擇偶進化的主要機制之一,其特點是「動物對特定刺激的選擇性反應」,這可被視作一種行為[1]。換句話說,在動物與潛在配偶接觸之前,它們首先會評估該配偶的各個方面來判斷其品質,比如配偶所擁有的資源或表型,然後會評估這些特定特徵是否對自己有利。[1]

擇偶在求偶場中很常見。在求偶場,雄性黑琴雞聚集在沼澤中,雌性來此觀察雄性,然後選擇一隻進行交配。

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