In 1944 the senior author censused a number of populations of thie Redbacked Salamander (Plethodon cinereus) in the vicinity of Ann Arbor, Michigan. Some of the results from successive counts in the same area suggeted that either there was considerable shifting of individuals, or that the methods used did not permit complete counts, or both. The study reported here was made in 1945 in an attempt to learn more concerning the usefulness of the census methods employed.
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Test et al. (1948) studied this question.
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