured in billions

UTSC researchers are looking for ways to stop invasive round goby from moving farther inland, even when eradication is unrealistic.

A researcher holds a round goby during work on Great Lakes ecology.
UTSCA researcher holds a round goby during work on Great Lakes ecology.Photo: U of T Scarborough / official source image

Round goby numbers in the Great Lakes are measured in the billions, making a total wipeout unrealistic. UTSC researchers are instead looking for ways to limit how the invasive fish spreads inland.

The ecological story is a lesson in practical scale. Conservation often begins after the perfect solution has disappeared, with a smaller intervention that can still protect the next shoreline.

Sources 1
  1. Original reporting · utsc.utoronto.ca
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This story is from the August 2026 issue of Alumni Digest · U of T. It's free, monthly and independent.

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