Suppr超能文献

群居繁殖的华丽细尾鹩莺(Malurus cyaneus)雄性生殖队列的人口统计学

Demography of male reproductive queues in cooperatively breeding superb fairy-wrens Malurus cyaneus.

作者信息

Cockburn Andrew, Osmond Helen L, Mulder Raoul A, Double Michael C, Green David J

机构信息

Evolutionary Ecology Group, School of Botany and Zoology, Australian National University, Canberra ACT 0200 Australia.

出版信息

J Anim Ecol. 2008 Mar;77(2):297-304. doi: 10.1111/j.1365-2656.2007.01335.x. Epub 2007 Dec 7.

Abstract
  1. Subordinate helpers in cooperative societies may gain both immediate and future benefits, including paternity and territorial inheritance. However, if such opportunities correlate with rank in the queue, it is unclear why such queues should be stable. 2. In cooperatively breeding superb fairy-wrens Malurus cyaneus, only males are generally philopatric, and form stable hierarchical queues for the dominant position. 3. Male opportunities for reproduction are influenced both by their dominance status within the group, and their relatedness to the breeding female. For young queuing subordinates, the breeding female is typically their mother. Because of incest avoidance, reproduction is possible only through extra-group mating, even if the dominant position is achieved while the mother is still on the territory. If the mother dies while the helper is still a subordinate, he can seek matings both outside the group, and with the unrelated replacement female within the group. Finally, males can achieve the dominant position and pair with an unrelated female by inheritance, dispersal to a neighbouring vacancy, or by forming a liaison with an immigrant subordinate female that causes fission of the natal territory. 4. On average males spent more time living with unrelated females than with their mother. Subordinate males gained no survival advantages when living with their mother rather than an unrelated female, contrary to the prediction that parents facilitate the survival of their offspring. 5. Dominants and subordinates also had similar survival. Mortality accelerated over time, probably because older males invest more in extra-group courtship display. 6. Fairy-wren queues are likely to be stable because older birds are superior, and because extra-pair mating provides direct benefits to subordinates.
摘要
  1. 在合作性社会群体中,从属帮手可能会获得即时和未来的利益,包括父权和领地继承。然而,如果这些机会与排队顺序相关,那么尚不清楚为何这样的排队顺序应该是稳定的。2. 在合作繁殖的华丽细尾鹩莺(Malurus cyaneus)中,通常只有雄性留居原地,并形成稳定的等级队列以争夺主导地位。3. 雄性的繁殖机会既受其在群体中的优势地位影响,也受其与繁殖雌鸟的亲缘关系影响。对于排队的年轻从属者来说,繁殖雌鸟通常是他们的母亲。由于避免近亲繁殖,即使在母亲仍在领地时获得了主导地位,繁殖也只能通过与群体外的雌性交配来实现。如果帮手仍是从属者时母亲去世,他既可以在群体外寻找配偶,也可以与群体内无亲缘关系的替代雌鸟交配。最后,雄性可以通过继承、扩散到相邻的空缺领地,或者与导致出生地领地分裂的移民从属雌鸟建立联系来获得主导地位并与无亲缘关系的雌鸟配对。4. 平均而言,雄性与无亲缘关系的雌鸟生活在一起的时间比与母亲在一起的时间更长。与预测的父母会促进后代生存相反,从属雄性与母亲而非无亲缘关系的雌鸟生活在一起时并没有获得生存优势。5. 主导者和从属者的存活率也相似。死亡率随时间加速上升,可能是因为年龄较大的雄性在群体外求偶展示上投入更多。6. 细尾鹩莺的队列可能是稳定的,因为年长的鸟类更具优势,而且额外配对交配为从属者提供了直接利益。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验