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The development of individual differences in cooperative behaviour: Maternal glucocorticoid hormones alter helping behaviour of offspring in wild meerkats

Research output: Contribution to journalArticle

Original languageEnglish
Article number20180117
Pages (from-to)20180117
Number of pages16
JournalPhilosophical Transactions B: Biological Sciences
Volume374
Issue number1770
Early online date25 Feb 2019
DOIs
DateAccepted/In press - 8 Nov 2018
DateE-pub ahead of print - 25 Feb 2019
DatePublished (current) - 15 Apr 2019

Abstract

The phenotype of parents can have long-lasting effects on the development of offspring aswell as on their behaviour, physiology and morphology as adults. In some cases, these changes may increase offspring fitness but, in others, they can elevate parental fitness at a cost to the fitness of their offspring. We show that in Kalahari meerkats (Suricata suricatta), the circulating glucocorticoid (GC) hormones of pregnant females affect the growth and cooperative behaviour of their offspring.
We performed a 3-year experiment in wild meerkats to test the hypothesis that GC-mediated maternal effects reduce the potential for offspring to reproduce directly and therefore cause them to exhibit more cooperative behaviour. Daughters (but not sons) born to mothers treated with cortisol during pregnancy grew more slowly early in life and exhibited significantly more of two types of cooperative behaviour (pup rearing and feeding) once they were adults compared to offspring from control mothers. They also had lower measures of GCs as they aged, which could explain the observed increases in cooperative behaviour. Because early life growth is a crucial determinant of fitness in female meerkats, our results indicate that GC-mediated maternal effects may reduce the fitness of offspring, but may elevate parental fitness as a consequence of increasing the cooperative behaviour of their daughters.

    Research areas

  • Cooperation, Early life adversity, Glucocorticoids, Growth, Maternal stress

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    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via the Royal Society at https://royalsocietypublishing.org/doi/10.1098/rstb.2018.0117 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 1 MB, PDF document

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