A UW-Madison study concluded that fishing has a greater effect on fish populations than rising temperatures resulting from global warming, according to a Wisconsin Public Radio report.
State, federal and university researchers published their findings in the peer-reviewed journal Science Advances after studying data collected by tribal and state agencies over the past four decades. In the study, 521 fish populations in about 200 lakes were studied across the Midwest.
The conclusion was thus: anglers are sinking fish populations, with a greater effect on 92% of the populations. Cisco, however, was greatly affected negatively by warming.
Researchers conclude that a limit on fish harvests could help populations recover. However, it would be a temporary fix if increased temperature trends continue.
Sport fishing is a huge economic driver in Wisconsin, bringing in over $2 billion annually.
