Oxidative stress during courtship affects male and female reproductive effort differentially in a wild bird with biparental care
Oxidative stress during courtship affects male and female reproductive effort differentially in a wild bird with biparental care
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求爱期间的氧化应激对双亲照顾的野生鸟类的雄性和雌性生殖努力的影响不同
DOI：
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发表时间：
2016
影响因子：
2.8
通讯作者：
R. Torres
中科院分区：
文献类型：
--
作者：
Bibiana Montoya;M. Valverde;E. Rojas;R. Torres
摘要氧化应激被认为是调节生殖努力的生理机制之一，包括对配偶选择的投资。在这里，我们评估了氧化应激是否影响繁殖决策作为一个成本或约束繁殖的棕色鲣鸟（苏拉leucogaster），一个长寿的海鸟与长期的双亲照顾。我们发现，在求偶过程中，脂质过氧化（LP）的男性和女性的水平呈正相关，与gal肤色，一个性状推测用于择偶，而活性氧（ROS）的水平较高，奠定接近和早期育种对。证据表明，女性的氧化应激的约束作用的事实，即女性在求偶过程中具有较高的活性氧产下较小的第一个鸡蛋，并有小鸡的体重增加率较低，较高的女性LP与较低的后代出席时间。没有证据表明父母的努力的氧化成本被发现，从求爱到父母的照顾，在男性和女性的ROS水平下降，LP水平的变化是不显着的。最后，通过交叉寄养实验，我们发现后代ROS与养育和遗传父母的ROS无关。有趣的是，后代LP是积极相关的LP在求爱的养育父母和遗传父亲，这表明后代LP可能有遗传和环境的组成部分。因此，在褐鲣鸟中，氧化应激可能是产卵前对生殖性状投资的成本，并限制了雌性对卵和父母照顾的投资。总结：在棕色鲣鸟中，氧化应激可能是两性产卵前生殖投资的成本，并限制了雌性对卵子和后代的投资。
ABSTRACT Oxidative stress has been suggested as one of the physiological mechanisms modulating reproductive effort, including investment in mate choice. Here, we evaluated whether oxidative stress influences breeding decisions by acting as a cost of or constraint on reproduction in the brown booby (Sula leucogaster), a long-lived seabird with prolonged biparental care. We found that during courtship, levels of lipid peroxidation (LP) of males and females were positively associated with gular skin color, a trait presumably used in mate choice, while levels of reactive oxygen species (ROS) were higher as laying approached and in early breeding pairs. Evidence of a constraining effect of oxidative stress for females was suggested by the fact that females with higher ROS during courtship laid smaller first eggs and had chicks with lower rates of body mass gain, and higher female LP was associated with lower offspring attendance time. No evidence of an oxidative cost of parental effort was found; from courtship to parental care, levels of ROS in males and females decreased, and changes in LP levels were non-significant. Finally, using a cross-fostering experiment we found that offspring ROS was unrelated to rearing and genetic parents' ROS. Interestingly, offspring LP was positively associated with the LP during courtship of both the rearing parents and the genetic father, suggesting that offspring LP might have both a genetic and an environmental component. Hence, in the brown booby, oxidative stress may be a cost of investment in reproductive traits before egg laying and constrain females' investment in eggs and parental care. Summary: In the brown booby, oxidative stress may arise as a cost of pre-laying reproductive investment in both sexes and constrain investment in eggs and offspring by females.
影响因子：
9.2
作者：
Mundy, Nicholas I.;Stapley, Jessica;Slate, Jon
通讯作者：
Slate, Jon
影响因子：
14.8
作者：
Dickinson, Bryan C.;Chang, Christopher J.
通讯作者：
Chang, Christopher J.