01150naa a2200133 a 450000100080000000500110000800800410001910000180006024500750007826000090015352007830016265000270094577300440097212797062025-02-24       1959    bl uuuu     u00u1 u    #d1 aMORRIS, R. F.  aSingles factor analysis in population dynamics.h[electronic resource]  c1959  aInthe study of natural populations it is desirablebut not always feasible to measure the effects ofall mortality factors. This requires frequent pop-ulation sampling, supported by data on naturalenemies, climate, and other factors, and leads tothe compilation of detailed life tables for succes-sive generations. These tables must be compiledsimultaneously for a number of different environ-ments if it is desired to learn why populationdensity varies in place as well as in time.Itisimportant to know, for example, why a forest in-sect periodically develops high populations in cer-tain well-defined stand types but not in all typeswhere it occurs. This multi-factor approach there-fore demands much time and effort and, for speciesthat are difficult to sample, is more suitabl  aDinâmica Populacional  tEcologygv. 40, n. 4, p. 580-588, 1959.