Long-sperm precedence and other cryptic female choices in Drosophila melanogaster.

IF 3.1 2区 环境科学与生态学 Q2 ECOLOGY Evolution Pub Date : 2024-12-21 DOI:10.1093/evolut/qpae183
Brooke Peckenpaugh, Joanne Y Yew, Leonie C Moyle
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引用次数: 0

Abstract

Females that mate multiply make postmating choices about which sperm fertilize their eggs (cryptic female choice); however, the male characteristics they use to make such choices remain unclear. In this study, we sought to understand female sperm use patterns by evaluating whether Drosophila melanogaster females adjust sperm use (second male paternity) in response to four main factors: male genotype, male courtship effort, male pheromone alteration, and male postmating reproductive morphology. Our experiment was replicated across four different D. melanogaster lines, in a full factorial design, including a pheromone manipulation in which second males were perfumed to resemble heterospecific (D. yakuba) males. We found that females prefer longer sperm-regardless of mating order-in almost all contexts; this observed pattern of 'long-sperm precedence' is consistent with female postmating choice of high-fitness male traits. Nonetheless, we also found that this general preference can be plastically altered by females in response to effects including perfuming treatment; this differential female sperm use is between otherwise identical males, and therefore solely female-mediated. Furthermore, our finding that females exercise choice using diverse criteria suggests a possible mechanism for the maintenance of variation in sexually selected male traits.

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来源期刊
Evolution
Evolution 环境科学-进化生物学
CiteScore
5.00
自引率
9.10%
发文量
0
审稿时长
3-6 weeks
期刊介绍: Evolution, published for the Society for the Study of Evolution, is the premier publication devoted to the study of organic evolution and the integration of the various fields of science concerned with evolution. The journal presents significant and original results that extend our understanding of evolutionary phenomena and processes.
期刊最新文献
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