Effects of multiple mating and male eye span on female reproductive output in the stalk-eyed fly, Cyrtodiopsis dalmanni
Effects of multiple mating and male eye span on female reproductive output in the stalk-eyed fly, Cyrtodiopsis dalmanni
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DOI：
10.1093/beheco/12.6.732
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发表时间：
2001-11-01
影响因子：
2.4
通讯作者：
Pomiankowski, A
中科院分区：
文献类型：
--
作者：
Baker, RH;Ashwell, RIS;Pomiankowski, A
柄眼蝇（Cyrtodiopsis dalmanni）的雌性在其一生中反复交配，并表现出对大眼距雄性的交配偏好。这些交配决定是如何影响女性的健康的还不完全清楚。在本研究中，我们研究了多次交配和雄性眼距对该物种短期生殖输出的影响。操纵雌性接受的交配次数和伴侣数量的实验表明，获得足够的精子供应是与多次交配相关的重要好处。雌性产卵的平均受精率随交配频率的增加而增加，从一次交配的40%到连续交配的80%不等。此外，该物种中有很高比例的交配失败。三分之一的雌性交配一次产下的受精卵不到10%。与多个伴侣交配的雌性和与单个伴侣交配的雌性在繁殖性能上无显著差异。也没有迹象表明雌性从与大眼距的雄性交配中获得任何短期的生殖利益。事实上，与眼距短的雄性交配的雌性比与眼距大的雄性交配的雌性产卵率更高。
Females of the stalk-eyed fly, Cyrtodiopsis dalmanni, mate repeatedly during their lifetime and exhibit mating preference for males with large eye span. How these mating decisions affect female fitness is not fully understood. In this study, we examined the effects of multiple mating and male eye span on short-term reproductive output in this species. Experiments that manipulated the number of copulations and partners a female received suggested that obtaining a sufficient sperm supply is an important benefit associated with multiple mating. The average percentage of fertile eggs laid by females increased as a function of mating frequency and ranged from 40% for females mated once, to 80% for females mated continuously. In addition, a high proportion of copulations in this species appeared to be unsuccessful. One-third of all females mated once laid less than 10% fertile eggs. There was no significant difference in reproductive performance between females mated to multiple partners and females mated to a single partner. There was also no indication that females received any short-term reproductive benefits from mating with males with large eye span. In fact, females mated to males with short eye span laid a higher percentage of fertile eggs than females mated to large eye span males.