EQUALITY OF FEEDING ROLES AND THE MAINTENANCE OF MONOGAMY IN TREE SWALLOWS
EQUALITY OF FEEDING ROLES AND THE MAINTENANCE OF MONOGAMY IN TREE SWALLOWS
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DOI：
10.1007/bf00290823
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发表时间：
1986-01-01
影响因子：
2.3
通讯作者：
ROBERTSON, RJ
中科院分区：
文献类型：
--
作者：
LEFFELAAR, D;ROBERTSON, RJ
通过对36个巢中雏鸟食物传递速率的测量，研究了雌雄树燕的劳动分工。通过观察自然巢和执行育雏操作，我们发现，男性和女性的喂养职责平均分配，并作出类似的反应，育雏大小和年龄的变化。摄食率与育雏质量的相关性最高。操纵和移除实验表明，可以引起增加的摄食率，但仅在有限的时间内。雄性和雌性树燕只能部分补偿喂养雏鸟时，配偶被删除。这一点，沿着较高的死亡率在扩大育雏和单亲提出的，表明男性和女性都需要提高整个育雏羽翼丰满。我们认为，这一要求有助于没有配偶守卫和维持一夫一妻制的树燕。
We investigated the division of labor in male and female tree swallows by measuring the rate of food delivery to nestlings at 36 nests. By observing natural nests and performing brood manipulations we found that males and females divided the feeding duties about equally and responded similarly to changes in brood size and age. Feeding rate was most highly correlated with brood mass. Manipulation and removal experiments showed that increased feeding rates could be elicited, but only for limited periods of time. Male and female tree swallows could only partially compensate in feeding nestlings when mates were removed. This, along with the higher mortality in enlarged broods and in those raised by single parents, indicates that both male and female are required to raise an entire brood to fledging. We argue that this requirement contributes to the absence of mate guarding and the maintenance of monogamy in the tree swallow.