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The Copulatory Plug of the Adder, Vipera berus: Does It Keep Sperm in or out?

Claes Andrén and Göran Nilson
Oikos
Vol. 49, No. 2 (Jun., 1987), pp. 230-232
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3566030
Stable URL: http://www.jstor.org/stable/3566030
Page Count: 3
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Copulatory Plug of the Adder, Vipera berus: Does It Keep Sperm in or out?
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Abstract

Stille, Madsen and Niklasson (1986) argue that multiple paternity occurs in the adder, and that female adders can use sperm from matings in previous year(s). The data presented do not preclude the copulatory plug hypothesis of Nilson and Andrén (1982) concerning the function of the contracted uteri in mated female adders. We re-evaluate the results of Stille et al. (1986) and give additional information on adder reproductive biology, which support our previous conclusions.

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