Thermal adaptation of maternal and embryonic phenotypes in a geographically widespread ectotherm

Michael Angilletta, Christopher E. Oufiero, Michael W. Sears

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Current theories predict the thermal adaptation of both maternal and embryonic phenotypes such that the fitness of the entire life cycle is maximized. Our studies of the eastern fence lizard (Sceloporus undulatus) have generated evidence that maternal and embryonic phenotypes are designed to promote growth and development in cold environments. Females in colder environments allocate more energy per egg enabling offspring to grow faster and reach a larger size at hatching. Females in cold environments also nest exclusively in warm, open sites that maximize rates of embryonic growth and development, although this behavior involves risky migrations. Likewise, thermal adaptation of embryonic physiology also promotes growth and development in cold environments. When incubated in the laboratory under shared environmental conditions, embryos from colder environments developed faster and grew more efficiently than embryos from warmer environments, which is a pattern called counter-gradient variation. Because thermal adaptation can produce geographic variation in a suite of maternal and embryonic phenotypes, biologists should develop theories of coadaptation that consider costs and benefits of behavioral and physiological strategies at both stages of the life cycle.

Original languageEnglish (US)
Pages (from-to)258-266
Number of pages9
JournalInternational Congress Series
Volume1275
DOIs
StatePublished - Dec 2004
Externally publishedYes

Fingerprint

Mothers
Phenotype
Growth and Development
Life Cycle Stages
Embryonic Structures
Lizards
Cost-Benefit Analysis
Embryonic Development
Ovum
Thermotolerance

Keywords

  • Counter-gradient variation
  • Egg size
  • Embryo
  • Growth
  • Nesting
  • Temperature

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Thermal adaptation of maternal and embryonic phenotypes in a geographically widespread ectotherm. / Angilletta, Michael; Oufiero, Christopher E.; Sears, Michael W.

In: International Congress Series, Vol. 1275, 12.2004, p. 258-266.

Research output: Contribution to journalArticle

@article{566a67a3edd74326929917bdfd5e0c94,
title = "Thermal adaptation of maternal and embryonic phenotypes in a geographically widespread ectotherm",
abstract = "Current theories predict the thermal adaptation of both maternal and embryonic phenotypes such that the fitness of the entire life cycle is maximized. Our studies of the eastern fence lizard (Sceloporus undulatus) have generated evidence that maternal and embryonic phenotypes are designed to promote growth and development in cold environments. Females in colder environments allocate more energy per egg enabling offspring to grow faster and reach a larger size at hatching. Females in cold environments also nest exclusively in warm, open sites that maximize rates of embryonic growth and development, although this behavior involves risky migrations. Likewise, thermal adaptation of embryonic physiology also promotes growth and development in cold environments. When incubated in the laboratory under shared environmental conditions, embryos from colder environments developed faster and grew more efficiently than embryos from warmer environments, which is a pattern called counter-gradient variation. Because thermal adaptation can produce geographic variation in a suite of maternal and embryonic phenotypes, biologists should develop theories of coadaptation that consider costs and benefits of behavioral and physiological strategies at both stages of the life cycle.",
keywords = "Counter-gradient variation, Egg size, Embryo, Growth, Nesting, Temperature",
author = "Michael Angilletta and Oufiero, {Christopher E.} and Sears, {Michael W.}",
year = "2004",
month = "12",
doi = "10.1016/j.ics.2004.07.038",
language = "English (US)",
volume = "1275",
pages = "258--266",
journal = "International Congress Series",
issn = "0531-5131",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Thermal adaptation of maternal and embryonic phenotypes in a geographically widespread ectotherm

AU - Angilletta, Michael

AU - Oufiero, Christopher E.

AU - Sears, Michael W.

PY - 2004/12

Y1 - 2004/12

N2 - Current theories predict the thermal adaptation of both maternal and embryonic phenotypes such that the fitness of the entire life cycle is maximized. Our studies of the eastern fence lizard (Sceloporus undulatus) have generated evidence that maternal and embryonic phenotypes are designed to promote growth and development in cold environments. Females in colder environments allocate more energy per egg enabling offspring to grow faster and reach a larger size at hatching. Females in cold environments also nest exclusively in warm, open sites that maximize rates of embryonic growth and development, although this behavior involves risky migrations. Likewise, thermal adaptation of embryonic physiology also promotes growth and development in cold environments. When incubated in the laboratory under shared environmental conditions, embryos from colder environments developed faster and grew more efficiently than embryos from warmer environments, which is a pattern called counter-gradient variation. Because thermal adaptation can produce geographic variation in a suite of maternal and embryonic phenotypes, biologists should develop theories of coadaptation that consider costs and benefits of behavioral and physiological strategies at both stages of the life cycle.

AB - Current theories predict the thermal adaptation of both maternal and embryonic phenotypes such that the fitness of the entire life cycle is maximized. Our studies of the eastern fence lizard (Sceloporus undulatus) have generated evidence that maternal and embryonic phenotypes are designed to promote growth and development in cold environments. Females in colder environments allocate more energy per egg enabling offspring to grow faster and reach a larger size at hatching. Females in cold environments also nest exclusively in warm, open sites that maximize rates of embryonic growth and development, although this behavior involves risky migrations. Likewise, thermal adaptation of embryonic physiology also promotes growth and development in cold environments. When incubated in the laboratory under shared environmental conditions, embryos from colder environments developed faster and grew more efficiently than embryos from warmer environments, which is a pattern called counter-gradient variation. Because thermal adaptation can produce geographic variation in a suite of maternal and embryonic phenotypes, biologists should develop theories of coadaptation that consider costs and benefits of behavioral and physiological strategies at both stages of the life cycle.

KW - Counter-gradient variation

KW - Egg size

KW - Embryo

KW - Growth

KW - Nesting

KW - Temperature

UR - http://www.scopus.com/inward/record.url?scp=33748509948&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748509948&partnerID=8YFLogxK

U2 - 10.1016/j.ics.2004.07.038

DO - 10.1016/j.ics.2004.07.038

M3 - Article

AN - SCOPUS:33748509948

VL - 1275

SP - 258

EP - 266

JO - International Congress Series

JF - International Congress Series

SN - 0531-5131

ER -