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Table 4 The proportion of each developmental stage of life-cycle for D. gallinae in the rearing system under the two photoperiods (Mean ± SD)

From: Darkness increases the population growth rate of the poultry red mite Dermanyssus gallinae

Dpc 12:12 h L:D 1:23 h L:D
Eggs Larvae Protonymphs Deutonymphs Adults Eggs Larvae Protonymphs Deutonymphs Adults
1 100 0 0 0 0 100 0 0 0 0
2 0 23.20 ± 8.60 76.80 ± 8.60 0 0 0 17.87 ± 3.40 82.13 ± 3.40 0 0
3 0 0 100 0 0 0 0 100 0 0
4 0 0 100 0 0 0 0 100 0 0
5 0 0 100 0 0 0 0 100 0 0
6 0 0 10.87 ± 6.59 89.13 ± 6.59 0 0 0 75.67 ± 18.54 24.33 ± 18.54 0
7 0 0 6.90 ± 4.37 93.10 ± 4.37 0 0 0 52.80 ± 26.17 47.20 ± 26.17 0
8 0 0 2.20 ± 2.25 93.73 ± 1.10 4.07 ± 1.22 0 0 23.73 ± 10.23 73.87 ± 8.36 2.40 ± 2.61
9 0.83 ± 0.06 0 0 78.60 ± 3.82 20.57 ± 3.87 2.70 ± 4.68 0 3.20 ± 3.87 77.47 ± 6.87 16.63 ± 3.40
10 3.33 ± 0.96 0 0 51.37 ± 9.50 45.30 ± 8.55 7.83 ± 3.51 0 0 58.53 ± 10.02 33.63 ± 10.75
  1. Notes: The complete life-cycle of D. gallinae, from the egg to a new egg generation, was carried out using the in vivo feeding system. The initial cohort size was 300 eggs. The observations took place every 24 h for 10 days. At each observation, the number of mites at different stages was counted under a stereomicroscope and the rate of mites at different stages was calculated every day. Observations were continued until the mites had reached the adult stage and laid the first egg