Wiernasz Diane C
Department of Zoology NJ-15, University of Washington, Seattle, WA, 98195.
Evolution. 1989 Dec;43(8):1672-1682. doi: 10.1111/j.1558-5646.1989.tb02617.x.
Using field experiments, I examined the role of 13 melanin-pattern elements in mate choice by female Pieris occidentalis butterflies. Males that mated successfully differed significantly from unsuccessful males in the extent of marginal forewing melanization but not on the basis of the entire forewing pattern. Deletion of the marginal forewing melanin characters significantly reduced the mating success of manipulated males relative to controls under field conditions. Female choice in P. occidentalis may act to maximize divergence of male color pattern from that of its close relative Pieris protodice. Sexual selection for increased melanization of the marginal dorsal forewing is generated by the strong preference of females for males with such wings and may be constrained by correlations between forewing melanin characters that have different functional roles.
通过田间实验，我研究了13种黑色素模式元素在西方粉蝶（Pieris occidentalis）雌蝶择偶中的作用。成功交配的雄蝶与未成功交配的雄蝶在前翅边缘黑化程度上存在显著差异，但在整个前翅图案方面并无差异。在田间条件下，删除前翅边缘黑色素特征会显著降低被操纵雄蝶相对于对照雄蝶的交配成功率。西方粉蝶的雌蝶选择可能是为了使雄蝶的颜色模式与其近缘种原型粉蝶（Pieris protodice）的差异最大化。雌蝶对具有这种翅膀的雄蝶有强烈偏好，从而产生了对前翅背边缘黑色素增加的性选择，并且可能受到具有不同功能作用的前翅黑色素特征之间相关性的限制。
