Seasonal trade-offs in cell-mediated immunosenescence in ruffs (Philomachus pugnax).

Abstract excerpt

The immune system is an energetically expensive self-maintenance complex that, given the risks of parasitism, cannot be carelessly compromised. Life-history theory posits that trade-offs between fitness components, such as self-maintenance and reproduction, vary between genders and age classes depending on their expected residual lifetime reproductive success, and seasonally as energetic requirements change....

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