The energetic and survival costs of growth in free-ranging chipmunks

Vincent Careau*, Patrick Bergeron, Dany Garant, Denis Réale, John R. Speakman, Murray M. Humphries

*Corresponding author for this work

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The growth/survival trade-off is a fundamental aspect of life-history evolution that is often explained by the direct energetic requirement for growth that cannot be allocated into maintenance. However, there is currently no empirical consensus on whether fast-growing individuals have higher resting metabolic rates at thermoneutrality (RMRt) than slow growers. Moreover, the link between growth rate and daily energy expenditure (DEE) has never been tested in a wild endotherm. We assessed the energetic and survival costs of growth in juvenile eastern chipmunks (Tamias striatus) during a year of low food abundance by quantifying post-emergent growth rate (n = 88), RMRt (n = 66), DEE (n = 20), and overwinter survival. Both RMRt and DEE were significantly and positively related to growth rate. The effect size was stronger for DEE than RMRt, suggesting that the energy cost of growth in wild animals is more likely to be related to the maintenance of a higher foraging rate (included in DEE) than to tissue accretion (included in RMRt). Fast growers were significantly less likely to survive the following winter compared to slow growers. Juveniles with high or low RMRt were less likely to survive winter than juveniles with intermediate RMRt. In contrast, DEE was unrelated to survival. In addition, botfly parasitism simultaneously decreased growth rate and survival, suggesting that the energetic budget of juveniles was restricted by the simultaneous costs of growth and parasitism. Although the biology of the species (seed-storing hibernator) and the context of our study (constraining environmental conditions) were ideally combined to reveal a direct relationship between current use of energy and future availability, it remains unclear whether the energetic cost of growth was directly responsible for reduced survival.

Original languageEnglish
Pages (from-to)11-23
Number of pages13
JournalOecologia
Volume171
Issue number1
Early online date13 Jun 2012
DOIs
Publication statusPublished - Jan 2013

Fingerprint

Tamias
resting metabolic rate
energy expenditure
energetics
expenditure
cost
energy
Tamias striatus
growers
parasitism
bot flies
winter
energy costs
wild animals
rate
trade-off
life history
foraging
accretion
environmental conditions

Keywords

  • Allocation
  • BMR
  • Botfly
  • FMR
  • Hoarding

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics

Cite this

Careau, V., Bergeron, P., Garant, D., Réale, D., Speakman, J. R., & Humphries, M. M. (2013). The energetic and survival costs of growth in free-ranging chipmunks. Oecologia, 171(1), 11-23. https://doi.org/10.1007/s00442-012-2385-x

The energetic and survival costs of growth in free-ranging chipmunks. / Careau, Vincent; Bergeron, Patrick; Garant, Dany; Réale, Denis; Speakman, John R.; Humphries, Murray M.

In: Oecologia, Vol. 171, No. 1, 01.2013, p. 11-23.

Research output: Contribution to journalArticle

Careau, V, Bergeron, P, Garant, D, Réale, D, Speakman, JR & Humphries, MM 2013, 'The energetic and survival costs of growth in free-ranging chipmunks', Oecologia, vol. 171, no. 1, pp. 11-23. https://doi.org/10.1007/s00442-012-2385-x
Careau, Vincent ; Bergeron, Patrick ; Garant, Dany ; Réale, Denis ; Speakman, John R. ; Humphries, Murray M. / The energetic and survival costs of growth in free-ranging chipmunks. In: Oecologia. 2013 ; Vol. 171, No. 1. pp. 11-23.
@article{8bcb12bb1afd4a26acbc6d1c6314e55b,
title = "The energetic and survival costs of growth in free-ranging chipmunks",
abstract = "The growth/survival trade-off is a fundamental aspect of life-history evolution that is often explained by the direct energetic requirement for growth that cannot be allocated into maintenance. However, there is currently no empirical consensus on whether fast-growing individuals have higher resting metabolic rates at thermoneutrality (RMRt) than slow growers. Moreover, the link between growth rate and daily energy expenditure (DEE) has never been tested in a wild endotherm. We assessed the energetic and survival costs of growth in juvenile eastern chipmunks (Tamias striatus) during a year of low food abundance by quantifying post-emergent growth rate (n = 88), RMRt (n = 66), DEE (n = 20), and overwinter survival. Both RMRt and DEE were significantly and positively related to growth rate. The effect size was stronger for DEE than RMRt, suggesting that the energy cost of growth in wild animals is more likely to be related to the maintenance of a higher foraging rate (included in DEE) than to tissue accretion (included in RMRt). Fast growers were significantly less likely to survive the following winter compared to slow growers. Juveniles with high or low RMRt were less likely to survive winter than juveniles with intermediate RMRt. In contrast, DEE was unrelated to survival. In addition, botfly parasitism simultaneously decreased growth rate and survival, suggesting that the energetic budget of juveniles was restricted by the simultaneous costs of growth and parasitism. Although the biology of the species (seed-storing hibernator) and the context of our study (constraining environmental conditions) were ideally combined to reveal a direct relationship between current use of energy and future availability, it remains unclear whether the energetic cost of growth was directly responsible for reduced survival.",
keywords = "Allocation, BMR, Botfly, FMR, Hoarding",
author = "Vincent Careau and Patrick Bergeron and Dany Garant and Denis R{\'e}ale and Speakman, {John R.} and Humphries, {Murray M.}",
note = "We thank all field assistants who have helped to collect the data presented in this paper, D. Munro for coordination work, R. Morin for respirometry work, M. Landry-Cuerrier for help in the field with the DLW method, and P. Thompson and P. Redman for isotope analysis. We thank M. Chappell, J. Arendt, R. Nespolo, and an anonymous reviewer for insightful comments on previous drafts. This research was supported by a Qu{\'e}bec FQRNT team grant, NSERC discovery grants to DR, DG, and MMH, and NSERC doctoral scholarships to VC and PB. The costs of the DLW analyses were covered by a NSERC discovery grant to Donald W. Thomas.",
year = "2013",
month = "1",
doi = "10.1007/s00442-012-2385-x",
language = "English",
volume = "171",
pages = "11--23",
journal = "Oecologia",
issn = "0029-8549",
publisher = "Springer",
number = "1",

