A quantitative approach to the mortality resulting from traffic in a population of Bufo bufo L.
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- van Gelder, J.J. Oecologia (1973) 13: 93. doi:10.1007/BF00379622
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During the breeding migration of Bufo bufo in 1971 the number of females was counted, killed by traffic on an asphalt road with about 10 cars/hour. By counting egg-strings the total number of females was estimated too. By comparing both data it appeared that 30% of the females passing the road were run over. For the males a similar percentage is expected.