Social and abiotic factors differentially affect plumage ornamentation of young and old males in an Australian songbird
Social and abiotic factors differentially affect plumage ornamentation of young and old males in an Australian songbird
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社会和非生物因素对澳大利亚鸣禽年轻和年老雄性羽毛装饰的影响不同
DOI：
10.1016/j.anbehav.2021.10.007
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发表时间：
2021
期刊：
影响因子：
2.5
通讯作者：
Webster, Michael S.
中科院分区：
文献类型：
--
作者：
Welklin, Joseph F.;Lantz, Samantha M.;Khalil, Sarah;Moody, Nicole M.;Karubian, Jordan;Webster, Michael S.
已知非生物环境条件和社会环境的变化都会影响性信号的获取。然而，非生物环境和社会因素的影响很少相互比较。在这里，我们测试这些因素的相对重要性，以确定是否以及何时雄性红背细尾鹩，Malurus melanocephalus，蜕皮成繁殖羽毛，一个已知的性信号。一岁大的雄性红背细尾鹩莺在是否获得装饰方面各不相同，而2岁及以上的雄性红背细尾鹩莺在获得装饰的时间上各不相同。目前还不清楚这些过程是由相同还是不同的因素决定的，我们使用长期育种记录和非育种社交网络的组合来检查这两个事件。我们发现，1岁的男性配对之前开始的繁殖季节更有可能获得rectented羽毛，但降雨并不影响1岁的男性是否获得rectented羽毛。因此，对于年轻人来说，社会线索似乎发挥了更大的作用比非生物环境因素在决定装饰收购。对于年长的男性，受降雨量的限制，与干燥的非繁殖季节，导致较差的生理条件和换羽日期较晚的收购时机。因此，在老年男性的性信号变化似乎是一个条件依赖的特性，由非生物的环境和生理因素，而不是社会线索。这些研究结果表明，影响性信号表达的因素可以随年龄而变化时，年龄组表现出不同形式的信号变化。我们的研究结果表明，社会环境可能会驱动年轻个体的性信号变化，而非生物环境的变化可能会驱动老年个体的性信号变化。
Both abiotic environmental conditions and variation in social environment are known to impact the acquisition of sexual signals. However, the influences of abiotic environmental and social factors are rarely compared to each other. Here we test the relative importance of these factors in determining whether and when male red-backed fairy-wrens,Malurus melanocephalus, moult into ornamented breeding plumage, a known sexual signal. One-year-old male red-backed fairy-wrens vary in whether or not they acquire ornamentation, whereas males age 2 years and older vary in their timing of ornament acquisition. It is unclear whether these processes are determined by the same or different factors, and we examined both events using a combination of long-term breeding records and nonbreeding social networks. We found that 1-year-old males that paired prior to the start of the breeding season were more likely to acquire ornamented plumage, but rainfall did not influence whether 1-year-old males acquired ornamented plumage. Thus, for young individuals, social cues appear to play a larger role than abiotic environmental factors in determining ornament acquisition. For older males, timing of ornamented plumage acquisition was constrained by rainfall, with drier nonbreeding seasons leading to poorer physiological condition and later moult dates. Thus, sexual signal variation in older males appears to be a condition-dependent trait, driven by abiotic environmental and physiological factors rather than social cues. These findings reveal that factors influencing sexual signal expression can vary with age when age classes exhibit different forms of signal variation. Our results suggest that social environment may drive sexual signal variation in young individuals, whereas abiotic environmental variation may drive sexual signal variation in older individuals.
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鹿角大小提供了狍雄性表型质量的真实信号
影响因子：
2.9
作者：
C. Vanpé;J. Gaillard;P. Kjellander;A. Mysterud;P. Magnien;D. Delorme;G. Laere;F. Klein;O. Liberg;A. J. Mark Hewison
通讯作者：
A. J. Mark Hewison
种群组成的波动减弱了表型可塑性对优良细尾鹪鹩性状动态的影响。
DOI：
10.1111/j.1365-2656.2011.01919.x
发表时间：
2012
期刊：
The Journal of animal ecology
影响因子：
--
作者：
Martijn van de Pol;Helen L. Osmond;A. Cockburn
通讯作者：
A. Cockburn
影响因子：
3.3
作者：
Dunn, PO;Cockburn, A
通讯作者：
Cockburn, A
影响因子：
2.8
作者：
Echeverry-Galvis, Maria A.;Hau, Michaela
通讯作者：
Hau, Michaela
表型可塑热带鸟类的羽毛颜色获取和行为与雄激素有关
影响因子：
2.5
作者：
W. Lindsay;M. Webster;Claire W. Varian;H. Schwabl
通讯作者：
H. Schwabl