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Expanded view of Results graph.

Masta, S.E. and W.P. Maddison. 2002. Sexual selection driving diversification in jumping spiders. Proc. Natl. Acad. Sci. U.S.A., Vol. 99, Issue 7, 4442-4447, April 2, 2002.

Copyright © 2002 National Academy of Sciences, U.S.A. All rights reserved.

(Left) Means ± SE latency times to mating for each of three between-range crosses tested in mating trials. G = Galiuro; S = Sierrita; R = Santa Rita. Galiuro × Santa Rita crosses showed significantly longer latencies to mating than did either of the other crosses (2 = 9.35, df = 2, P = 0.0093; Kruskal-Wallis test with Tukey-Kramer test for pair comparisons). Sample sizes are: n = 15 Galiuro × Sierrita (14 Gf, 1 Sf); n = 14 Sierrita × Santa Rita (5 Sf, 9 Rf); n = 15 Galiuro × Santa Rita (10 Rf, 5 Gf); n = 5 pooled within ranges (G = 1, S = 1, R = 3). (Right) Means ± SE number of viable offspring for each of three between-range crosses and three pooled combinations of within-range matings. Two results are significant: (i) Sierrita × Santa Rita crosses produced significantly more offspring than Galiuro × Santa Rita crosses (2 = 7.50, df = 2, P = 0.0235; Kruskal-Wallis test with Tukey-Kramer test for pair comparisons); and (ii) each of the two between-range crosses involving Galiuro individuals produced significantly fewer offspring than pooled means of within-range matings of spiders from the two ranges involved in each between-range cross. That is, Sierrita × Galiuro crosses were less fecund than within-range Sierrita matings plus within-range Galiuro matings (S = 62.5, z = 2.99, P = 0.0028); whereas Galiuro × Santa Rita crosses were less fecund than within-range Galiuro matings plus within-range Santa Rita matings (S = 57, z = 3.74, P = 0 0002).