Estimating Migration and the Effects of Disturbance in Mark-Recapture Studies on the Snail Cepaea nemoralis L

(1) A method is described for estimating migration rates from recapture data by recording movements across internal boundaries of a study site. (2) Application of the method to a grassland population of the snail Cepaea nemoralis indicated an annual adult emigration rate of 26-56% from a 400 m2 plot...

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Bibliographic Details
Published in:The Journal of animal ecology 1977-02, Vol.46 (1), p.173-179
Main Authors: Cameron, R. A. D., Williamson, P.
Format: Article
Language:English
Subjects:
Emigration
Estimation methods
Human migration
Population density
Population dynamics
Population ecology
Population estimates
Population migration
Random errors
Snails
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Summary:(1) A method is described for estimating migration rates from recapture data by recording movements across internal boundaries of a study site. (2) Application of the method to a grassland population of the snail Cepaea nemoralis indicated an annual adult emigration rate of 26-56% from a 400 m2 plot, and a net loss of c. 10% per year due to collecting disturbance. (3) Correcting for migration had a considerable effect on estimates of population gains and losses, as determined by Jolly's method. (4) Undisturbed migration rates were highest in May and June, but unaffected by population density.
ISSN:0021-8790
1365-2656
DOI:10.2307/3954