Do hair-crested drongos reduce prospective territory competition by dismantling their nest after breeding?
Do hair-crested drongos reduce prospective territory competition by dismantling their nest after breeding?
复制标题
毛冠燕鸥在繁殖后拆除巢穴是否会减少潜在的领地竞争？
DOI：
10.1007/s00265-017-2422-1
复制
发表时间：
2017-12
影响因子：
2.3
通讯作者：
Zhengwang Zhang
中科院分区：
文献类型：
--
作者：
Lei Lv;Jianqiang Li;Sjouke A. Kingma;Chang Gao;Yong Wang;Jan Komdeur;Zhengwang Zhang
摘要季节性繁殖的动物经常使用它们之前成功产下幼崽的同一领地。对于这些优质领地来说，种内竞争可能会很激烈，因此，自然选择应该有利于领地所有者的行为，以减少这种竞争。毛冠燕雀 (Dicrurus hottentotus) 是一种忠实于领地的迁徙雀形目鸟类，在繁殖后会拆除巢穴。由于未拆除的巢穴通常会保持完好无损，直到下一个繁殖季节，我们假设拆除巢穴的目的是减少同种动物的领地竞争，这些同种动物可能会利用巢穴的存在作为明年选择合适领地的线索。在这里，我们对这种“领土竞争假说”进行了首次实验测试。我们的研究结果表明，与失败的繁殖配对（通常在明年迁移到另一个领地）相比，成功的配对（通常在明年重复使用其领地）更有可能拆除巢穴，并且拆除速度更快。在成功的地区试验性地放置的强化天然巢穴吸引了探矿者。但次年这些领地的侵占率较低，并不高于拆除巢穴的领地。此外，返回的强化巢主人不会稍后开始繁殖或产生较少的雏鸟，这表明潜在的更激烈的领地竞争不会影响它们的繁殖。总而言之，我们的结果仅部分支持“领土竞争假说”。我们认为，拆除巢穴可能只在领地竞争非常激烈的年份对燕鸥有利。意义陈述季节性繁殖动物可能面临种内对优质领地的竞争。成功的个体经常重复使用他们的领地，但他们是否可以通过隐藏繁殖地点（例如巢穴）来减少潜在的领地竞争却很少被研究。我们进行了一项实验，测试中型雀形目鸟类是否会通过在繁殖后摧毁巢穴、向其他个体隐瞒其对领地的选择来降低领地竞争的潜在成本。如果领地所有者更有可能重新利用领地，他们就会在巢穴拆除上投入更多资金。然而，它们仍然能够保留以前的领地，并且如果不拆除它们的巢穴，繁殖成功率也不会降低。我们认为，只有当领地竞争非常激烈时，个体才能通过拆除巢穴来掩盖同种繁殖栖息地选择的公共信息，从而受益。
AbstractAnimals that breed seasonally often use the same territory where they successfully produced young previously. Intra-specific competition may be intense for these high-quality territories, and therefore, natural selection should favour behaviour of territory owners to reduce such competition. Hair-crested drongos,Dicrurus hottentottus, a territory-faithful migratory passerine, dismantle their nests after breeding. As undismantled nests usually remain intact until the next breeding season, we hypothesised that nest dismantling serves the purpose of reducing territory competition from conspecifics that may use the presence of a nest as a cue to select suitable territories in the next year. Here, we provide the first experimental test of this “territory competition hypothesis”. Our results show that successful pairs, who often reuse their territories in the next year, were more likely to dismantle their nests and tended to dismantle faster compared to failed breeding pairs who often moved to another territory in the next year. Strengthened natural nests that were experimentally placed in successful territories attracted prospectors. However, the usurpation rate of those territories in the following year was low and not higher than that of territories where nests were dismantled. Furthermore, returned strengthened-nest owners did not initiate breeding later or produce fewer fledglings suggesting that potential higher territory competition did not affect their reproduction. Altogether, our results only partially support the “territory competition hypothesis”. We suggest that nest dismantling may only be beneficial to drongos in years when territory competition is very intense.Significance statementSeasonal-breeding animals may face intra-specific competition for high-quality territories. Successful individuals often reuse their territory, but whether they can reduce prospective territory competition through hiding breeding locations (e.g. nests) has rarely been studied. We conducted an experiment to test whether a medium-sized passerine reduces the potential costs of territory competition by destroying their nest after breeding, concealing their selection of territory to other individuals. Territory owners invested more in nest dismantling if they were more likely to reuse the territory. However, they were still able to retain their previous territory and did not have a lower reproductive success if their nest was not dismantled. We suggest that individuals may only benefit from masking public information of breeding habitat selection from conspecifics by dismantling their nest when territory competition is very intense.
登录
查看更多内容
影响因子：
1.2
作者：
T. Mazgajski
通讯作者：
T. Mazgajski
影响因子：
2.5
作者：
Doligez, B;Pärt, T;Danchin, E
通讯作者：
Danchin, E
影响因子：
2.5
作者：
W. Piper;Keren B. Tischler;Margaret Klich
通讯作者：
W. Piper;Keren B. Tischler;Margaret Klich
影响因子：
2.5
作者：
Calabuig, Gustau;Ortego, Joaquin;Cordero, Pedro J.
通讯作者：
Cordero, Pedro J.
影响因子：
1.9
作者：
Boulinier, T;Danchin, E
通讯作者：
Danchin, E