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首页> 外文期刊>Behavioral Ecology and Sociobiology >Correlates of male mating success in great bustard leks: the effects of age, weight, and display effort
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Correlates of male mating success in great bustard leks: the effects of age, weight, and display effort

机译：大bus鱼雄性交配成功的相关因素：年龄，体重和展示努力的影响

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摘要

We examined how mating success varied in relation to age, weight, body size, and display behavior among great bustard Otis tarda males. The estimated mating success was strongly skewed, with 45% of adult males being involved in copulation attempts and only 9.7% actually seen copulating successfully. Unlike most birds, body size continued increasing in great bustards several years after reaching sexual maturity. Age, weight, and display effort were all significant and independent predictors of male mating success. The higher display effort involved performing longer full-display bouts. Older males could detach from the male flock earlier in the season as well as on each day and spend longer seasonal and daily periods displaying as solitary birds, which contributed to increase their mating success. In contrast, males weighing more did not invest more in display, which suggests that they could be recognized as dominants by other males and selected by females through assessment of their plumage sexual traits. In contrast to most other bird species, the system described for great bustards resembles that found in some lek-mating ungulates, where social rank is a complex trait determined by both age and mass, and as in these mammals, it suggests that sexual selection continues to favor a high male weight in this extremely sexually dimorphic species.
机译：我们研究了雄性bus鸟Otis tarda雄性的交配成功率与年龄，体重，体型和展示行为之间的关系。估计的交配成功率严重偏高，其中有45％的成年男性参与了交配尝试，而实际交配成功的只有9.7％。与大多数鸟类不同，成年后数年，大型bus的体型继续增加。年龄，体重和展示力都是男性交配成功的重要且独立的指标。较高的显示效果涉及执行更长的全屏显示回合。年龄较大的雄性可能在本季节以及每天的早些时候从雄性羊群中分离出来，并花费更长的季节和日常时间作为单独的鸟类进行展示，这有助于增加其交配的成功率。相反，体重较重的雄性并没有在展示上投入更多，这表明其他雄性可将其视为优势，而雌性可通过评估其全身羽毛的性状来选择它们。与大多数其他鸟类相比，描述的大型bus鸟系统类似于一些韭菜有蹄类动物，它们的社会地位是由年龄和质量决定的复杂特征，就像在这些哺乳动物中一样，这表明性选择仍在继续。在这种极具性别异性的物种中，男性体重偏高。

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