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. Author manuscript; available in PMC: 2016 Nov 1.
Published in final edited form as: Evolution. 2015 Oct 13;69(11):2820–2830. doi: 10.1111/evo.12785

Table 1. Pairings of host and parasite populations for assays of ruby-throated frequency and fecundity.

A. Interaction: experimental host and parasite populations combined1 B. Interaction: host and parasite populations paired as in experimental selection2
Host Parasite Host Parasite
ancestor ancestor (Sm2170) singly-passaged ancestor
control control ancestor singly-passaged
singly-passaged singly-passaged co-passaged co-passaged
co-passaged co-passaged
C. Host alone: experimental host populations with ancestral parasites3 D. Parasite alone: experimental parasite populations with ancestral hosts4
Host Parasite Host Parasite
control ancestor ancestor control
singly-passaged ancestor ancestor singly-passaged
co-passaged ancestor ancestor co-passaged
1

Compares host and parasite lines paired according to shared evolutionary history. If coevolution contributes to reduced antagonism, the response to selection for reduced antagonism will be greatest in the co-passaged pairing.

2

Compares pairings that were selected upon during experimental evolution to further test the prediction that the response to selection for reduced antagonism will be greatest in the co-passaged pairing.

3

Compares changes in passaged host lines independent of the parasite to test if the reduced antagonism observed in the co-passaged pairing can be attributed to evolution of co-passaged host populations alone.

4

Compares changes in passaged parasite lines independent of the host to test if the reduced antagonism observed in the co-passaged pairing can be attributed to evolution of co-passaged parasite populations alone.