FACTORS AFFECTING BEHAVIORAL PHASE-TRANSITION IN THE DESERT LOCUST, SCHISTOCERCA-GREGARIA (FORSKAL) (ORTHOPTERA, ACRIDIDAE)

Citation
Y. Heifetz et al., FACTORS AFFECTING BEHAVIORAL PHASE-TRANSITION IN THE DESERT LOCUST, SCHISTOCERCA-GREGARIA (FORSKAL) (ORTHOPTERA, ACRIDIDAE), Journal of chemical ecology, 22(9), 1996, pp. 1717-1734
Citations number
28
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Ecology,Biology
Journal title
ISSN journal
0098-0331
Volume
22
Issue
9
Year of publication
1996
Pages
1717 - 1734
Database
ISI
SICI code
0098-0331(1996)22:9<1717:FABPIT>2.0.ZU;2-A
Abstract
The behavior of the desert locust, Schistocerca gregaria (Forskal) (Or thoptera: Acrididae), is adjusted rapidly to population density and is a phase characteristic. We used discriminant analysis to quantify the extent of phase transition from the solitary to the gregarious phase and accurately classify the phase status on the basis of two decisive behavioral parameters: nymphal activity and social interaction. Fecal extracts, examined by olfactometry, attract solitarious nymphs but do not contribute to behavioral phase transition. Neither do visual stimu li alone. Short-range olfaction of airborne volatiles slightly affects behavioral phase transition. Antennectomy abolishes density response. Cuticular lipid extract, containing presumptive contact pheromones, d oes not attract nymphs, but does significantly affect behavioral phase transition.