Introduction & overview

Return to Conservation Biology Research on Amphibians

Anderson, Y.C. and R.J. Baker. 2002. Minnesota frog and toad calling survey 1996 - 2002. Minnesota Department of Natural Resources Report. 9 pp.

Introduction & overview:

The Minnesota Frog and Toad Calling Survey (MFTCS) was developed in response to concern over the potential for population declines in Minnesota's fourteen frog and toad species. In 1993, a pilot project established 20 frog and toad survey routes under the coordination of herpetologist John Moriarty, and with funding from the Minnesota Herpetological Society and the Society for the Study of Amphibians and Reptiles. Building on this and similar efforts throughout the U.S., in 1996 the U.S. Geological Survey's Biological Resources Division initiated the North American Amphibian Monitoring Program (NAAMP). NAAMP methods, now used in the MFTCS, are designed to detect trends within the state's frog and toad populations over time. The results of this ongoing study will provide information on where species are located throughout the state, and how their populations change in abundance and distribution. Many frog and toad species are indicators of habitat quality. Their presence in, or disappearance from, an area may provide information on the condition of Minnesota's wetland habitats.

The MFTCS owes it's ongoing growth and success to it's large base of participants from throughout the state. Without the interest and dedication of these generous volunteers, this project would not be possible. We want to thank them, and provide this report to demonstrate how their efforts are contributing valuable information that will help manage Minnesota's natural resources.

A total of 116 MFTCS routes have been run in Minnesota, with additional routes being added annually. The routes vary by how many years each have been run. The original 136 NAAMP routes are randomly distributed throughout Minnesota. Despite efforts to recruit volunteers for all routes, many routes have yet to be monitored.

Thirteen of the fourteen species of frogs and toads were heard on at least one route in Minnesota between 1996 - 2002. The distribution maps in this report use data from routes that have been run for at least two years.

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