Table 1 Morphometric characterization of the poison glands of Taricha granulosa LW− and SC+ populations.

From: Variations in tetrodotoxin levels in populations of Taricha granulosa are expressed in the morphology of their cutaneous glands

Population

Sex of specimen

Number of glands per mm2

Number of cells Type I

Number of cells Type II

Poison gland vol (µL)

Σ volume Type I cells (%)

Σ volume Type II cells (%)

Lake in the Woods (LW−)

M

F

M

M

18

14

13

16

1

1

3

1

11

10

7

8

0.00769

0.00761

0.00299

0.00347

16.83

18.00

39.68

5.80

83.17

82.00

60.32

94.20

Soap Creek (SC+)

M

F

F

M

13

15

19

18

1

1

1

1

8

6

4

7

0.01147

0.00579

0.00380

0.00443

87.52

76.83

82.96

63.23

12.47

23.17

17.03

36.77

p value

 

0.5921

0.391

0.07

0.682

0.0006*

0.0006*

  1. Note that the populations differed with respect to the relative volume of two types of cells within the poison glands. Significant statistical difference (*). Male (M), female (F).
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