Early research confirmed the role of intrasexual selection.
早期的研究证实了无性选择的作用。
In the first, male competition and intrasexual selection produce relatively short, simple songs used mainly in territorial behavior.
在第一种情况下，雄性竞争和性内选择产生相对简短的鸣声，主要用于地盘行为。
In the first, male competition and intrasexual selection produce relatively short, simple songs used mainly in territorial behavior.
在第一种情况下，雄性竞争和性内选择产生相对简短的鸣声，主要用于地盘行为。
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