Table 2 Weight and size of the left and the right adrenal gland in three age groups

1

The youngest bison – up to 2 years-old (n = 58)

44.52 ± 8.91

19.92 ± 3.26

8.39 ± 1.43

4.16 ± 1.84

0.033 ± 0.013

2

Adolescent bison – 3–5 years-old (n = 14)

59.21 ± 4.19

26.70 ± 3.34

10.96 ± 1.54

9.31 ± 1.72

0.025 ± 0.005

3

Adult bison – older than 5 years (n = 25)

66.50 ± 7.11

30.29 ± 2.32

10.94 ± 1.11

12.14 ± 2.04

0.028 ± 0.005

class 1 vs. 2

<0.001^a

<0.001^a

<0.001^a

<0.001^a

0.090

class 2 vs. 3

0.046^a

0.007^a

0.999

<0.001^a

0.681

1

The youngest bison – up to 2 years-old (n = 58)

32.82 ± 6.22

23.93 ± 4.34

9.75 ± 1.83

4.08 ± 1.73

0.034 ± 0.014

2

Adolescent bison – 3–5 years-old (n = 14)

45.56 ± 6.18

33.50 ± 3.52

12.28 ± 2.10

9.66 ± 2.34

0.026 ± 0.006

3

Adult bison – older than 5 years (n = 25)

48.00 ± 5.50

35.06 ± 4.55

13.94 ± 2.74

11.28 ± 1.80

0.027 ± 0.005

class 1 vs. 2

<0.001^a

<0.001^a

0.006^a

<0.001^a

0.191

class 2 vs. 3

0.536

0.603

0.098

<0.001^a

0.985