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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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