Female Meadow Voles, Microtus Pennsylvanicus, Cause Their Mates to Ejaculate Outside Their Reproductive Tract
Document Type
Article
Publication Title
Behaviour
Publication Date
1-1-2006
Keywords
external ejaculation, copulatory behavior, Microtus, sperm competition
Abstract
We report the first case of sperm wasting produced by females running away just before a male ejaculates. Consequently, males ejaculate outside the reproductive tract of the female. This behavior was observed at least once in 32.14% of 112 copulatory tests of meadow voles, Microtus pennsylvanicus. We found a negative correlation between percentage of external ejaculations experienced by males and the number of sperm allocated within the female reproductive tract. Thus, females may limit the fertilizing capacity of non-preferred males by causing them to ejaculate externally. The occurrence of external ejaculations was not affected by cues of other males, male body mass, female sexual experience, or male sexual experience.
Our results expand the growing view that females may be active participants in copulatory behavior and largely determine the fate and use of sperm.
Recommended Citation
delBarco-Trillo, Javier and Ferkin, Michael H., "Female Meadow Voles, Microtus Pennsylvanicus, Cause Their Mates to Ejaculate Outside Their Reproductive Tract" (2006). Faculty Publications – Biological Sciences. 164.
https://ir.library.illinoisstate.edu/fpbiosci/164
DOI
https://doi.org/10.1163/156853906779367017
Comments
This article was originally published by delBarco-Trillo, J. and Ferkin, M.H. (2006) Female meadow voles, Microtus pennsylvanicus, cause their mates to ejaculate outside their reproductive tract. Behaviour. 143: 1425-1437. https://doi.org/10.1163/156853906779367017.