marginally non-significantP = 0.052
A comparison excluding the free tadpoles from the analysis indicated that the difference in infection load between tadpoles in cages at the bottom or top of tanks was marginally non-significant (LRT: χ 2 = 3.79, df = 1, P = 0.052), whereas the difference in prevalence was significant (χ 2 = 6.12, df = 1, P = 0.013).