2002 Frog and Toad Survey Isle Royale National Park, Michigan
Isle Royale National Park, Wagner A, Egan A. 2002. 2002 Frog and Toad Survey Isle Royale National Park, Michigan. Resource Management Report 02-2. 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. Four transect routes have been established. In 2002, surveys were conducted in the early spring, late spring, and summer on all four transects. Each transect has 10 or 12 survey points, totaling 42 points surveyed per run. The survey is based upon the calls given by the male frogs and toads during their various 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 the 2002 survey, five of the six species were heard on survey routes. The abundance of each species was similar to previous Isle Royale surveys, and also agrees with regional population trends which indicate relatively low abundance for mink frogs, high abundance for spring peepers, and intermediate abundance for the other four species. Species richness varied with habitat type.
- Type
- Published Report
- Authors
- Isle Royale National Park; Wagner, Amanda; Egan, Alexander
- Date of Issue
- 2002-09
- Publisher
- Isle Royale National Park
- Units
- ISRO
- Keywords
- Amphibian, anuran, frogs and toads, Isle Royale National Park, Michigan, Survey