The dispersal rate of the grasshopper Podisma pedestris has been measured, with the aim of interpreting the width of a chromosomal cline. 171 adults were marked individually, and released within the cline. 169 movements were seen over three subsequent scorings; the distribution of distances, after correction for the loss of long distance dispersants, was close to a normal curve, but there was an initial shift of ten metres, perhaps towards a better habitat. The linear variance increased at about 21·4 m2 day−1, which corresponds to a standard deviation of 20·7 m gen−1/2 over a 20 day life span. Statistical uncertainty in this estimate can be expressed using a distribution-free maximum likelihood method, which gives support limits of 18·6−27·0 m gen−1/2. However, the main errors come from extrapolating from this experiment to the cline as a whole.
Barton, N H. 1979. A Narrow Hybrid Zone in the Alpine Grasshopper Podisma pedestris. Ph.D. Thesis, University of East Anglia, Norwich.
Barton, N H. 1980. The fitness of hybrids between two chromosomal races of the grasshopper Podisma pedestris. Heredity, 45, 47–59.
Barton, N H, and Hewitt, G M. 1981a. A chromosomal cline in the grasshopper Podisma pedestris. Evolution, 35, 1008–1018.
Barton, N H, and Hewitt, G M. 1981b. The genetic basis of hybrid inviability between two chromosomal races of the grasshopper Podisma pedestris. Heredity, 47, 367–383.
Dobzhansky, Th, and Wright, S. 1947. Genetics of natural populations: XV. Rate of diffusion of a mutant gene through a population of Drosophila pseudoobscura. Genetics, 32, 303–324.
Edwards, A W F. 1972. Likelihood. Cambridge Univ. Press.
Endler, J A. 1977. Geographic Variation, Speciation and Clines. Princeton Univ. Press.
Haldane, J B S. 1948. The theory of a cline. J Genet, 48, 277–284.
Lande, R. 1979. Effective deme sizes during long-term evolution estimated from rates of chromosomal rearrangement. Evolution, 33, 234–251.
Nagylaki, T. 1975. Conditions for the existence of clines. Genetics, 80, 585–615.
Taylor, C E, and Powell, J R. 1977. Microgeographic differentiation of chromosomal and enzyme polymorphisms in Drosophila persimilis. Genetics, 85, 681–695.
Taylor, R A J. 1978. The relationship between density and distance of dispersing insects. Ecol Entom, 3, 63–70.
Wright, S. 1951. The genetical structure of populations. Ann Eugenics, 15, 323–354.
Wright, S. 1978. Evolution and the Genetics of Population Vol IV Variability Within and Among Natural Populations. Chapter 2. Univ. of Chicago Press.
Yokoyama, S. 1979. The rate of allelism of lethal genes in a geographically structured population. Genetics, 93, 245–262.
About this article
Cite this article
Barton, N., Hewitt, G. A measurement of dispersal in the grasshopper Podisma pedestris (Orthoptera: acrididae). Heredity 48, 237–249 (1982). https://doi.org/10.1038/hdy.1982.29
Analysis of geographic centrality and genetic diversity in the declining grasshopper species Bryodemella tuberculata (Orthoptera: Oedipodinae)
Biodiversity and Conservation (2021)
Population genetic structure and phylogeographical pattern of rice grasshopper, Oxya hyla intricata, across Southeast Asia