AbstractsBiology & Animal Science

The effect of weather on insect populations

by John B. Lewis




Institution: McGill University
Department: Department of Biology.
Degree: MS.
Year: 1950
Keywords: Zoology.
Record ID: 1520299
Full text PDF: http://digitool.library.mcgill.ca/thesisfile122815.pdf


Abstract

The factors in nature which influence population changes are so numerous and so complex that it seems that the only hope of understanding their interrelations lies in a thorough knowledge of how each factor operates separately upon the population. Having assessed the value of each agent by itself we may look to the biomathematician to describe their interdependence. Population changes depend upon nutrition, weather, competition between species, fecundity and the incidence of disease, parasites and predators.