By George Hangay (auth.)
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Extra info for Encyclopedia of Entomology
Both larvae grew best on cholesterol, followed by cholestanol, sitosterol and 7-dehydrocholesterol. Cholesterol sparing abilities were also investigated and found to be somewhat limited in both species, but results did suggest that cholestanol worked in this capacity better than did sitosterol or 7-dehydrocholesterol. 2 INSECT STEROL METABOLISM Our understanding of insect sterol use has been greatly enhanced by studies that measure and compare the sterol content of insect tissues to the foods that insects eat.
INSECT STEROL NUTRITION AND PHYSIOLOGY 37 (the suborder containing the gryllids) (Rowell and Flook, 1998), which suggests that broad sterol metabolic dealkylation abilities may have been lost. It also perhaps implies that there may be metabolic costs associated with maintaining a broad enzymatic capability. Unfortunately there is little consensus on the phylogenetic relationship within the Polyneoptera (Exopterygota excluding the Apterygota and Paleoptera), and the lack of information on sterol use or metabolism in this group, outside of the acridids, makes it difficult to infer much about the evolution of sterol metabolic capability.
T. BEHMER AND W. D. , 1980. INSECT STEROL NUTRITION AND PHYSIOLOGY Arctiidae (VII) Chilo simplex (63) Noctuidae (VII) Helicoverpa zea (64) 17 18 S. T. BEHMER AND W. D. g. anobiids and ptinids, within the superfamily Bostrichoidea, which grow quite well on the fungal sterol ergosterol. Perhaps sterol use in the Bostrichoidea is related to feeding ecology. For the zoophagous D. maculatus (Dermestidae) cholesterol is the only sterol that supports growth and development, while in the phytophagous Kharpa beetle, Trogoderma granarium, which is also a dermestid, sitosterol and stigmasterol, in addition to cholesterol, support growth and development.