2000 Frog and Toad Survey at Isle Royale National Park, Michigan
Isle Royale National Park, Milanowski S, Egan A, Oelfke J. 2000. 2000 Frog and Toad Survey at Isle Royale National Park, Michigan. Resource Management Report 00-2. Isle Royale National Park. Houghton, MI
Isle Royale National Park, Michigan established a survey of frogs and toads in 1996 to monitor anuran populations on the island, as well as to integrate these findings with those of the Frog and Toad Survey program conducted by the Michigan Department of Natural Resources. Originally, two transects were established along park trails, with a third added in 1997 and a fourth added in 1999. In 2000, frog and toad surveys at Isle Royale were conducted in the early spring, late spring, and summer on all four transects. Each transect has 10 survey points, for a total of 40 points surveyed per run. The survey is based upon calls given by the male frogs and toads during their varoius mating seasons. Call indexes were used to indicate the relative abundance of frogs and toads calling. These indexes were averaged and compared to those recorded in previous years. During 2000, all six species were heard on survey routes. The abundance of each species was similar to previous Isle Royale surveys and closely matches separate regional data. Species richness varied per habitat type, and comparisons between call index and rainfall has shown a close correlation for four of the six species present.
- Type
- Published Report
- Authors
- Isle Royale National Park; Milanowski, Shannon; Egan, Alexander; Oelfke, Jack
- Date of Issue
- 2000
- Publisher
- Isle Royale National Park
- Units
- ISRO
- Keywords
- Amphibians, anurans, frogs and toads, Isle Royale National Park, Michigan, Survey