Table 1.
Analysis of variance (ANOVA) and contrasts of infection frequencies in the ‘field parasite’ (host 1) treatments. Lake Alexandrina parasites: sym, sympatric Lake Alexandrina snails; allo, allopatric Lake Poerua snails. Lake Poerua parasites: sym, Lake Poerua snails; allo, Lake Alexandrina snails.
| ANOVA | d.f. | M.S. | F | p |
|---|---|---|---|---|
| host 1 | 1 | 0.016 | 18.047 | 0.003 |
| parasites | 1 | 0.004 | 4.859 | 0.059 |
| host 1 × parasites | 1 | 0.058 | 66.502 | <0.001 |
| error | 8 | 0.001 | ||
| contrasts | diff. | t | p | |
| Lake Alexandrina parasites | ||||
| symhost 1 − allohost 1 | 0.21 | 6.678 | 0.017 | |
| Lake Poerua parasites | ||||
| symhost 1 − allohost 1 | 0.07 | 5.266 | 0.007 | |