Ramsey-Washington Metro Watershed District
  • Explore
    • Watershed Map
    • Projects and Waters
    • Management Plan and Reports
  • Get Involved
    • Watershed Education
    • WaterFest
    • Clean Water Tips
    • Stewardship Grants
    • Awards & Recognition
  • What’s New?
    • Events
    • News
    • Current Projects
  • Are You in the Watershed?
  • About
    • Covid-19 Update
    • Overview
    • Board of Managers
    • Our Team
    • Citizen Advisory Committee
    • Employment
    • Calendar
  • Contact
  • Document Library
  • Permits
  • Stewardship Grants
  • Explore
    • Watershed Map
    • Projects and Waters
    • Management Plan and Reports
  • Get Involved
    • Watershed Education
    • WaterFest
    • Clean Water Tips
    • Stewardship Grants
    • Awards & Recognition
  • What’s New?
    • Events
    • News
    • Current Projects
  • Are You in the Watershed?
  • About
    • Covid-19 Update
    • Overview
    • Board of Managers
    • Our Team
    • Citizen Advisory Committee
    • Employment
    • Calendar
    • Contact
    • Document Library
    • Permits
    • Stewardship Grants
  • Soomaali
  • Español
  • Hmoob
  • ကညီ

Carp Management – Lake Phalen Chain

Innovative management has reduced carp in the Phalen Chain by over 60 percent.

Project details

Cities St. Paul, Maplewood, Little Canada
Subwatersheds Lake Phalen, Keller Lake, Gervais Lake, Kohlman Lake
Timeline Ongoing since 2009
Cost $10,000 (2018 budget)
Funding sources District funds, Legislative-Citizen Commission on Minnesota Resources (initial research and program development)
Partners University of Minnesota, Minnesota DNR, City of Maplewood, City of Little Canada, City of St. Paul, City of North St. Paul, Ramsey County

Overview

In order to improve water quality in the Phalen Chain of Lakes, we began a long-term carp management program in 2009. Partnering with University of Minnesota researchers, we developed an innovative system to track seasonal carp movements, efficiently net adult carp and prevent young carp from recruiting into the system.

Why control carp?

The common carp is a non-native invasive fish species to Minnesota and is prevalent in most metro area lakes. Carp can live more than 60 years, and they stir up phosphorous-laden sediment while rooting for food on the bottoms of lakes, rivers and ponds. This activity, along with the carp’s excretion of nutrients, can harm water quality and aquatic plant communities. Carp densities over 90 pounds per acre typically result in negative impacts to lake systems.

In 2009, we teamed up with the University of Minnesota’s Sorensen Lab on an applied research project to investigate carp in the Phalen Chain. The main objectives were to: 1) determine carp abundance; 2) identify spawning areas; and 3) better understand what influences carp recruitment (maturing from an egg to an adult). Using radio telemetry, the team was able to track carp movements throughout the system at various times of year. The District funded this work along with the Legislative-Citizen Commission on Minnesota Resources (LCCMR).

Success to date

Since the initial research, we have made substantial progress in understanding the carp population and ecology in the Phalen Chain. Through focused management efforts, we have reduced the adult carp density by over 75 percent, from 158 pounds per acre to 36 pounds per acre (average biomass for Kohlman, Gervais, and Keller lakes).

We contracted with a commercial fisherman to net carp through the ice since they often form large schools during winter. Still, the key to long-term management is limiting carp access to spring spawning grounds.

In addition to strategically netting adult carp, we have located key spawning areas and have effectively eliminated several carp nurseries.To that end, we installed carp barriers in Kohlman Creek and the Gervais Mill Park channel that reduce the number of adult carp migrating into the Kohlman Basin and Gervais Mill Park wetlands during spring. We plan to continue managing carp over the the long term in the Phalen Chain.

More information

Video: The Carp Project (Part 1)

Video: The Carp Project (Part 2)

As interest in management of common carp populations grows, so does Carp Solutions (Star Tribune)

Carp-free Casey Lake in North St. Paul benefits east metro watershed (Lillie News)

Carp Talk – Keeping Tabs on Carp in the Phalen Chain

Connect

  • 2665 Noel Drive
  • Little Canada, MN 55117
  • P: 651-792-7950
  • E: office@rwmwd.org

Resources

  • Permits
  • Stewardship Grants
  • Calendar
  • Document Library
  • Weather Station
  • Website Credits
  • Privacy Policy