[Press Release] Promiscuous lamprey found to conduct “sham matings”

Chitose Yamazaki, a Ph.D. student of the Division of Biosphere Science, and Assoc. Prof. Itsuro Koizumi revealed that the nonparasitic lamprey Lethenteron kessleri female mates repeatedly without releasing eggs, in a behavior termed “sham mating,” suggesting the possibility that females choose their mates while engaged in promiscuous mating habits. This research outcome is published in Journal of Ethology, an academic journal of Japan Ethological Society.

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Research Press Release (PDF)