REJECTION OF CUCKOO EGGS IN RELATION TO HOST AGE - A POSSIBLE EVOLUTIONARY EQUILIBRIUM
REJECTION OF CUCKOO EGGS IN RELATION TO HOST AGE - A POSSIBLE EVOLUTIONARY EQUILIBRIUM
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DOI：
10.1093/beheco/3.2.128
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发表时间：
1992-06-01
影响因子：
2.4
通讯作者：
ZAHAVI, A
中科院分区：
文献类型：
--
作者：
LOTEM, A;NAKAMURA, H;ZAHAVI, A
因为接受普通杜鹃（Cuculus canorus）产的寄生卵的寄主不太可能给自己的后代长羽翼，所以排斥应该是一种适应性反应。杜鹃寄主物种只获得中等排斥率的证据通常被解释为进化滞后的结果。然而，我们发现雌性大苇莺（Acrocephalus arundinaceus）对杜鹃卵的接受主要发生在宿主种群的年轻繁殖者中。我们认为，由于天真的繁殖者需要学会可靠地识别自己的卵子，而不是代表进化滞后，宿主群体中可能会出现某种程度的接受。
Because hosts that accept a parasitic egg laid by the common cuckoo, Cuculus canorus, are unlikely to fledge their own offspring, rejection should be an adaptive response. Evidence that cuckoo host species attain only intermediate rates of rejection are commonly interpreted as resulting from an evolutionary lag. Yet, we found that the acceptance of cuckoo eggs by female great reed warblers, Acrocephalus arundinaceus, occurs mainly among the younger breeders in the host population. We suggest that some level of acceptance can arise in the host population as a result of the need of naive breeders to learn to reliably recognize their own eggs rather than representing evolutionary lag.