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(Left) Alkaloid (usaramine) content of eggs from 15 natural Utetheisa egg clusters. Two numbers are given for each cluster: mean + SE, derived from analyses of five individual eggs (solid column), and averages, calculated from analysis of a five-egg sample (striped column). (Right) Alkaloid (monocrotaline) concentration in Utetheisa egg, egg interior, and egg shell (n = five for each sample).
