Corticosterone manipulation reveals differences in hierarchical organization of multidimensional reproductive trade-offs in r-strategist and K-strategist females

L. T. Lancaster, L. C. Hazard, J. Clobert, B. R. Sinervo

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Life history trade-offs are often hierarchical with decisions at one level affecting lower level trade-offs. We investigated trade-off structure in female side-blotched lizards (Uta stansburiana), which exhibit two evolved strategies: yellow-throated females are K-strategists and orange-throated are r-strategists. Corticosterone treatment was predicted to differentially organize these females' reproductive decisions. Corticosterone-treated yellow females suppressed reproduction but survived well, and augmented egg mass without decreasing clutch size. Conversely, corticosterone enhanced mortality and reproductive rates in orange females, and increased egg mass only after lengthy exposure. Corticosterone did not affect post-laying condition, suggesting that corticosterone increased egg mass through enhanced energy acquisition (income breeding). Corticosterone enhanced survival of lightweight females, but decreased survival of heavy females, introducing a foraging vs. predation trade-off. We conclude that rather than being a direct, functional relationship, observed trade-offs between offspring size and number represent evolved differences in hierarchical organization of multidimensional trade-offs, particularly in response to stress.

Original languageEnglish
Pages (from-to)556-565
Number of pages10
JournalJournal of Evolutionary Biology
Volume21
Issue number2
DOIs
StatePublished - 1 Mar 2008

Fingerprint

corticosterone
egg masses
egg
trade-off
clutch size
lizard
lizards
stress response
income
life history
predation
breeding
foraging
mortality
energy

Keywords

  • Endocrine hormones
  • Income vs. capital breeding
  • Life history strategy
  • Offspring quantity vs. quality
  • Polymorphism
  • Predation vs. foraging
  • R- vs. K-selection
  • Reptile
  • Stress
  • Survival vs. reproduction

Cite this

@article{1511f21ab4304a59808aa56ce5721c28,
title = "Corticosterone manipulation reveals differences in hierarchical organization of multidimensional reproductive trade-offs in r-strategist and K-strategist females",
abstract = "Life history trade-offs are often hierarchical with decisions at one level affecting lower level trade-offs. We investigated trade-off structure in female side-blotched lizards (Uta stansburiana), which exhibit two evolved strategies: yellow-throated females are K-strategists and orange-throated are r-strategists. Corticosterone treatment was predicted to differentially organize these females' reproductive decisions. Corticosterone-treated yellow females suppressed reproduction but survived well, and augmented egg mass without decreasing clutch size. Conversely, corticosterone enhanced mortality and reproductive rates in orange females, and increased egg mass only after lengthy exposure. Corticosterone did not affect post-laying condition, suggesting that corticosterone increased egg mass through enhanced energy acquisition (income breeding). Corticosterone enhanced survival of lightweight females, but decreased survival of heavy females, introducing a foraging vs. predation trade-off. We conclude that rather than being a direct, functional relationship, observed trade-offs between offspring size and number represent evolved differences in hierarchical organization of multidimensional trade-offs, particularly in response to stress.",
keywords = "Endocrine hormones, Income vs. capital breeding, Life history strategy, Offspring quantity vs. quality, Polymorphism, Predation vs. foraging, R- vs. K-selection, Reptile, Stress, Survival vs. reproduction",
author = "Lancaster, {L. T.} and Hazard, {L. C.} and J. Clobert and Sinervo, {B. R.}",
year = "2008",
month = "3",
day = "1",
doi = "10.1111/j.1420-9101.2007.01478.x",
language = "English",
volume = "21",
pages = "556--565",
journal = "Journal of Evolutionary Biology",
issn = "1010-061X",
publisher = "Wiley-Blackwell Publishing Ltd",
number = "2",

}

Corticosterone manipulation reveals differences in hierarchical organization of multidimensional reproductive trade-offs in r-strategist and K-strategist females. / Lancaster, L. T.; Hazard, L. C.; Clobert, J.; Sinervo, B. R.

In: Journal of Evolutionary Biology, Vol. 21, No. 2, 01.03.2008, p. 556-565.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Corticosterone manipulation reveals differences in hierarchical organization of multidimensional reproductive trade-offs in r-strategist and K-strategist females

AU - Lancaster, L. T.

AU - Hazard, L. C.

AU - Clobert, J.

AU - Sinervo, B. R.

PY - 2008/3/1

Y1 - 2008/3/1

N2 - Life history trade-offs are often hierarchical with decisions at one level affecting lower level trade-offs. We investigated trade-off structure in female side-blotched lizards (Uta stansburiana), which exhibit two evolved strategies: yellow-throated females are K-strategists and orange-throated are r-strategists. Corticosterone treatment was predicted to differentially organize these females' reproductive decisions. Corticosterone-treated yellow females suppressed reproduction but survived well, and augmented egg mass without decreasing clutch size. Conversely, corticosterone enhanced mortality and reproductive rates in orange females, and increased egg mass only after lengthy exposure. Corticosterone did not affect post-laying condition, suggesting that corticosterone increased egg mass through enhanced energy acquisition (income breeding). Corticosterone enhanced survival of lightweight females, but decreased survival of heavy females, introducing a foraging vs. predation trade-off. We conclude that rather than being a direct, functional relationship, observed trade-offs between offspring size and number represent evolved differences in hierarchical organization of multidimensional trade-offs, particularly in response to stress.

AB - Life history trade-offs are often hierarchical with decisions at one level affecting lower level trade-offs. We investigated trade-off structure in female side-blotched lizards (Uta stansburiana), which exhibit two evolved strategies: yellow-throated females are K-strategists and orange-throated are r-strategists. Corticosterone treatment was predicted to differentially organize these females' reproductive decisions. Corticosterone-treated yellow females suppressed reproduction but survived well, and augmented egg mass without decreasing clutch size. Conversely, corticosterone enhanced mortality and reproductive rates in orange females, and increased egg mass only after lengthy exposure. Corticosterone did not affect post-laying condition, suggesting that corticosterone increased egg mass through enhanced energy acquisition (income breeding). Corticosterone enhanced survival of lightweight females, but decreased survival of heavy females, introducing a foraging vs. predation trade-off. We conclude that rather than being a direct, functional relationship, observed trade-offs between offspring size and number represent evolved differences in hierarchical organization of multidimensional trade-offs, particularly in response to stress.

KW - Endocrine hormones

KW - Income vs. capital breeding

KW - Life history strategy

KW - Offspring quantity vs. quality

KW - Polymorphism

KW - Predation vs. foraging

KW - R- vs. K-selection

KW - Reptile

KW - Stress

KW - Survival vs. reproduction

UR - http://www.scopus.com/inward/record.url?scp=38849096593&partnerID=8YFLogxK

U2 - 10.1111/j.1420-9101.2007.01478.x

DO - 10.1111/j.1420-9101.2007.01478.x

M3 - Article

C2 - 18179517

AN - SCOPUS:38849096593

VL - 21

SP - 556

EP - 565

JO - Journal of Evolutionary Biology

JF - Journal of Evolutionary Biology

SN - 1010-061X

IS - 2

ER -