Table 1.
Experimental design matrix
| Stickleback origin | NO | DE | NO♀ × DE♂ | DE♀ × NO♂ | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stickleback family | A | B | C | D | E | F | G | H | I | J | K | L | |
| S. solidus origin | S. solidus family | ||||||||||||
| DE | P_1 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | - | - | 20 | - | - |
| P_3 | 20 | 20 | 20 | 20 | 20 | 20 | - | 20 | - | - | 20 | - | |
| P_5 | 20 | 20 | 20 | 20 | 20 | 20 | - | - | 20 | - | - | 20 | |
| Total | 180 | 180 | 60 | 60 | |||||||||
| NO | P_2 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | - | - | 20 | - | |
| P_4 | 20 | 20 | 20 | 20 | 20 | 20 | - | 20 | - | - | 20 | - | |
| P_6 | 20 | 20 | 20 | 20 | 20 | 20 | - | - | 20 | - | - | 20 | |
| Total | 180 | 180 | 60 | 60 | |||||||||
| Control | - | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Total | 60 | 60 | 60 | 60 | |||||||||
Reciprocal infection scheme of 1200 sticklebacks from Norwegian (NO), German (DE), NO-maternal hybrid (NO♀ × DE♂) and DE-maternal hybrid (DE♀ × NO♂) families (three families each, labelled by capital letters A through L) exposed to sympatric and allopatric Schistocephalus solidus families (three families each)