A measurement of dispersal in the grasshopper Podisma pedestris (Orthoptera: Acrididae)

N.H. Barton, G. Hewitt, Heredity 48 (1982) 237–249.

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Abstract
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 214 m2 day- 1, which corresponds to a standard deviation of 207 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 186- 270 m gen- 1/2. However, the main errors come from extrapolating from this experiment to the cline as a whole.
Publishing Year
Date Published
1982-04-01
Journal Title
Heredity
Volume
48
Issue
2
Page
237 - 249
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Barton NH, Hewitt G. A measurement of dispersal in the grasshopper Podisma pedestris (Orthoptera: Acrididae). Heredity. 1982;48(2):237-249. doi:10.1038/hdy.1982.29
Barton, N. H., & Hewitt, G. (1982). A measurement of dispersal in the grasshopper Podisma pedestris (Orthoptera: Acrididae). Heredity, 48(2), 237–249. https://doi.org/10.1038/hdy.1982.29
Barton, Nicholas H, and Godfrey Hewitt. “A Measurement of Dispersal in the Grasshopper Podisma Pedestris (Orthoptera: Acrididae).” Heredity 48, no. 2 (1982): 237–49. https://doi.org/10.1038/hdy.1982.29.
N. H. Barton and G. Hewitt, “A measurement of dispersal in the grasshopper Podisma pedestris (Orthoptera: Acrididae),” Heredity, vol. 48, no. 2, pp. 237–249, 1982.
Barton NH, Hewitt G. 1982. A measurement of dispersal in the grasshopper Podisma pedestris (Orthoptera: Acrididae). Heredity. 48(2), 237–249.
Barton, Nicholas H., and Godfrey Hewitt. “A Measurement of Dispersal in the Grasshopper Podisma Pedestris (Orthoptera: Acrididae).” Heredity, vol. 48, no. 2, Nature Publishing Group, 1982, pp. 237–49, doi:10.1038/hdy.1982.29.

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