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

Table 3 CTEs and sex ratios predicted for field nests based on measured and estimated sand temperatures

Nest ID^a	Sex of embryos sampled from nest		Range of Constant Temperature Equivalents (CTEs, °C) based on:			Predicted sex ratio based on:
	No F	No M	Measured nest temps	Modelled sand temps		Nest CTEs	Weather station sand CTEs	AWAP sand CTEs
	No F	No M	Measured nest temps	Weather station	AWAP	Nest CTEs	Weather station sand CTEs	AWAP sand CTEs
2	11	4	30.3–30.3	29.9–30.0	30.1–30.5	X	X	X
3	12	3	30.3–30.4	29.8–30.1	30.0–30.6	X	X	X
5	8	6	30.4–30.6	30.5–30.7	31.3–31.8	X	X	F
12	12	0	29.9–30.3	30.2–30.3	30.0–31.1	X	X	X
13	9	3	30.6–31.0	30.4–30.4	31.4–31.5	X	X	F

Sand temperature models were driven either by weather station data or the AWAP climate data, and CTEs in all instances were calculated from temperatures during the thermosensitive period. Predicted sex ratios are classified as female (F; <5% males), mixed (X; 5–95% males) or male (M; >95% males). Classifications in italics indicate correct assignments based on the sexes of embryos sampled from each nest.
^aThis subset of nests was not used for fitting the TSD function.

ISSN: 2053-7565