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(a) Mating latency (mean minutes ± s.e.) for males from the male-biased (MB) and female-biased (FB) selection lines either exposed or not exposed to rivals for 5 days prior to mating. (b) Mating duration (mean minutes ± s.e.) for males from the MB and FB selection lines either exposed or not exposed to rivals for 5 days prior to mating. Black bars,+rivals; grey bars,−rivals.
