Effects of experimental brood size manipulation and gender on carotenoid levels of Eurasian kestrels Falco tinnunculus.
Effects of experimental brood size manipulation and gender on carotenoid levels of Eurasian kestrels Falco tinnunculus.
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实验性育雏尺寸的操纵和性别对欧亚kestrels falco tinnunculus的类胡萝卜素水平的影响。
DOI：
10.1371/journal.pone.0002374
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发表时间：
2008-06-11
期刊：
影响因子：
3.7
通讯作者：
Korpimäki E
中科院分区：
文献类型：
--
作者：
Laaksonen T;Negro JJ;Lyytinen S;Valkama J;Ots I;Korpimäki E
动物使用类胡萝卜素色素着色，作为抗氧化剂和免疫系统的增强剂。因此，类胡萝卜素依赖的颜色可以信号个人的质量和类胡萝卜素也被建议调解生活史的权衡。要检查权衡类胡萝卜素分配父母和年轻人之间，或在不同层次的育雏需求的父母的皮肤着色和血浆之间，我们操纵的育雏大小的欧亚红隼（Falco tinnunculus）。育雏大小的操作没有整体影响血浆类胡萝卜素水平或父母的肤色，但女性父母的两倍，血浆类胡萝卜素水平的男性。男性比女性更努力地工作，因此他们也可能比女性使用更多的类胡萝卜素来对抗氧化应激。或者，雌性可以通过在雏鸟早期食用富含类胡萝卜素的食物来恢复它们在产卵期间消耗的类胡萝卜素储备。在扩大育雏雏鸟有较高的血浆类胡萝卜素浓度比那些在减少育雏。这种差异不能用饮食来解释。根据最近来自其他物种的证据，我们认为这可能是由于在扩大的育雏有较高的睾酮水平，这反过来又增加了血浆类胡萝卜素水平的幼鸟。我们的实验的部分交叉寄养设计揭示了证据的起源影响（遗传或母亲）类胡萝卜素水平的雏鸟，但没有起源与环境的相互作用。这些结果从野生鸟类不同的研究在圈养，从而提供了新的见解类胡萝卜素生理学有关的分裂父母的照顾和需求的育雏。
Animals use carotenoid-pigments for coloration, as antioxidants and as enhancers of the immune system. Carotenoid-dependent colours can thus signal individual quality and carotenoids have also been suggested to mediate life-history trade-offs. To examine trade-offs in carotenoid allocation between parents and the young, or between skin coloration and plasma of the parents at different levels of brood demand, we manipulated brood sizes of Eurasian kestrels (Falco tinnunculus). Brood size manipulation had no overall effect on plasma carotenoid levels or skin hue of parents, but female parents had twice the plasma carotenoid levels of males. Males work physically harder than females and they might thus also use more carotenoids against oxidative stress than females. Alternatively, females could be gaining back the carotenoid stores they depleted during egg-laying by eating primarily carotenoid-rich food items during the early nestling stage. Fledglings in enlarged broods had higher plasma carotenoid concentrations than those in reduced broods. This difference was not explained by diet. In light of recent evidence from other species, we suggest it might instead be due to fledglings in enlarged broods having higher testosterone levels, which in turn increased plasma carotenoid levels. The partial cross-foster design of our experiment revealed evidence for origin effects (genetic or maternal) on carotenoid levels of fledglings, but no origin-environment interaction. These results from wild birds differ from studies in captivity, and thus offer new insights into carotenoid physiology in relation to division of parental care and demands of the brood.
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影响因子：
5.2
作者：
Horak, P;Ots, I;Murumägi, A
通讯作者：
Murumägi, A
影响因子：
4.8
作者：
BRUSH, AH
通讯作者：
BRUSH, AH
影响因子：
0.9
作者：
Bostrom, Mark R.;Ritchison, Gary
通讯作者：
Ritchison, Gary
影响因子：
1.7
作者：
Casagrande, S;Csermely, D;Tagliavini, J
通讯作者：
Tagliavini, J
影响因子：
2.8
作者：
Costantini, David;Fanfani, Alberto;Dell'Omo, Giacomo
通讯作者：
Dell'Omo, Giacomo