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Table 1 Survival and feeding rates of D. gallinae with photoperiod of 1:23 h L:D

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

Variable Photoperiod Days post-challenge
7 14 21 28
Feeding rate (%) 1:23 h L:D 52.0 ± 7.0 36.7 ± 1.1 44.8 ± 5.9 50.5 ± 1.9
Survival rate (%) 1:23 h L:D 98.9 ± 0.6 98.9 ± 0.2 98.1 ± 0.1 98.6 ± 0.1
  1. Notes: Chicks were challenged with 220 D. gallinae at 0 dpc and kept on prolonged darkness photoperiod of 1:23 h L:D. The numbers of dead and fed D. gallinae were recorded at 7, 14, 21 and 28 dpc. Survival and feeding rates were calculated as follows: Survival rate (%) = Number of surviving mites/Total number × 100%; Feeding rate (%) = Number of feeding mites/Total number × 100%. All values are shown as mean ± SD from three independent experiments