Experimental support for the cost-benefit model of lizard thermoregulation

G. Herczeg, Abigél Gonda, Jarmo Saarikivi, Juha Merilä

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

According to Huey and Slatkin's [Q Rev Biol 51:363-384, 1976] cost-benefit model of behavioural thermoregulation, lizards should adjust their thermoregulatory strategy between active thermoregulation and thermoconformity (no thermoregulation) according to the costs (time and energy spent thermoregulating, exposure to predators), benefits (optimised physiological performance) and thermal quality of environment associated with a given situation. However, Gilchrist's [Am Nat 146:252-270, 1995] model of thermal specialisation suggests that apparently costly mechanisms of behavioural thermoregulation can greatly increase fitness if the optimal body temperature is achieved. Field studies of ectotherm thermoregulatory strategies under extreme cold conditions and experiments testing the effects of cool environments on thermoregulatory behaviour are surprisingly scarce. We conducted laboratory experiments to test if common lizards Zootoca vivipara (an active thermoregulator in the field) are able to switch between active thermoregulation and thermoconformity in response to different thermal environments. We found that lizards in treatments with an opportunity to reach their preferred body temperature thermoregulated accurately, maintained their level of daily activity and improved their body condition considerably. In contrast, lizards in the treatment where the preferred body temperature could not be reached became thermoconformers, decreased their daily activity (except for gravid females) and did not increase their body condition. Our results show that lizards can indeed change their thermoregulatory strategy but stress that maintaining the preferred body temperature and, thus, optimising the physiological performance have high priority in lizard behaviour.

Original languageEnglish
Pages (from-to)405-414
Number of pages10
JournalBehavioral Ecology and Sociobiology
Volume60
Issue number3
DOIs
Publication statusPublished - Jul 2006

Fingerprint

thermoregulation
Lizards
Body Temperature Regulation
lizard
Cost-Benefit Analysis
lizards
body temperature
Body Temperature
Hot Temperature
body condition
heat
Extreme Cold
gravid females
cost-benefit
fitness
testing
predator
predators
Costs and Cost Analysis
energy

Keywords

  • Body temperature
  • Thermal ecology
  • Thermoregulatory behaviour
  • Zootoca vivipara

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology
  • Behavioral Neuroscience

Cite this

Experimental support for the cost-benefit model of lizard thermoregulation. / Herczeg, G.; Gonda, Abigél; Saarikivi, Jarmo; Merilä, Juha.

In: Behavioral Ecology and Sociobiology, Vol. 60, No. 3, 07.2006, p. 405-414.

Research output: Contribution to journalArticle

Herczeg, G. ; Gonda, Abigél ; Saarikivi, Jarmo ; Merilä, Juha. / Experimental support for the cost-benefit model of lizard thermoregulation. In: Behavioral Ecology and Sociobiology. 2006 ; Vol. 60, No. 3. pp. 405-414.
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