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Table 1 Locomotor activity rhythms of R. robustus II and R. prolixus in constant darkness

From: Rhodnius prolixus and R. robustus (Hemiptera: Reduviidae) nymphs show different locomotor patterns on an automated recording system

 

Species

Mann-Whitney test

R. robustus II

R. prolixus

U

P

N

33

64

Proportion of rhythmic insects (%)

Total

69.70

78.13

SRa

21.21

46.88

WRa

48.48

31.25

Free-running period length (Mean ± SD)b

τ23

23.17 ± 0.07

23.10 ± 0.06

NS

NS

τ1–10

23.37 ± 0.17

23.15 ± 0.12

NS

NS

τ11–23

24.29 ± 0.48

23.16 ± 0.24

347.5

0.0069

Power levels (Mean ± SD)c

Power 23

606.4 ± 71.96

799.0 ± 59.53

381.5

0.0219

Power 1–10

329.5 ± 37.19

472.3 ± 41.27

379.5

0.0206

Power 11–23

330.7 ± 34.97

398.7 ± 29.04

NS

NS

  1. aSR-“Strongly rhythmic”. Proportion of insects (%) whose power levels were above 500. WR-“Weakly rhythmic”. Proportion of insects (%) whose power levels were below 500. See results for details
  2. bFree-running period length (in hours ± SEM) was calculated in three different time windows: (i) considering all 23 days under DD (τ23); (ii) the first ten days (τ1–10); and (iii) the last thirteen days (τ11–23). See Methods for details
  3. cThe power of the rhythm was defined as the amplitude from the peak to the cutoff line (α = 0.05) in the χ 2 periodogram (Liu et al. [32]). See methods for details. The power level was calculated in three different time windows. Power 23: considering all 23 days under DD. Power 1–10: the first ten days. Power 11–23: the last thirteen days
  4. NS,- non-significant