}

TY - JOUR

T1 - The energetic and survival costs of growth in free-ranging chipmunks

AU - Careau, Vincent

AU - Bergeron, Patrick

AU - Garant, Dany

AU - Réale, Denis

AU - Speakman, John R.

AU - Humphries, Murray M.

N1 - We thank all field assistants who have helped to collect the data presented in this paper, D. Munro for coordination work, R. Morin for respirometry work, M. Landry-Cuerrier for help in the field with the DLW method, and P. Thompson and P. Redman for isotope analysis. We thank M. Chappell, J. Arendt, R. Nespolo, and an anonymous reviewer for insightful comments on previous drafts. This research was supported by a Québec FQRNT team grant, NSERC discovery grants to DR, DG, and MMH, and NSERC doctoral scholarships to VC and PB. The costs of the DLW analyses were covered by a NSERC discovery grant to Donald W. Thomas.

PY - 2013/1

Y1 - 2013/1

N2 - The growth/survival trade-off is a fundamental aspect of life-history evolution that is often explained by the direct energetic requirement for growth that cannot be allocated into maintenance. However, there is currently no empirical consensus on whether fast-growing individuals have higher resting metabolic rates at thermoneutrality (RMRt) than slow growers. Moreover, the link between growth rate and daily energy expenditure (DEE) has never been tested in a wild endotherm. We assessed the energetic and survival costs of growth in juvenile eastern chipmunks (Tamias striatus) during a year of low food abundance by quantifying post-emergent growth rate (n = 88), RMRt (n = 66), DEE (n = 20), and overwinter survival. Both RMRt and DEE were significantly and positively related to growth rate. The effect size was stronger for DEE than RMRt, suggesting that the energy cost of growth in wild animals is more likely to be related to the maintenance of a higher foraging rate (included in DEE) than to tissue accretion (included in RMRt). Fast growers were significantly less likely to survive the following winter compared to slow growers. Juveniles with high or low RMRt were less likely to survive winter than juveniles with intermediate RMRt. In contrast, DEE was unrelated to survival. In addition, botfly parasitism simultaneously decreased growth rate and survival, suggesting that the energetic budget of juveniles was restricted by the simultaneous costs of growth and parasitism. Although the biology of the species (seed-storing hibernator) and the context of our study (constraining environmental conditions) were ideally combined to reveal a direct relationship between current use of energy and future availability, it remains unclear whether the energetic cost of growth was directly responsible for reduced survival.

AB - The growth/survival trade-off is a fundamental aspect of life-history evolution that is often explained by the direct energetic requirement for growth that cannot be allocated into maintenance. However, there is currently no empirical consensus on whether fast-growing individuals have higher resting metabolic rates at thermoneutrality (RMRt) than slow growers. Moreover, the link between growth rate and daily energy expenditure (DEE) has never been tested in a wild endotherm. We assessed the energetic and survival costs of growth in juvenile eastern chipmunks (Tamias striatus) during a year of low food abundance by quantifying post-emergent growth rate (n = 88), RMRt (n = 66), DEE (n = 20), and overwinter survival. Both RMRt and DEE were significantly and positively related to growth rate. The effect size was stronger for DEE than RMRt, suggesting that the energy cost of growth in wild animals is more likely to be related to the maintenance of a higher foraging rate (included in DEE) than to tissue accretion (included in RMRt). Fast growers were significantly less likely to survive the following winter compared to slow growers. Juveniles with high or low RMRt were less likely to survive winter than juveniles with intermediate RMRt. In contrast, DEE was unrelated to survival. In addition, botfly parasitism simultaneously decreased growth rate and survival, suggesting that the energetic budget of juveniles was restricted by the simultaneous costs of growth and parasitism. Although the biology of the species (seed-storing hibernator) and the context of our study (constraining environmental conditions) were ideally combined to reveal a direct relationship between current use of energy and future availability, it remains unclear whether the energetic cost of growth was directly responsible for reduced survival.

KW - Allocation

KW - BMR

KW - Botfly

KW - FMR

KW - Hoarding

UR - http://www.scopus.com/inward/record.url?scp=84872138592&partnerID=8YFLogxK

U2 - 10.1007/s00442-012-2385-x

DO - 10.1007/s00442-012-2385-x

M3 - Article

VL - 171

SP - 11

EP - 23

JO - Oecologia

JF - Oecologia

SN - 0029-8549

IS - 1

ER -