Establishing a science-policy-society interface for biodiversity conservation and human well-being in the Amazon: The case of Madre de Dios, Peru

Publication Type

Journal Article

Journal Name

Archives of Insect Biochemistry and Physiology

Publication Date

1-1-1996

Abstract

In the penultimate and last instar larvae of Schistocerca gregaria, 20-hydroxyecdysone (20E) makes up 74-84% of detected ecdysteroids in the females, and 63-74% in the males. Remaining ecdysteroids include ecdysone, a compound with HPLC and TLC retention times of makisterone A, and highly polar metabolites. Except for the last instar females, the contents of ecdysone and the unknown compound are higher in the solitary phase, while that of polar metabolites is higher in the gregarious phase. The phases also differ in that the molt-inducing ecdysteroid peaks last longer in the gregarious than in the solitary larvae. Peak concentrations reach 3.0-4.0 μg 20E equiv./ml in penultimate female instar, 2.5-3.0 μg/ml in penultimate male instar, and 1.5-2.0 μg/ml in the last larval instar of both sexes. © 1996 Wiley-Liss, Inc.

Keywords

Dimorphism, Ecdysone, Insect hormones, Locust, Makisterone A, Molting, Polymorphism

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