| Summary: | Peptide hormones play a special role in the neuroendocrine systems of insects and affect a
number of physiological processes related to their development, reproduction and behavior. The lipid
content in the fat body of insects is closely correlated with the work of the endocrine glands. The lipid
profile of the fat body of the Zophobas atratus beetle reveals a predominant proportion of
triacylglycerols when compared to free fatty acids and other lipid compounds, such as fatty acid
esters, fatty alcohols and sterols. Although it may depend on the stage of the insects’ development,
the disparate impacts of the adipokinetic hormone (AKH) on the lipid content in the fat bodies of the
feeding larvae and the non-feeding pupae of Z. atratus, may signify the different roles this hormone
plays in the indirect control of the insects’ metabolism.
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