A PHYLOGENETIC INTERPRETATION OF SEXUAL DIMORPHISM IN BODY SIZE AND ORNAMENT IN RELATION TO MATING SYSTEM IN BIRDS
A PHYLOGENETIC INTERPRETATION OF SEXUAL DIMORPHISM IN BODY SIZE AND ORNAMENT IN RELATION TO MATING SYSTEM IN BIRDS
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DOI：
10.1046/j.1420-9101.1990.3030171.x
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发表时间：
1990-04-01
影响因子：
2.1
通讯作者：
BJORKLUND, M
中科院分区：
文献类型：
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作者：
BJORKLUND, M
体型和装饰上的两性异形通常被认为是性选择的结果。因此，交配系统的类型与两性异形的程度相关的物种之间的模式是预期的。这是使用自相关模型使用鸟类的比较数据进行分析。交配系统与装饰（尾巴）的两性异形相关，但与两性大小（跗骨）的两性异形相关很弱。一夫多妻制的物种显着大于一夫一妻制的物种。在对体型进行校正后，一夫多妻制和一夫一妻制物种的体型二型性没有差异。相反的是真实的尾巴二型性;一夫多妻制物种表现出更大程度的尾巴二型性，但没有差异的绝对大小的尾巴。这种模式表明，交配系统的进化变化与整体大小的变化以及第二性征的二型性程度有关。
Sexual dimorphism in body size and ornament is commonly assumed to be a result of sexual selection. Therefore, a pattern among species is expected where the type of mating system correlates with the degree of sexual dimorphism. This was analyzed using comparative data on birds using an autocorrelation model. Mating system did correlate with sexual dimorphism in ornament (tail), but was only weakly correlated with sexual size (tarsus) dimorphism. Polygynous species were significantly larger than monogamous species. After correcting for size, there was no difference in size dimorphism between polygynous and monogamous species. The reverse was true for tail dimorphism; polygynous species exhibited a larger degree of tail dimorphism, but there was no difference in absolute size of the tail. This pattern suggests that an evolutionary change in mating system is associated with a change in overall size, and in degree of dimorphism in secondary sexual traits.