marginally nonsignificantP = 0.051
The difference in mean macroinvertebrate counts between open samplers (50.0; SE 4.7) and closed samplers (36.7; SE 4.8) was marginally nonsignificant (effect of cage F 1,44 = 4.01, P = 0.051) in an analysis that also included effects of river, treatment, and session.