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Migration and Dispersal of Insects by Flight

Cecil George Johnson

出版	Methuen, 1969
主題	Science / Life Sciences / Zoology / General
ISBN	04161187049780416118704
URL	http://books.google.com.hk/books?id=JzIgAQAAMAAJ&hl=&source=gbs_api

註釋

Migration and dispersal; Migratory and non-migratory flight; Classes of migration; The beginning of migration; Individual aspects; Flight maturation, Take-off, and the exodus flight; The air speed and the intrinsic duration and range of flight; The orientation of migrants; Migration in relation to mating, sexual development and oviposition; The control of spontaneous locomotor activity a prerequisite for migratory flight; Casual aspects of migratory flight; Colletive aspects; The numbers of insects flying in relation to wether; The periodicity and synchronization of migration; The Composition of aerial populations and the vertical distribution of insects in the air; Selected examples of short-range and medium-range displacement especially in relation to the life-histories of the insects; Diptera; Coleoptera; Hemiptera; Lepidoptera. The idea randon dispersal, and of the deminution of density away from a source, in relation to migratory flight. General systems of air movement involved in longrange sispolacement. Hemiptera. Lepidoptera. The displacement of swarms of the desert locust schistocerca gregaria. Migration through mountain passes and along sea coats. The invasion of habitats. The ecological significance of migration and of flightlessness.