Authors: Murielle Richard Manuel Massot Jean Clobert Sandrine Meylan
Publish Date: 2012/02/23
Volume: 170, Issue: 1, Pages: 39-46
Abstract
Maintenance of health and the production of offspring are competing processes that can result in tradeoffs As vertebrates invest substantial resources in their immune system it is crucial to understand the interactions between immunity and reproductive strategies In the lizard Zootoca vivipara females have condition and contextdependent mating strategies We predicted that if the risk of infection is higher for polyandrous females then polyandrous females should invest more in immune system while monandrous females should invest more in reproduction In order to test our prediction we captured 62 gravid females of known age in a natural population we kept them until parturition to access to their offspring Then using microsatellite markerbased paternity analyses within litters we determine the mating strategy of females monandrous or polyandrous Females were also challenged with PHA to estimate their inflammatory response Our results show that polyandrous females have a higher PHA response than the monandrous females and that monandrous females produce more males and more juveniles of better body condition than polyandrous females The relationship between mating behaviour and immune function may have consequences for females and may shape the evolution of mating systemsThe authors are grateful to all students and colleagues who helped in collecting data over the years the Office National des Forêts and the Parc National des Cévennes for field work facilities This work was supported by the CNRS the Ministère de la Recherche et des Nouvelles Technologies Programmes ORE and ANR and the Institut d’Ecologie IFR 101 The study was carried out in accordance with institutional guidelines under licence from the French Ministry of the Environment and under permit from the SeineetMarne Veterinary department permits number 7702
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