Reproduction and Mating Behavior in Rana LessonaeRana Esculenta Mixed Populations

  • H. J. Blankenhorn


From the results of Berger’s studies on European green frogs in Poland, it is known that Rana esculenta Linnaeus is a hybrid between Rana lessonae Camerano and Rana ridibunda Pallas (Berger 1964, 1966, 1967, 1968a, 1968b, 1970). When the current study was begun, only Rana esculenta had been reported for the greater part of Switzerland. Actually, three types of green frogs, Rana esculenta, Rana lessonae and Rana ridibunda occur in this region (Blankenhorn et al. 1971). The natural ratio of the three phenotypes is peculiar. Out of 24 frog populations explored in the course of the study, only three were pure ridibunda populations, whereas 21 populations were mixed populations of R. lessonae and R. esculenta (Blankenhorn 1973). The R. ridibunda populations are separated geographically from the R. lessonae and R. esculenta region, and there is strong evidence that R. ridibunda was introduced between 1950 and 1970 by medical institutes using R. ridibunda from eastern Europe for pregnancy tests (Blankenhorn 1973).


Green Frog Edge Zone Pairing Preference Prefer Zone Bufo Bufo 
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Copyright information

© Springer Science+Business Media New York 1977

Authors and Affiliations

  • H. J. Blankenhorn
    • 1
  1. 1.Ethologie und WildforschungUniversity of ZurichSwitzerland

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