| Literature DB >> 8440354 |
J Lokensgard1, R L Smith, T Eisner, J Meinwald.
Abstract
The aquatic bug Abedus herberti (Hemiptera: Belostomatidae) secretes a mixture containing four pregnanes (desoxycorticosterone (I), pregnenolone (II), progesterone (III), and 3 alpha-hydroxy-pregn-5-en-20-one (IV)) from its cephalic glands. Pregnanes had previously been characterized from the defensive glands of aquatic beetles (Dytiscidae) and shown to be deterrent to fish. It may be specifically under predation pressure from fish that A. herberti and Dytiscidae evolved their comparable defenses.Entities:
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Year: 1993 PMID： 8440354 DOI： 10.1007/bf01989425
Source DB: PubMed Journal: Experientia ISSN： 0014-4754