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. 2022 Jun 3;11(6):647. doi: 10.3390/pathogens11060647

Table 3.

Results of correlation analyses testing the relationship between the number of Trichobilharzia sp. “peregra” cercariae emerged from naturally infected Radix balthica snails in field experiments and water temperature, light intensity or snail shell length. Results are displayed for each day of experiment separately and pooled across days. Statistically significant results (at α = 0.05) are indicated in bold.

Season/
Experimental Dday
No. of Snails Temperature Light Intensity Snail Length
r a p b r p r p
August 2016
Day 1 6 −0.680 0.320 −0.317 0.683 0.463 0.296
Day 2 6 c c −0.358 0.430
Pooled data 6 c c 0.382 0.397
August 2017
Day 1 6 −0.164 0.793 0.080 0.897 0.486 0.329
Day 2 5 0.042 0.947 0.265 0.667 −0.004 0.995
Day 3 2 0.416 0.486 −0.495 0.397 d
Pooled data 6 0.145 0.606 −0.103 0.715 0.251 0.632
August 2018
Day 1 6 −0.224 0.717 −0.012 0.985 0.329 0.525
Day 2 6 −0.276 0.653 −0.295 0.630 0.233 0.657
Day 3 6 0.713 0.176 −0.650 0.235 0.497 0.316
Pooled data 6 −0.116 0.717 −0.281 0.352 0.511 0.301
October 2018
Day 1 6 −0.873 0.053 0.510 0.380 0.958 0.003
Day 2 6 −0.401 0.503 −0.149 0.811 0.790 0.062
Day 3 6 0.406 0.498 −0.119 0.849 0.740 0.092
Pooled data 6 −0.018 0.948 −0.080 0.776 0.844 0.034

a Pearson’s correlation coefficient, b level of significance, c Not evaluated due to 12 h diel interval, and d Not evaluated because only two snails were available.

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