PARENTAL EFFECTS ON THE BEHAVIOR AND COLORATION OF NYMPHS OF THE DESERT LOCUST SCHISTOCERCA-GREGARIA

The behavioural phase status of hatchling Schistocerca gregaria Forsk ($) over circle al has been quantified using logistic regression, foll owing treatments in which maternal and paternal phase, density during mating and oviposition, and nymphal rearing density were varied. All t reatments (having a crowd-reared mother, a crowd-reared father, parent s which were crowded only for the period of mating and oviposition, or being reared from birth in a crowd) had a marked gregarizing effect o n the behaviour and colour of hatchlings. Such effects have important implications for the generation of locust swarms.