Microbial infection affects egg viability and incubation behavior in a tropical passerine
نویسندگان
چکیده
Mark I. Cook, Steven R. Beissinger, Gary A. Toranzos, Roberto A. Rodriguez, and Wayne J. Arendt Ecosystem Sciences Division, Department of Environmental Science, Policy and Management, 151 Hilgard Hall 3110, University of California, Berkeley, CA 94720, USA, Department of Biology, Box 23360, University of Puerto Rico, San Juan, PR 00931, Puerto Rico, and International Institute of Tropical Forestry, USDA Forest Service, Sabana Research Station, HC 2, Box 6205, Luqillo, PR 00773, Puerto Rico
منابع مشابه
Microbial and environmental effects on avian egg viability: do tropical mechanisms act in a temperate environment?
The viability of freshly laid avian eggs declines after several days of exposure to ambient temperatures above physiological zero, and declines occur faster in tropical than temperate ecosystems. Microbial infection during preincubation exposure has recently been shown as a second cause of egg viability decline in the tropics, but whether microbial processes influence the viability of wild bird...
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Many birds initiate incubation before clutch completion, which results in asynchronous hatching. The ensuing within-brood size disparity often places later-hatched nestlings at a developmental disadvantage, but the functional significance of the timing of the onset of incubation is poorly understood. Early incubation may serve to maintain the viability of early-laid eggs, which declines over ti...
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Embryonic development rates are reflected by the length of incubation period in birds, and these vary substantially among species within and among geographical regions. The incubation periods are consistently shorter in North America (Arizona study site) than in tropical (Venezuela) and subtropical (Argentina) South America based on the study of 83 passerine species in 17 clades. Parents, mothe...
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Avian eggshells harbour microbes shortly after laying, and under appropriate ambient conditions they can multiply rapidly, penetrate through shell pores, infect egg contents and cause embryo mortality. We experimentally examined how incubation affects bacterial processes on the eggshells of pearl-eyed thrashers Margarops fuscatus nesting in tropical montane and lowland forests in Puerto Rico. B...
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