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Effects of climate change on pup growth and survival in a cooperative mammal, the meerkat

Citation

Van de Ven, Tanja; Fuller, Andrea; Clutton-Brock, Tim (2019), Effects of climate change on pup growth and survival in a cooperative mammal, the meerkat, Dryad, Dataset, https://doi.org/10.5061/dryad.5dv41ns2m

Abstract

1.    Breeding systems in which group members help to raise the offspring of co-members are associated with arid, unpredictable environments. Cooperative rearing may mitigate the effects of adverse environmental conditions on pup growth and survival. However, few studies have explored the relationship between environmental variation and breeding success, and the role of helpers. 
2.    Here we show that increases in daily maximum air temperatures (Tmax) in the southern Kalahari over the last twenty years have been associated with reductions in the growth and survival of meerkat (Suricata suricatta) pups. 
3.    On days when Tmax was high, meerkat pups gained less body mass than on cooler days. Reductions in the diurnal body mass gain (ΔMb) of pups on hotter days were not a consequence of reductions in the frequency with which pups were fed by adults as feeding rate increased with Tmax, suggesting that the reductions in ΔMb by pups on hot days reflected a decrease in water content of the food items or an increased water and energy cost of thermoregulation. 
4.    Reductions in pup ΔMb on hot days were smaller in larger groups, in which helper-to-pup ratios were relatively high.
5.    As further increases in air temperature are predicted with climate change, further reductions in meerkat pup growth and survival seem inevitable.