Sources of individual variation in plasma testosterone levels.
Sources of individual variation in plasma testosterone levels.
复制标题
血浆睾丸激素水平的个体变异来源。
DOI：
10.1098/rstb.2007.0001
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发表时间：
2008-05-12
影响因子：
6.3
通讯作者：
Foerster, Katharina
中科院分区：
文献类型：
--
作者：
Kempenaers, Bart;Peters, Anne;Foerster, Katharina
类固醇激素睾酮(T)在雄性繁殖的调节中起着核心作用，因为许多与生殖有关的生理、形态和行为特征都依赖于T。此外，在许多季节性繁殖的脊椎动物中，雄性血浆T水平通常在繁殖季节出现明显的峰值。虽然这种人口水平的模式已经得到了很好的研究，但令人惊讶的是，人们对季节性周期中个体T水平的巨大变化的来源和含义仍然知之甚少。了解T水平个体差异的潜在来源对行为和进化生态学家来说很重要，至少有两个原因。首先，在“诚实信号”理论中，假设T作为强制性选择质量指标表达诚实的假设因素发挥了关键作用。其次，T通常被认为是生活史中心权衡的关键中介，例如在生存与繁殖或交配与亲代照顾方面的投资。在这里，我们讨论了自由生活的鸟类种群中雄性血浆T水平的个体内和个体间变化模式。我们认为，目前尚不清楚这种差异主要反映的是潜在的个体素质差异（内在因素，如遗传或母系影响）还是环境差异（外在因素，包括一天中的时间、个体的领土地位和过去的经验）。鸟类行为内分泌学的研究主要集中在外部因素的影响上，而其他变异源往往被忽视。我们认为，采用综合方法并调查所有潜在变异源的相对重要性的研究对于解释个体血浆T水平数据至关重要。
The steroid hormone testosterone (T) plays a central role in the regulation of breeding in males, because many physiological, morphological and behavioural traits related to reproduction are T dependent. Moreover, in many seasonally breeding vertebrates, male plasma T levels typically show a pronounced peak during the breeding season. While such population-level patterns are fairly well worked out, the sources and the implications of the large variability in individual T levels within the seasonal cycle remain surprisingly little understood. Understanding the potential sources of individual variation in T levels is important for behavioural and evolutionary ecologists, for at least two reasons. First, in ‘honest signalling’ theory, T is hypothesized to play a critical role as the assumed factor that enforces honesty of the expression of sexually selected quality indicators. Second, T is often considered a key mediator of central life-history trade-offs, such as investment in survival versus reproduction or in mating versus parental care. Here, we discuss the patterns of within- and between-individual variation in male plasma T levels in free-living populations of birds. We argue that it is unclear whether this variability mainly reflects differences in underlying individual quality (intrinsic factors such as genetic or maternal effects) or in the environment (extrinsic factors including time of day, individual territorial status and past experience). Research in avian behavioural endocrinology has mainly focused on the effects of extrinsic factors, while other sources of variance are often ignored. We suggest that studies that use an integrative approach and investigate the relative importance of all potential sources of variation are essential for the interpretation of data on individual plasma T levels.
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影响因子：
2.1
作者：
Evans, MR;Roberts, ML;Goldsmith, AR
通讯作者：
Goldsmith, AR
DOI：
10.1016/0300-9629(87)90399-9
发表时间：
1987-01-01
影响因子：
2.3
作者：
BACHMAN, SE;BACHMAN, JM;MASHALY, MM
通讯作者：
MASHALY, MM
影响因子：
3.3
作者：
Dunn, PO;Cockburn, A
通讯作者：
Cockburn, A
影响因子：
3.3
作者：
Eising, Corine M.;Muller, Wendt;Groothuis, Ton G. G.
通讯作者：
Groothuis, Ton G. G.
DOI：
10.1098/rspb.2006.3764
发表时间：
2007-03-22
影响因子：
4.7
作者：
Alonso-Alvarez, Carlos;Bertrand, Sophie;Sorci, Gabriele
通讯作者：
Sorci, Gabriele