Fig. 2From: Reciprocal cross infection of sticklebacks with the diphyllobothriidean cestode Schistocephalus solidus reveals consistent population differences in parasite growth and host resistanceRelative parasite weight in sticklebacks of different origin. Parasite index (%) in (a) pure NO- and pure DE-sticklebacks and (b) in F1 hybrid sticklebacks of both parental combinations. Significant differences in S. solidus from the two origins within sticklebacks of the same origin (vertical comparison), as well as of S. solidus of the same origin between sticklebacks of different origin (horizontal comparison), are indicated by * (P < 0.05)Back to article page