Analysis of variance comparing within patch variance of Siphonaria concinna and S. serrata in 7 regions along the 1500 km of the limpets’ biogeographic range in small and large patches.

Region (Western Cape, South Western Cape, Southern Cape, Eastern Cape, Southern Transkei, Northern Transkei and Kwa-Zulu Natal) was a random factor, Species (S. concinna or S. serrata) was fixed and orthogonal, Size (small or large) was fixed and orthogonal, and n = 4 replicate patches. Data were Ln(x+1) transformed to satisfy homogeneity of variances, Cochran’s Test C = 0.18. Post hoc Student-Newman-Keuls (SNK) tests were done for significant sources of variation to examine the direction of differences relevant to hypotheses of interest (highlighted in bold).xDenotes post hoc pooling when P>0.25. New F ratios are given for those tested against the pooled terms.