The relationship between density and distance of dispersing insects

Abstract

Abstract. 1. The data for dispersal of Drosophila pseudoobscura of Dobzhansky & Wright (1943) were re‐examined and an improved description found for them. 2. The equation that best described the dispersal of D.pseudoobscura was found not to be applicable to the dispersal of five other insect species. 3. Eight equations describing the density‐distance relation were fitted to the dispersal data of eight insect species. No equation fitted all the data adequately. 4. A general expression was deduced from comparison of the eight equations, and found to fit all species better than any of the special cases.