Fig. 1.

Mass-specific and summed activities of pancreatic enzymes and ratios of amylase to trypsin (A/T) and amylase to chymotrypsin (A/C) activity in nestling house sparrow in trials 1 and 2. The filled circles indicate birds raised on the HP diet, and the open circles depict birds raised on the HS diet. Mean ± S.E.M. are shown. See Tables 2 and 3 for significance of diet and age effect