POPULATION CHANGE IN AN OUTBREAK OF THE DOUGLAS-FIR TUSSOCK MOTH, ORGYIA PSEUDOTSUGATA (LEPIDOPTERA: LYMANTRIIDAE), IN CENTRAL ARIZONA
- 1 November 1974
- journal article
- Published by Cambridge University Press (CUP) in The Canadian Entomologist
- Vol. 106 (11) , 1171-1174
- https://doi.org/10.4039/ent1061171-11
Abstract
Changes in population density were evaluated over an outbreak cycle of the Douglas-fir tussock moth. Growth rate of populations was independent of larval density in the first year, but thereafter became a reciprocal function of density, terminated by complete population collapse at the end of the third year. Through correlation analyses, it was found that density of small larvae accounted for a large proportion of the change in population density between years. This suggests that the local infestations developed largely from resident populations of at least 2 years and not from spread of early instar larvae during the outbreak.Keywords
This publication has 6 references indexed in Scilit:
- Some problems of testing for density-dependence in animal populationsOecologia, 1973
- The Regression of Log N(n+1) On Log N(n) as a Test of Density Dependence: An Exercise with Computer‐Constructed Density‐Independent PopulationsEcology, 1970
- DEVELOPMENT OF SAMPLING METHODS FOR THE DOUGLAS-FIR TUSSOCK MOTH, HEMEROCAMPA PSEUDOTSUGATA (LEPIDOPTERA: LYMANTRIIDAE)The Canadian Entomologist, 1970
- Correlation, Regression, and Density DependenceEcology, 1970
- A nucleopolyhedrosis virus in populations of the Douglas-fir tussock moth, Hemerocampa pseudotsugata, in CaliforniaJournal of Invertebrate Pathology, 1969
- Density Dependence in Population FluctuationsThe Canadian Entomologist, 1964