Abstract
Uric acid was measured in fat body of several age groups of the German cockroach, Blattella germanica (L.). Fat body was dissected from insects and dried to constant weight; uric acid was measured on a percentage dry weight basis using an enzyme-specific assay with uricase. Aposymbiotic last stage nymphs contained about twice as much uric acid as normal nymphs (means of 48 and 23%, respectively). Uric acid increased with high significance in normal nymphs during the last stage. There was a marginally significant increase (mean of 54%) with age in aposymbiotic adult females, while normal adult females showed a highly significant increase and much greater variation (between 18 and 87%) than the other groups tested. Both adult normal and adult aposymbiotic males showed increases in uric acid with age in asymptotic fashion, approaching mean maximum values of about 72 and 81%, respectively.
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