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The Copulatory Plug of the Adder, Vipera berus: Does It Keep Sperm in or out?
Claes Andrén and Göran Nilson
Vol. 49, No. 2 (Jun., 1987), pp. 230-232
Stable URL: http://www.jstor.org/stable/3566030
Page Count: 3
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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.
Oikos © 1987 Nordic Society Oikos