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Table 2.

Summary of the richness analysis and parameters of the cumulative curves of species for 11 component communities of helminths of freshwater fishes from Río Apazapan, basin of Río La Antigua, Veracruz, Mexico (in all cases the correlation coefficient R2 between observed data and Clench’s model > 0.96).

Host species No. of hosts examined (n) No. of helminth species (Sobs) Parameters of Clench
Richness estimated by Clench model a/b Slope Clench a/(1 + b × n)2 Bootstrap nonparametric estimator Sb
a b
A. mexicanus 18 9 2.212358 0.198432 11.1 0.1058 10.35
S. gymnogaster 6 1
R. guatemalensis 30 10 1.964535 0.170238 11.5 0.0526 11.26
P. bimaculata 29 8 4.684552 0.550558 8.5 0.0162 8.25
P. mexicana 28 7 1.971636 0.249048 7.9 0.0310 7.54
P. sphenops 31 7 1.289638 0.157334 8.1 0.0373 7.86
P. gracilis 30 6 1.861581 0.291741 6.4 0.0195 6.25
X. helleri 20 6 2.784144 0.427796 6.5 0.0304 6.51
S. marmoratus 7 3 3.685704 1.055253 3.4 0.0523 3.09
T. ellioti 26 6 2.236039 0.339503 6.5 0.0231 6.41
V. fenestrata 19 10 2.020171 0.160467 12.6 0.1232 11.91

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