Effects of temperature and time constraints on the seasonal variation in nest morphology of the Thorn-tailed Rayadito (Aphrastura spinicauda)

Content Provider	Semantic Scholar
Author	Botero-Delgadillo, Esteban Serrano, Daniela Orellana, Nicole Poblete, Yanina Vásquez, R. José Antonio
Copyright Year	2017
Abstract	ABSTRACTEnvironmental adjustment is the most invoked explanation for intra-seasonal variation in bird nest morphology. However, time constraints may also be important, coming as a trade-off between the costs of nest building and the requirement to coincide a breeding attempt with maximal food supply. We describe the seasonal variation in nest morphology of the Thorn-tailed Rayadito (Aphrastura spinicauda) in a sub-Antarctic population in southern Chile, and investigate its relation with the seasonal fluctuation of ambient temperature (an ‘environmental adjustment’ hypothesis) and time constraints (an ‘optimal time frame’ hypothesis). As the breeding season progressed, rayaditos spent fewer days building their nests, built smaller nests, and used less animal-derived insulating material. After statistically removing the effects of daily temperatures on nest building periods and nest morphological measurements, we observed no seasonal trend in the amount of insulating material used, supporting an ‘environmen...
Starting Page	181
Ending Page	187
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1080/01584197.2017.1298400
Volume Number	117
Alternate Webpage(s)	http://repositorio.uchile.cl/bitstream/handle/2250/148954/Effects-of-temperature.pdf?isAllowed=y&sequence=1
Alternate Webpage(s)	https://doi.org/10.1080/01584197.2017.1298400
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article