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Fig. 4. Intake points of L. migratoria and S. gregaria fed one of
a range of diets differing in protein:carbohydrate (P:C) ratio over the first
3 days (A) and 5 days (B) of the 5th larval stadium and across the entire
stadium (C). The angle of each dotted line (`nutritional rail') depicts the
P:C ratio of the food it represents. Since intake points were not free to vary
other than along the relevant nutritional rail, S.E.M. are coincident with the
rails (solid lines). See text for explanation of statistical tests.