Table 4.
Values of C1,2 index that measure the association between two species, and A1,2 index that compare the relative intensity of intraspecific aggregation versus interspecific aggregation in a pair of species. Number of positive and negative values of C1,2 (±) within fish infected by both species of monogenean pair. Below diagonal number of values of Ai,j > 1 within fish infected by both species of monogenean pair, [and range min – max of A1,2 > 1 values]. Abbreviations: Ana, A. anacanthocotyle; Ans, Anacanthocotyle sp.; Cac, C. chajuli; Cas, Cacatuocotyle sp.; Cex, C. exiguum; Cha, C. costaricensis; Dac, Dactylogyridae gen. sp.; Dia, D. kabatai; Gyn, G. neotropicalis; Gys, Gyrodactylus sp.; Pal, P. heteroancistrium; Uro, U. strombicirrus. (*) species more frequent and abundant in our samplings.
| *Cha | *Pal | *Ana | *Cac | *Dia | Ans | Cex | Cas | Gyn | Gys | Uro | Dac | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| *Cha | 6/7 | 4/12 | 3/7 | 5/7 | 0/1 | 3/3 | 1/0 | 0/2 | 0/2 | 0/2 | 0/3 | |
| *Pal | 9 | 0/12 | 2/2 | 2/9 | 0/1 | 2/1 | 0/1 | 0/1 | 0/2 | 0/2 | 0/3 | |
| *Ana | 9 | 5 | 2/7 | 2/8 | 0/1 | 1/4 | 0/1 | 1/1 | 0/2 | 0/2 | 2/1 | |
| *Cac | 4 | 1 | 1 | 3/3 | 1/2 | 0/1 | 0/1 | 0/1 | ||||
| *Dia | 3 | 3 | 1 | 0 | 0/1 | 2/1 | 1/0 | 0/1 | 0/2 | 0/2 | 0/3 | |
| Ans | 0 | 0 | 0 | 0 | 1/0 | 0/1 | ||||||
| Cex | 1 | 1 | 0 | 0 | 1 | 0/1 | ||||||
| Cas | 0 | 0 | 0 | 0 | 0 | 0/1 | ||||||
| Gyn | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0/1 | ||||
| Gys | 0 | 0 | 0 | 0 | 0 | 0/2 | ||||||
| Uro | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |||||
| Dac | 0 | 0 | 0 | 0 | 0 | 0 |