Discriminating uniparental and biparental breeding strategies by monitoring nest temperature

Moreau, J., Perroud, L., Bollache, L., Yannic, G., Teixeira, M., Reneerkens, J., Schmidt, N. M. & Gilg, O. Jan-2018 In : IBIS – International Journal of Ornithology. 160, 1, p. 13-22 10 p.

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  • Discriminating uniparental and biparental breeding strategies by monitoring nest temperature

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  • Jerome Moreau
  • Lucie Perroud
  • Loïc Bollache
  • Glenn Yannic
  • Maria Teixeira
  • Jeroen Reneerkens
  • Niels Martin Schmidt
  • Olivier Gilg
Birds exhibit a wide diversity of breeding strategies. During incubation or chick-rearing, parental care can be either uniparental, by either the male or the female, or biparental. Understanding the selective pressures that drive these different strategies represents an exciting challenge for ecologists. In this context, assigning the type of parental care at the nest (e.g. biparental or uniparental incubation strategy) is often a prerequisite to answering questions in evolutionary ecology. The aim of this study was to produce a standardized method unequivocally to assign an incubation strategy to any Sanderling
Calidris alba nest found in the field by monitoring nest temperature profiles. Using drops of >3 °C in nest temperature (recorded with thermistors) to distinguish incubation and recess periods, we showed that the number of recesses and the total duration of these recesses from 09:00 to 17:00 h UTC allowed us reliably (99.1% after 24 h and 100% when monitoring the nest for at least 4 days) to assign the incubation strategy at the nest for 21 breeding adults (14 nests). Monitoring nest temperature for at least 24 h is an effective method to assign an incubation strategy without having to re-visit nests, thereby saving time in the field and minimizing both disturbance and related increase in predation risk of clutches. Given the advantages of our method, we suggest that it should be used more widely in studies that aim to document incubation strategies and patterns in regions where ambient temperatures are at least 3 °C below the median nest temperature.
Original languageEnglish
Pages (from-to)13-22
Number of pages10
JournalIBIS – International Journal of Ornithology
Issue number1
StatePublished - Jan-2018


  • incubation, incubation behaviour, shorebirds, Sanderling, thermologger, incubation system

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