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Fig. 3 | Frontiers in Zoology

Fig. 3

From: Asian house rats may facilitate their invasive success through suppressing brown rats in chronic interaction

Fig. 3

Serum cortisol and testosterone concentration (mean ± SE) in R. norvegicus humiliatus or R. tanezumi in Experiment 1 (Exp1) (n control = 12, n treatment = 10 for R. n. humiliatus; n control = 12 and n treatment = 9 for R. tanezumi (a and b) and Experiment 2 (Exp2) (n control = n treatment = 6 for R. n. humiliatus; n control = 7 and n treatment = 8 for R. tanezumi) (c and d). Independent samples t-test or Mann-Whitney U-test; *p < 0.05, **p < 0.01

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