THE Patterns of distributions of adults of the red locust (nomadacris septemfasciata serville) in an outbreak area
1963
SYMMONS, P.M.
The coefficient of dispersion, an index of the relative proportion of the population at high and low densities, was calculated for a number of outbreak area populations of the red locust. The comparison of these indices showed that the proportion of the population at high densities was greatest near the middle of the adult locust's life. The data suggested that the proportion of locusts at high densities was greater with higher mean locust densities and after the formation of swarms. On the other hand this value was probably lower in a habitat made up of patches of tall and short grass or of burnt-off ground and unburnt stands, than in uniform grassland, and was probably also lower after insecticide attack than before.
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