Abstract
The role of lipid during the metamorphosis of the silkworm, Bombyx mori was studied. Male pupae retained a higher lipid content in the whole body and the fat body through the pupal period. In females, lipid content of the whole body decreased remarkably at the late pupal period and the fat body lipid also decreased suggesting that lipid is transported into the developing ovary via the blood. Ovariectomy immediately after pupation resulted in remarkable lipid deposition in the whole body, fat body and blood. These results indicate that the sexual dimorphism observed in the whole body and fat body lipid content of B. mori pupae is closely connected with the ovarian development.
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