Table 3:

Summary of immune and general-health physiological alterations of tourist-visited penguins relative to non-visited controls in the colony at Punta Tombo and their effect size ranges (see Statistics for details)

Parameter	Direction of effect	Effect size range
Adults
Heterophil counts	Higher	1.14–1.26
Eosinophil counts	Higher	0.54–0.57
H/L ratio	Higher	0.80–0.88
Chicks
Bactericidal capacity	Lower	0.58–0.59
Bacterial agglutination	Lowera	0.44–0.45
PHA response	Higher	1.19–1.20
Glucose levels	Lower	1.43–1.96
Haematocrit	Lower	0.84–1.1

^aMarginally significant effect.