Zbinden, Marc; Largiadèr, Carlo R.; Bakker, Theo C. M. - In: Behavioral Ecology 15 (2004) 1, pp. 137-140
Sperm competition occurs when sperm of two or more males compete to fertilize a given set of eggs. Theories on sperm … competition expect males under high risk of sperm competition to increase ejaculate size. Here we confirm this prediction … by neighboring males) can lead to sperm competition. Sneaking males invade foreign nests, and the owners vigorously try …