A trade-off between reproduction and a condition-dependent sexually selected ornament in the house sparrow Passer domesticus
A trade-off between reproduction and a condition-dependent sexually selected ornament in the house sparrow Passer domesticus
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DOI：
10.1098/rspb.2000.1116
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发表时间：
2000-06-07
影响因子：
4.7
通讯作者：
Griffith, SC
中科院分区：
文献类型：
--
作者：
Griffith, SC
在自由生活的家麻雀（Passer domesticus）种群中操纵繁殖努力，以研究生殖投资与条件依赖性性选择装饰表达之间的权衡。该性状表达的表型可塑性与实验中由雄性饲养的后代的大小有关。在当前繁殖中投入更多的雄性随后对雌性更具吸引力，因为它们表现出对徽章较小的雄性的偏好。这支持了直接利益是女性择偶的主要关注点的观点。生殖努力和性装饰表达之间的权衡是性装饰和生活史特征表型变异的潜在重要来源。
Reproductive effort was manipulated in a free-living population of house sparrows (Passer domesticus) to investigate the trade-off between reproductive investment and the expression of a condition-dependent sexually selected ornament. Phenotypic plasticity in the expression of this trait was related to the experimentally manipulated size of the brood reared by a male. Males that invested more in current reproduction subsequently became more attractive to females in this population as they showed a preference for males with smaller badges. This supports the argument that direct benefits are a primary focus for mate choice by females. Trade-offs between reproductive effort and the expression of sexual ornaments are a potentially important source of phenotypic variation in both sexual ornaments and life-history traits.