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首页> 外文期刊>Journal of Avian Biology >Sex-dependent response of primary moult to simulated time constraints in the rock sparrow Petronia petronia
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Sex-dependent response of primary moult to simulated time constraints in the rock sparrow Petronia petronia

机译：岩石麻雀Petronia petronia对初级时间对模拟时间限制的性别依赖性反应

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There is growing evidence that moult speed affects plumage quality. In many bird species, males and females differ in terms of breeding effort, survival expectation and the relationship between fitness and plumage quality. Consequently, differences in moult strategies between the sexes can be expected. The aim of this study was to assess whether, under simulated time constraints and with no parental investment in the previous breeding season, males and females differed in: a) timing and duration of primary moult, b) growth rates of individual primary feathers, and c) number of concurrently growing feathers. We investigated the effect of time constraints generated by a treatment consisting of two decreasing photoperiods (slow changing photoperiod, SCP=2 min day-1 and fast changing photoperiod, FCP=8 min day-1) on the primary post-nuptial moult of captive rock sparrows Petronia petronia. Females started to moult on average 14 and 15 days later than males in both experimental groups. Primary moult duration was 10 (FCP) and 24 (SCP) days longer in males than in females, and, within sex, 34 (females) and 48 (males) days longer in SCP birds than in FCP ones. Females renewed a larger number of primaries simultaneously (5.7% in FCP and 12.8% in SCP) and had a higher total daily feather mass grown (9.9% in FCP and 22.4% in SCP), even though daily growth rates of individual primaries did not differ between sexes. As a result, males and females completed their primary moult at the same time within treatment. The observed differences in timing, duration and energy allocation for primary moult between the sexes probably have a genetic basis, as birds did not engage in reproduction during the preceding breeding season.
机译：越来越多的证据表明换羽速度会影响羽毛质量。在许多鸟类中，雄性和雌性在育种努力，生存预期以及体质与羽毛质量之间的关系方面存在差异。因此，可以预期男女之间在换毛策略上会有所不同。这项研究的目的是评估在模拟的时间限制下并且在上一个繁殖季节没有父母的投资的情况下，雄性和雌性在以下方面是否存在差异：a）初生蜕皮的时间和持续时间，b）单个初生羽毛的生长速度，以及c）同时生长的羽毛数量。我们调查了由两个减少的光周期（缓慢变化的光周期，SCP = 2分钟第1天和快速变化的光周期，FCP = 8分钟第1天）组成的治疗所产生的时间限制对圈养期的主要婚前蜕变的影响岩石麻雀Petronia petronia。在两个实验组中，女性平均比男性晚蜕皮14和15天。雄性的成年换代期比雄性的长10天（FCP）和24天（SCP），而在雌性中，与FCP的相比，SCP鸟类的成年天数分别长34天（雌性）和48天（雄性）。雌性同时更新大量的原色（FCP中为5.7％，SCP中为12.8％），并且日总羽毛生长量更高（FCP中为9.9％，SCP中为22.4％），尽管各个原色的日增长率没有性别不同。结果，雄性和雌性在治疗中同时完成了一次蜕皮。由于鸟类在前一个繁殖季节没有从事繁殖，因此在性别之间观察到的初次换羽的时间，持续时间和能量分配方面的差异可能具有遗传基础。

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