NDLI: How is host egg mimicry maintained in the cuckoo (Cuculus canorus)

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How is host egg mimicry maintained in the cuckoo (Cuculus canorus)

Content Provider	Semantic Scholar
Author	Avilés, Jesús M. Møller, Anders Pape
Copyright Year	2004
Abstract	To investigate the evolutionary mechanism (host specificity vs. random searching) maintaining mimicry between cuckoo egg appearance and that of different European cuckoo Cuculus canorus hosts, we studied the level of mimicry between the appearance of C. canorus eggs and that of their hosts' eggs in different habitats in southern Finland by using ultraviolet-visible reflectance spectrophotometry. In the main habitat used by C. canorus for reproduction, eggs laid in nests of different host species differed in appearance. Host use by C. canorus was not related to the abundance of hosts, and the level of mimicry was not related to host abundance in the habitat. Furthermore, a close match between C. canorus egg appearance and that of host eggs within habitats was detected after removing the potentially confounding effect of host abundance. In the only two suitable host species nesting in trees (namely chaffinch Fringilla coelebs and brambling Fringilla montifringilla) we detected changes in C. canorus egg appearance that paralleled those of the two host species. Thus our findings suggest the existence of a correlation between the appearance of C. canorus eggs and that of their hosts' eggs within different habitat types, and suggest that mimicry is maintained by strict host preferences by each C. canorus female when laying. © 2004 The Linnean Society of London, Biological Journal of the Linnean Society, 2004, 82, 57–68.
Starting Page	57
Ending Page	68
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1111/j.1095-8312.2004.00311.x
Volume Number	82
Alternate Webpage(s)	http://www.eeza.csic.es/Documentos/Publicaciones/Aviles_Moller_BJLS_2004.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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