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Table 1 Absolute increase of plasma cortisol values in a stress reactivity test

From: Effects of domestication on biobehavioural profiles: a comparison of domestic guinea pigs and wild cavies from early to late adolescence

   Early adolescence Late adolescence
R1-I (ng/ml) Median domestic 586.5 872
  Median wild 1683 1609
U 0 0
p 0.001 0.001
R2-I (ng/ml) Median domestic 1059.5 1308,5
  Median wild 2438 2208
U 0 6
p 0.001 0.001
R3-I (ng/ml) Median domestic 1052 1056
  Median wild 2563 1836
U 4 2
p 0.001 0.001
R4-I (ng/ml) Median domestic 717 714,5
  Median wild 1927 1843
U 2 0
p 0.001 0.001
MAX-I (ng/ml) Median domestic 1133.5 1436.5
  Median wild 2574 2208
U 0 0
  p 0.001 0.001
  1. Domestic guinea pigs and wild cavies were transferred from their familiar home enclosure to a novel enclosure for four hours. The absolute increase from initial values (I, in home enclosure) to values after 1 h (R1), 2 h (R2), 3 h (R3), and 4 h (R4) in the novel enclosure as well as from I to the maximal response value (MAX, maximum value of R1-R4) are shown. The responses of guinea pigs and cavies were compared during early and late adolescence. Ndomestic = 10, Nwild early = 8, Nwild late = 7. Significant p-values are highlighted in boldface.