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Table 1 Design of the back-switch experiments used to delineate the thermosensitive period

From: Models of primary sex ratios at a major flatback turtle rookery show an anomalous masculinising trend

Treatment

Switch regime

Starting day of switcha

Length of switcha(d)

Proportion developed at start

Proportion developed at end

1

28°C–32.5°C–28°C; MFM

25

6

35

50

2

28°C–32.5°C–28°C; MFM

35

6

50

65

3

28°C–32.5°C–28°C; MFM

25

4

35

45

4

28°C–32.5°C–28°C; MFM

32

4

46

56

5

28°C–32.5°C–28°C; MFM

38

4

55

65

6

28°C–28°C–28°C; M control

25

6

-

-

7

32.5°C–28°C–32.5°C; FMF

16

10

35

50

8

32.5°C–28°C–32.5°C; FMF

22

10

49

64

9

32.5°C–28°C–32.5°C; FMF

16

7

35

45

10

32.5°C–28°C–32.5°C; FMF

20

7

45

55

11

32.5°C–28°C–32.5°C; FMF

24

7

54

64

12

32.5°C–32.5°C–32.5°C; F control

16

10

-

-

  1. aDue to the influence of temperature on physiological rates, switches to the female-producing temperature started later than those to the male-producing temperatures; similarly, the lengths of the switch windows were longer at the male-producing temperature.