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School size distribution of tuna fish caught in the vicinity of a FAD aggregated over 7 yr (1976–1982). The dotted line corresponds to a fit of the type a s−be−(s/sc)c, with a = 11,13.3, b = 0.698, c = 1, sc = 3.72. The solid line has been obtained with the mean-field model supplemented with an attracting site (P = 0.1, n = 80,000, n = 100,000, η = 0.05).
