Intraspecific brood parasitism can increase the number of eggs that an individual lays in its own nest
Intraspecific brood parasitism can increase the number of eggs that an individual lays in its own nest
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种内巢寄生可以增加个体在自己巢中产卵的数量
DOI：
10.1098/rspb.2002.2125
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Broom
中科院分区：
文献类型：
--
作者：
G. Ruxton;M. Broom
种内育雏寄生是指在同一物种的另一个个体的巢中产卵，而随后不照顾卵或孵化。当个体躺在自己的巢中以及寄生时，以前的作品预测，与没有寄生的同等情况相比，寄生会导致在个体自己的巢中产下更少的蛋。这是预测发生，以减少寄生奠定个人的竞争的影响，因为寄生可以用来减少兄弟姐妹之间的竞争。在这里，我们提出了这种情况的定量模型。该模型表明，育雏减少的预测并不普遍成立。对于一些合理的参数组合，寄生引起的增加，而不是减少在自己的巢中的鸡蛋由一个单独的数量。这是因为寄生成为一种利润较低的策略，因为巢内竞争加剧，巢主会产下更多的蛋。增加窝卵数也会增加宿主自己后代之间的竞争，但如果诱导的寄生减少足够，仍然是有利的。
Intraspecific brood parasitism involves laying eggs in the nest of another individual of the same species without subsequently caring for the eggs or hatchlings. Where individuals lay in their own nest as well as parasitically, previous works predicted that parasitism leads to fewer eggs being laid in an individual's own nest, compared with the equivalent situation without parasitism. This is predicted to occur both to reduce the effects of competition from parasitically laid individuals and because parasitism can be used to reduce competition between siblings. Here, we present a quantitative model of this situation. This model indicates that the brood–reduction prediction does not hold universally. For some plausible parameter combinations, parasitism causes an increase rather than a decrease in the number of eggs laid by an individual in its own nest. This occurs because parasitism becomes a less profitable tactic as more eggs are laid by nest owners due to increasing within–nest competition. Increasing clutch size will also increase competition between the host's own offspring, but can still be advantageous if the induced reduction in parasitism is sufficient.