Age-specific variation of body mass and lipid reserves in Periplaneta americana (Blattodea: Blattidae)**

AbstractAn experiment was conducted on age-specific variation of body mass (BM) and lipid reserves (LR) in Periplaneta americana (L.) (Blattodea: Blattidae). The BM and LR of adult females and males of P. americana fluctuated with age and the females were heavier and loaded with more lipids than the males. The BM and LR of both female and male P. americana showed positive correlation.