1996 Frog and Toad Survey Isle Royale National Park, Michigan
Beeman JL and Oelfke JG. 1997. 1996 Frog and Toad Survey Isle Royale National Park, Michigan. Resource Management Report 96-4. Isle Royale National Park. Houghton, MI
In recent years, there has been a growing concern for the apparent decline in several species of anurans (frogs and toads). There is not only concern for the individual species but for the role these populations serve as an indicator of environmental quality. Isle Royale National Park established a frog survey program in 1996 to monitor and integrate island population data with the Michigan Department of Natural Resources Frog and Toad Survey program. The objectives of the program were to establish permanent survey routes and to estimate the abundance of calling males by species as a basis to monitor populations over the long term. Frog and toad surveys were conducted at Isle Royale in early spring, late spring, and summer by using two park trails as transects. A total of 20 points were surveyed in each of the 3 survey periods. The mean indices where species were observed was calculated for each survey period. A call index was used to estimate the numbers of calling males of a particular species. A total of 5 species of anurans were recorded on the two transects. Four species were located at both transects. Mean indices of calls varied among species; but call intensity, by species, was similar for the two transects. Recommendations are made for 1997.
- Type
- Published Report
- Authors
- Beeman, Jennifer; Oelfke, Jack
- Date of Issue
- 1997-05
- Publisher
- Isle Royale National Park
- Units
- ISRO
- Keywords
- American toad (Bufo americanus), Amphibians, anurans, Boreal chorus frog (Pseudacris triseriata maculata), frogs and toads (Salientia), green frog (Rana clamitans melanota), Isle Royale National Park, Michigan, mink frog (Rana septentrionalis), Population Density, Spring peeper (Pseudacris crucifer), Survey, Wood frog (Rana sylvatica)