The role of temperature and humidity in python nest site selection

Z. R. Stahlschmidt, J. Brashears, Dale Denardo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Parental care is a convergent trait shown by a broad range of taxa. Often, successful parents must balance multiple developmental variables (e.g. embryonic water balance and thermoregulation). Pythons have recently emerged as valuable parental care models because females show simple egg-brooding behaviours that significantly influence variables of widespread importance (i.e. embryonic predation, hydration, temperature and respiration). Nest site selection is an important parental behaviour that has been shown to enhance several developmental variables in numerous taxa. In pythons, where brooding can substantially mitigate environmental conditions to enhance the developmental environment, it is unclear to what extent females utilize environmental cues in selecting their nest site. Thus, we determined whether nest humidity and temperature influence python nest site selection because these variables influence python egg-brooding behaviour and are strongly associated with offspring fitness. We created a radial maze with three nest site options: OTH: optimal temperature (31.5°C) and humidity (23g/m3 H2O), as determined by previous studies; OT: optimal temperature, suboptimal humidity (13g/m3 H2O); OH: suboptimal temperature (25°C) and optimal humidity. We monitored the locations of female Children's pythons, Antaresia childreni, during gravidity, at oviposition and when nonreproductive. Females significantly preferred OTH over OT and OH during both reproductive stages; yet, female choice was not significantly different from random when females were nonreproductive. These results, when considered with previous results, demonstrate that female pythons sense environmental temperature and humidity and use this information at multiple time points (i.e. during gravidity, at oviposition and during egg brooding) to enhance the developmental environment of their offspring.

Original languageEnglish (US)
Pages (from-to)1077-1081
Number of pages5
JournalAnimal Behaviour
Volume81
Issue number5
DOIs
StatePublished - May 2011

Fingerprint

Python
nest site
site selection
nesting sites
humidity
temperature
parental care
egg
oviposition
parental behavior
environmental cue
thermoregulation
hydration
water balance
breathing
water budget
ambient temperature
nest
respiration
fitness

Keywords

  • Adaptive significance
  • Antaresia childreni
  • Children's python
  • Oviposition site selection
  • Parental care
  • Snake
  • Thermoregulation
  • Water balance

ASJC Scopus subject areas

  • Animal Science and Zoology
  • Ecology, Evolution, Behavior and Systematics

Cite this

The role of temperature and humidity in python nest site selection. / Stahlschmidt, Z. R.; Brashears, J.; Denardo, Dale.

In: Animal Behaviour, Vol. 81, No. 5, 05.2011, p. 1077-1081.

Research output: Contribution to journalArticle

Stahlschmidt, Z. R. ; Brashears, J. ; Denardo, Dale. / The role of temperature and humidity in python nest site selection. In: Animal Behaviour. 2011 ; Vol. 81, No. 5. pp. 1077-1081.
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