Sex and Incubation Temperature Independently Affect Embryonic Development and Offspring Size in a Turtle with Temperature-Dependent Sex Determination

dc.contributor.author Warner, Daniel
dc.contributor.author Mitchell, Timothy
dc.contributor.author Bodensteiner, Brooke
dc.contributor.author Janzen, Fredric
dc.contributor.department Department of Ecology, Evolution, and Organismal Biology (CALS)
dc.date 2019-12-09T16:05:14.000
dc.date.accessioned 2020-06-30T02:18:35Z
dc.date.available 2020-06-30T02:18:35Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2019
dc.date.embargo 2021-01-01
dc.date.issued 2020-01-01
dc.description.abstract <p>Developmental environments can have lasting effects on an individual’s phenotype. In many reptiles, for example, egg incubation temperature permanently determines offspring sex (temperature-dependent sex determination, TSD) and also influences a suite of morphological, physiological, and behavioral traits. Thus, the contributions of sex and incubation temperature to phenotypic variation are difficult to identify because these factors are confounded under TSD. We used chemical manipulations to experimentally decouple gonadal sex and incubation temperature in a turtle with TSD (<em>Chrysemys picta</em>) to examine their relative and interactive effects on variation in incubation duration and offspring size. We show that warm incubation temperature accelerates development as expected and that exogenous estradiol treatment to eggs further shortens incubation duration across all incubation temperatures. Moreover, estradiol unexpectedly induced male development, resulting in male offspring hatching sooner than female offspring. Variation in offspring size was also influenced by incubation temperature and gonadal sex, but interactions between these two variables were relatively small or nonsignificant. The fitness consequences of these effects are unknown, but we provide preliminary results from our attempts at examining the long-term and sex-specific effects of incubation temperature. Manipulative experimental approaches, combined with longer-term experiments that track individuals through reproduction, will provide novel insights into the adaptive significance of developmental plasticity in long-lived organisms.</p>
dc.description.comments <p>This article is published as Warner, Daniel, Timothy Mitchell, Brooke Bodensteiner, and Fredric Janzen. "Sex and incubation temperature independently affect embryonic development and offspring size in a turtle with temperature-dependent sex determination." 93 (2020): 62-74. doi: <a href="http://dx.doi.org/10.1086/706786" target="_blank">10.1086/706786</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/eeob_ag_pubs/385/
dc.identifier.articleid 1391
dc.identifier.contextkey 15955607
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath eeob_ag_pubs/385
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/23270
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/eeob_ag_pubs/385/0-Supplemental_Material.pdf|||Fri Jan 14 23:53:37 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/eeob_ag_pubs/385/1-University_of_Chicago_Press_Journals__T...pdf|||Fri Jan 14 23:53:36 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/eeob_ag_pubs/385/2019_Janzen_SexIncubation.pdf|||Fri Jan 14 23:53:39 UTC 2022
dc.source.uri 10.1086/706786
dc.subject.disciplines Animal Sciences
dc.subject.disciplines Ecology and Evolutionary Biology
dc.subject.disciplines Population Biology
dc.subject.keywords aromatase
dc.subject.keywords Chrysemys picta
dc.subject.keywords Charnov-Bull model
dc.subject.keywords developmental plasticity
dc.subject.keywords developmental rate hypothesis
dc.subject.keywords estradiol
dc.subject.keywords exogenous steroids
dc.subject.keywords painted turtle
dc.subject.keywords survival
dc.supplemental.bitstream Supplemental_Material.pdf
dc.title Sex and Incubation Temperature Independently Affect Embryonic Development and Offspring Size in a Turtle with Temperature-Dependent Sex Determination
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 266cafbc-b90b-45b5-9c6d-d5914fff458b
relation.isOrgUnitOfPublication 6fa4d3a0-d4c9-4940-945f-9e5923aed691
File
Original bundle
Now showing 1 - 3 of 3
No Thumbnail Available
Name:
2019_Janzen_SexIncubation.pdf
Size:
683.93 KB
Format:
Adobe Portable Document Format
Description:
No Thumbnail Available
Name:
0-Supplemental_Material.pdf
Size:
1.15 MB
Format:
Adobe Portable Document Format
Description:
No Thumbnail Available
Name:
1-University_of_Chicago_Press_Journals__T...pdf
Size:
407.64 KB
Format:
Adobe Portable Document Format
Description:
Collections