Substances With Juvenile Hormone Activity in Crustacea and Other Invertebrates

Abstract

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The Chemical Control of Feeding in the Portuguese Man-of-War, Physalia Physalis L. And Its Bearing on the Evolution of the Cnidaria

“…These experiments support the opinion offered earlier (Schneiderman and Gilbert, 1958) that the evolution of chemical control mechanisms has proceeded by particular groups of animals adapting available and often ubiquitous molecules to special tasks. Under this view the evolution of hormonal coordination involves primarily the evolution of receptor systems sensitive to specific molecules rather than any evolution of hormones as such.…”

Discovery of methylfarnesoate as the annelid brain hormone reveals an ancient role of sesquiterpenoids in reproduction

“…(Laufer and Biggers, 2001), and annelid extracts displayed biological activity in assays for insect juvenile hormones (Schneiderman and Gilbert, 1958). The latter result would suggest that insect juvenile hormones might also be active in the annelid system, but this issue has not yet been addressed experimentally.…”

Identification of a Juvenile Hormone-Like Compound in a Crustacean

“…With the discovery that ecdysteroids regulate molting in both insects (2) and crustaceans (3) investigators have speculated that Crustacea might also contain a compound related to JH. This possibility is supported by the detection of JH biological activity in extracts of crustacean eyestalks (4) and data on the effects of synthetic JH analogs on crustacean metamorphosis and reproduction (5)(6)(7)(8). These results have proven difficult to interpret, however.…”

“…Theories that have been proposed to explain the origin of ethological isolating mechanisms may be characterized as either adaptive or incidental. According to the former group, ethological isolation arises as a response to selection against mating with an individual whose genotype is adapted to a different niche (3,4). Thus, the production of either infertile offspring or hybrids 9 JANUARY I987 that are not optimally suited to either niche brings about an increased tendency to mate assortatively, that is, with individuals of similar genotype.…”