The thermal consequences of primate birth hour and its evolutionary implications

Tools

McFarland, R. ORCID: 0000-0001-8245-9269, Henzi, S.P., Fuller, A., Hetem, R.S., Young, C. ORCID: 0000-0001-8919-2093 and Barrett, L., 2022. The thermal consequences of primate birth hour and its evolutionary implications. Biology Letters, 18 (1). ISSN 1744-9561

Preview

Text
1511839_McFarland.pdf - Published version
Download (641kB) | Preview

Official URL: https://doi.org/10.1098/rsbl.2021.0574

Abstract

Most primates, including humans, give birth during the inactive phase of the daily cycle. Practical constraints therefore limit our knowledge of the precise timing of nocturnal birth in wild diurnal primates and so limit our understanding of selective pressures and consequences. We measured maternal core body temperature (T b) across 24 births in a population of wild vervet monkeys using biologgers. We identified distinct perturbations in T b during the birth period, including declining T b during labour and the rapid recovery of T b post-parturition. Vervet monkeys typically gave birth during their inactive phase in synchrony with the nadir of the maternal nychthemeral T b rhythm but also showed remarkable inter-individual variability in their absolute T b during birth. Our findings support the view that selection may have favoured a nocturnal timing of primate birth to coincide with lower night-time T b and environmental temperatures, which improve thermal efficiency during birth.

Item Type:

Journal article

Publication Title:

Biology Letters

Creators:

McFarland, R., Henzi, S.P., Fuller, A., Hetem, R.S., Young, C. and Barrett, L.

Publisher:

Royal Society, The

Date:

26 January 2022

Volume:

Number: