摘要
Avian brood parasitism constitutes a classical model for studying coevolution.The discovery and reporting of cuckoo parasitism on various new hosts contribute to a deeper comprehension of the coevolutionary relationships between these parasites and their hosts.This study involved field monitoring of the black-browed reed warbler(Acrocephalus bistrigiceps,BRW)in a reed wetland of northeast China during the breeding seasons for 13 consecutive years(2012-2024).A total of 677 BRW nests were monitored,and only three cases of cuckoo parasitism were detected,for a parasitism rate of 0.44%.An egg recognition experiment indicated that the BRW possesses a relatively strong egg recognition ability and can effectively reject foreign parasitic eggs.The color characteristics of common cuckoo and BRW eggs are considerably different.Through the analysis and comparison of egg color spectra between cuckoo and warbler eggs,combined with the field cuckoo parasitism rate and egg recognition ability of warblers,we concluded that the BRW is not a commonly used host for the common cuckoo.
鸟类巢寄生是研究协同进化的经典模型,发现和报道新增宿主,有助于人们进一步理解物种间的协同进化关系和丰富巢寄生理论。本研究连续13年(2012—2024年)在鸟类繁殖季期间,对黑龙江扎龙保护区及吉林四方坨子芦苇湿地的黑眉苇莺(Acrocephalus bistrigiceps)进行了野外繁殖监测,观察大杜鹃(Cuculus canorus)对其巢寄生情况,同时从卵识别能力和卵色光谱角度分析两者的寄生关系。研究期间共监测到黑眉苇莺677巢,共发现3巢寄生的案例,寄生率为0.44%;卵识别实验检测结果证明黑眉苇莺对外来寄生卵具有较强的识别能力,并能有效地拒绝寄生卵;卵色光谱的测量显示出两者在卵色上完全不同,表现为在可见光区的反射值存在显著性差异。经过卵色光谱和卵识别能力分析对比,结合野外寄生率,发现黑眉苇莺不是大杜鹃的合适宿主。
基金
The National Natural Science Foundation of China(32260253)
The Guizhou Natural Science Foundation(ZK[2022]-316)。
