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Boom times for fish populations in Wisconsin lakes
![Bluegill in Wisconsin's Sparkling Lake show astonishing variability in numbers from year to year.](/news/mmg/media/images/ExtremesPaper_Bluegill_Sparkling_Hansen_f.jpg)
Bluegill in Wisconsin's Sparkling Lake show astonishing variability in numbers from year to year.
Credit: Gretchen Hansen
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![Researchers sample fish in lakes by dark of night; the results help with population estimates.](/news/mmg/media/images/ExtremesPaper_LTERNightSampling_Hinterthuer_f.jpg)
Researchers sample fish in lakes by dark of night; the results help with population estimates.
Credit: Adam Hinterthuer
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![Even in winter, scientists are out taking samples at the NSF LTER site on Wisconsin lakes.](/news/mmg/media/images/ExtremesPaper_LTERWinterSampling_Hinterthuer_f.jpg)
Even in winter, scientists are out taking samples at the NSF LTER site on Wisconsin lakes.
Credit: Adam Hinterthuer
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![Scientist Ryan Batt obtains readings of oxygen levels in a lake in northern Wisconsin.](/news/mmg/media/images/ExtremesPaper_Batt_OxygenSampling_Carpenter_f.jpg)
Scientist Ryan Batt obtains readings of oxygen levels in a lake in northern Wisconsin.
Credit: Steve Carpenter
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![Researchers census fish populations in lakes in Wisconsin. Seen here, a common carp.](/news/mmg/media/images/ExtremesPaper_LTERFishCrewCarp_Hinterthuer_f.jpg)
Researchers census fish populations in lakes in Wisconsin. Seen here, a common carp.
Credit: Adam Hinterthuer
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![Ryan Batt rows out to collect minnow traps in a northern Wisconsin lake.](/news/mmg/media/images/ExtremesPaper_Batt_Minnow-traps_Branscombe_f.jpg)
Ryan Batt rows out to collect minnow traps in a northern Wisconsin lake.
Credit: Ali Branscombe
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