Thermal dependence of incubation duration under a cycling temperature regime in the lizard, Podarcis hispanica atrata

Aurora M. Castilla, John G. Swallow

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We report the effects of incubation temperature on the duration of incubation and hatchling size in the insular lizard Podarcis hispanics atrata. Freshly-laid eggs were placed in artificial nests that were exposed to a natural cyclical variation of microclimate. We monitored substrate temperatures and egg size throughout the incubation period, and measured hatchling size at birth. The mean incubation period was 54 days at average incubation (substrate) temperatures that ranged from 23.5 to 26.5 C. We found a negative relation between the duration of incubation and mean incubation temperature. Overall survival of eggs to hatching was high (83%), even though eggs were frequently exposed for short periods (1-5 h) to high substrate temperatures (>35 C). We found no effect of duration of incubation or incubation temperature on the size of hatchlings.

Original languageEnglish
Pages (from-to)247-253
Number of pages7
JournalJournal of Herpetology
Volume30
Issue number2
Publication statusPublished - 1996
Externally publishedYes

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lizard
lizards
incubation
heat
duration
temperature
egg
substrate
microclimate
artificial nest
Podarcis
hatching
egg size
nests

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Thermal dependence of incubation duration under a cycling temperature regime in the lizard, Podarcis hispanica atrata. / Castilla, Aurora M.; Swallow, John G.

In: Journal of Herpetology, Vol. 30, No. 2, 1996, p. 247-253.

Research output: Contribution to journalArticle

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