Black-legged Kittiwake (Rissa tridactyla) Science Article 10
abstract
1.The immune system plays an important role in fitness, and interindividual variationin immunocompetence is due to several factors including food supply.2. Seasonal variation in food resources may therefore explain why immunocompetencein bird nestlings usually declines throughout the breeding season
J. GASPARINI et al, Functional Ecology 2006 20, 457-463