SGER: Female Influences on Sperm Storage and Use in Two Species of Tephritid Flies with Divergent Mating Systems

SGER：雌性对两种具有不同交配系统的实蝇的精子储存和使用的影响

• 批准号: 0221297
• 负责人: Ann Fritz
• 金额: $ 1.23万
• 依托单位: Eastern Illinois University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-06-01 至 2005-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0221297&HistoricalAwards=false
• 关键词: SGER; Female; Influences; Sperm; Storage

'Female choice' is a form of sexual selection well documented at the level of precopulatory choice and helps to explain many male traits (e.g. peacock feathers). After or during copulation, however, females may differentially influence the fate of ejaculate from two or more males to affect paternity outcomes. This phenomenon, referred to as 'cryptic female choice' (CFC), is currently under intense investigation because 1) it adds a new dimension to the evolutionary conflict between the sexes, and 2) it changes our views on the degree to which females influence male reproductive success. This study examines the relationship between two species of tephritid flies with divergent mating systems and the potential for female influence on sperm use and storage. One species mates infrequently and has a complex courtship behavior, whereas the other species mates frequently and has minimal courtship behavior. CFC is predicted to be more important in species that exhibit multiple matings with little pre-copulatory choice. This study uses a multi-pronged approach to estimate the presence and degree of female influence on reproductive outcomes by examining sperm storage, mating behavior, neuromuscular control, and paternity outcomes in relation to male characters.

“女性选择”是一种性别选择形式，在交配前的选择水平上有很好的记录，并有助于解释许多男性特征(例如孔雀羽毛)。然而，在交配之后或交配期间，雌性可能会不同地影响两个或更多雄性射精的命运，从而影响父亲的结果。这种现象被称为“神秘的女性选择”(Cfc)，目前正在进行深入的研究，因为1)它为两性之间的进化冲突增加了一个新的维度，2)它改变了我们对女性影响男性生殖成功程度的看法。这项研究考察了两种具有不同交配系统的粉蝶之间的关系，以及雌性苍蝇对精子使用和储存的潜在影响。一个物种很少交配，有复杂的求偶行为，而另一个物种经常交配，求偶行为最少。据预测，在交配前几乎没有选择的物种中，氯氟化碳的重要性更大。这项研究使用多管齐下的方法，通过检查精子储存、交配行为、神经肌肉控制和父子关系与男性特征的关系，来评估女性对生殖结果的影响及其程度。