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dead fish on beach of Ohio River

Recent reports of dead fish along the Ohio River banks have once again raised concerns among residents, particularly in Brandenburg, Kentucky. This seasonal trend primarily affects Asian or silver carp, an invasive species in the area. While alarming, experts explain that this phenomenon results from a complex interplay of environmental factors.

Primary Causes of the Ohio River Fish Die-Off

Joshua Tompkins, a biologist with the Kentucky Department of Fish and Wildlife, outlines three main factors causing the die-off:

  • Bacterial infections
  • Gas buildup in water
  • Under-oxygenated water throughout the system

Brandenburg’s Waterfront: A Microcosm of the Issue

Brandenburg’s picturesque waterfront, usually a hub of recreational activity, has been significantly impacted. Local resident Mary Thompson shares, “We’re used to some dead fish, but this year seems worse. It’s affecting our summer gatherings by the river.”

Additional Factors Contributing to the Fish Die-Off in Brandenburg

  1. Warmer Water Temperatures: “Typically, warmer water doesn’t hold as much oxygen as cooler water. With the decrease in dissolved oxygen, the fish are essentially suffocating,” explains Tompkins.
  2. Increased Runoff: Recent heavy rains have led to more pollutants and nutrients in the river, causing algal blooms that further deplete oxygen levels.
  3. Industrial Impact: Brandenburg’s location downriver from several industrial areas makes it particularly susceptible to pollutants.
  4. Lock and Dam Systems: The nearby Cannelton Locks and Dam may create areas of low water flow, trapping fish and exacerbating low oxygen conditions.
  5. Climate Change: Warmer overall temperatures lead to earlier and more severe river stratification, particularly noticeable near Brandenburg.

Expert Assurances and Public Participation

Despite concerns, the Kentucky Department of Fish and Wildlife assures the public that there’s no cause for alarm. They continue to monitor the situation closely and encourage public participation in river health monitoring.

“We always appreciate Kentuckians reporting fish kills or anything out of the ordinary,” Tompkins states. “There’s a finite number of Kentucky Fish and Wildlife staff, so we rely on public input to help us respond to unusual occurrences.”

Long-Term Solutions and Community Concerns

For Brandenburg, KY residents like Thompson, reassurances are welcome, but concerns persist. “We understand it’s a natural process, but it’s hard not to worry when you see so many dead fish. We hope there are long-term solutions to improve our river’s health.”

As Brandenburg and other Ohio River communities continue to grapple with this seasonal phenomenon, experts emphasize the importance of ongoing research, public education, and collaborative efforts to manage invasive species and improve overall river health.

Report Fish Die-Offs

If you observe significant numbers of dead fish or unusual river conditions in Brandenburg or along the Ohio River, please contact the Kentucky Department of Fish and Wildlife at (502) 942-5052.