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Litter quality and inflammatory response are dependent on mating strategy in a reptile
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Litter quality and inflammatory response are dependent on mating strategy in a reptile
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Litter quality and inflammatory response are dependent on mating strategy in a reptile
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Journal Article
Litter quality and inflammatory response are dependent on mating strategy in a reptile
2012
Overview
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 context-dependent 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 marker-based 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 systems.
