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Plasma IGF-1 hormone in adult (A) and juvenile (B) S. undulatus. In both sexes, average IGF-1 concentrations were about 4× higher in juveniles than adults. Within either age group, IGF-1 did not differ between sexes and was not significantly affected by T. Columns represent the group mean ± 1 SE. Sample sizes: n = 9 in all groups except JF-CON, in which n = 10. See Results sections “Adults” and “Juveniles” under Hepatic IGF-1 mRNA and plasma IGF-1 for statistical details.
