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Effects of offspring immune challenge and offspring sex on number of learning trials required to solve a foraging task (F2,82=3.55, p=0.033). Offspring immune challenges were administered on days 5 and 28 post-hatch and learning ability was assessed at approximately 1 year post-hatch. Numbers within bars represent sample sizes. KLH=keyhole limpet hemocyanin, LPS=lipopolysaccharide, Control=phosphate buffered saline injection.
