Peterson, S.H., and Ackerman, J.T., 2024, Eggshell thickness in 5 songbird species: U.S. Geological Survey data release, https://doi.org/10.5066/P9GL21VQ.
Summary
Eggshell thickness was measured at the egg equator and sharp pole for 5 songbird species. Each egg has thickness measurements at two locations on the egg and the corresponding egg length, egg width, egg volume, relative incubation age, egg identification, and nest identification. These data support the following publication: Schacter, C.R., Peterson, S.H., Hartman, C.A., Herzog, M.P., and Ackerman, J.T., 2024. Eggshell thickness and egg morphometrics in five songbird species from the Central Valley, California. Journal of Field Ornithology, 95(1), p.3. https://doi.org/10.5751/JFO-00410-950103.
Summary
Eggshell thickness was measured at the egg equator and sharp pole for 5 songbird species. Each egg has thickness measurements at two locations on the egg and the corresponding egg length, egg width, egg volume, relative incubation age, egg identification, and nest identification.
These data support the following publication:
Schacter, C.R., Peterson, S.H., Hartman, C.A., Herzog, M.P., and Ackerman, J.T., 2024. Eggshell thickness and egg morphometrics in five songbird species from the Central Valley, California. Journal of Field Ornithology, 95(1), p.3. https://doi.org/10.5751/JFO-00410-950103.
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Purpose
Eggshell thicknesses were measured to provide more precise and repeatable estimates for 5 songbird species, using a hall effect thickness gauge instead of an analog or digital micrometer. We used these data to relate eggshell thickness to egg morphometrics (egg length, width, and volume), and embryonic development.