Baldassarre Daniel T, Greig Emma I, Webster Michael S
Cornell Lab of Ornithology, Cornell University, Ithaca, NY 14850, USA Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14850, USA
Cornell Lab of Ornithology, Cornell University, Ithaca, NY 14850, USA.
Biol Lett. 2016 Feb;12(2):20151025. doi: 10.1098/rsbl.2015.1025.
When individuals mate outside the pair bond, males should employ behaviours such as aggression or vocal displays (e.g. duetting) that help assure paternity of the offspring they care for. We tested whether male paternity was associated with aggression or duetting in the red-backed fairy-wren, a species exhibiting high rates of extra-pair paternity. During simulated territorial intrusions, aggression and duetting were variable among and repeatable within males, suggesting behavioural consistency of individuals. Males with quicker and stronger duet responses were cuckolded less often than males with slower and weaker responses. In contrast, physical aggression was not correlated with male paternity. These results suggest that either acoustic mate guarding or male-female vocal negotiations via duetting lead to increased paternity assurance, whereas physical aggression does not.
当个体在配偶关系之外进行交配时，雄性应采取诸如攻击或发声展示（如二重唱）等行为，以帮助确保它们所照料后代的父权。我们测试了在红背细尾鹩莺（一种具有高比例婚外父权的物种）中，雄性的父权是否与攻击行为或二重唱有关。在模拟领地入侵期间，雄性之间的攻击行为和二重唱行为存在差异，且个体内部具有重复性，这表明个体行为具有一致性。二重唱反应更快更强的雄性被戴绿帽的频率低于反应较慢较弱的雄性。相比之下，身体攻击行为与雄性父权并无关联。这些结果表明，要么是声学配偶守卫，要么是通过二重唱进行的雌雄发声协商，都会导致父权保障的增加，而身体攻击行为则不然。
