Egg-Size Investment in a Bird with Uniparental Incubation by Both Sexes

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dc.contributor.author Skrade, Paul
dc.contributor.author Dinsmore, Stephen
dc.contributor.author Dinsmore, Stephen
dc.contributor.department Natural Resource Ecology and Management
dc.date 2018-02-15T20:56:48.000
dc.date.accessioned 2020-06-30T06:13:33Z
dc.date.available 2020-06-30T06:13:33Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2013
dc.date.embargo 2015-02-27
dc.date.issued 2013-01-01
dc.description.abstract <p>The Mountain Plover (Charadrius montanus) has an uncommon parental care system in which males and females tend separate nests. To improve their fitness in this system, females have the opportunity to allocate their reproductive investment to male-tended nests and their own nests differently. To examine investment we measured dimensions of plover eggs in Phillips County, Montana, and calculated their volumes. We modeled possible differences in egg volume in male- and female-incubated nests in relation to the effects of sex of the incubating adult, Julian day of nest initiation, and drought conditions. We measured >1000 eggs from 194 nests tended by 131 females and from 213 nests of 148 males. Male- and female-incubated eggs had similar mean volumes (13.20 versus 13.17 cm3, respectively) but differed significantly across the breeding season. The eggs in female-incubated nests tended to be larger than those in male-incubated nests early in the breeding season but were smaller as the season progressed, while the volume of male-incubated eggs peaked in the middle of the season. Egg volumes were affected by drought conditions, being larger during the driest periods of this study. Volumes within a nest were similar and were not influenced by the age of the incubating adult. Larger eggs tended to produce larger chicks. The similarity in the size of Mountain Plover eggs, even between male- and female-incubated nests and under different environmental conditions, provides evidence for stability of this uncommon system of parental care.</p>
dc.description.comments <p>This article is from <em>Condor</em> 115: 508, doi:10.1525/cond.2013.120014. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/nrem_pubs/37/
dc.identifier.articleid 1033
dc.identifier.contextkey 6742958
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath nrem_pubs/37
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/56382
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/nrem_pubs/37/2013_Dinsmore_EggSizeInvestment.pdf|||Fri Jan 14 23:49:10 UTC 2022
dc.source.uri 10.1525/cond.2013.120014
dc.subject.disciplines Developmental Biology
dc.subject.disciplines Natural Resources Management and Policy
dc.subject.disciplines Ornithology
dc.subject.disciplines Population Biology
dc.subject.disciplines Poultry or Avian Science
dc.subject.keywords Charadrius montanus
dc.subject.keywords egg size
dc.subject.keywords maternal investment
dc.subject.keywords Mountain Plover
dc.subject.keywords uniparental care
dc.title Egg-Size Investment in a Bird with Uniparental Incubation by Both Sexes
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 93cc6656-8f88-4982-be9c-06bedefca35f
relation.isOrgUnitOfPublication e87b7b9d-30ea-4978-9fb9-def61b4010ae
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