Reproductive hormonal profile in Eastern Pacific green turtles captured in-water

The Eastern Pacific green turtle (EPGT) has been differentiating from the green turtle and is currently considered a separate population. This study determined the values of reproductive hormones and total thyroxine of 56 resident foraging green turtles captured between 2012 and 2014 at Golfo Dulce, Costa Rica. All of them underwent a physical examination and were deemed as healthy individuals. The progesterone values were 0.31–2.723 ng/ml, estradiol 25.54–104.129 pg/ml, testosterone 1.94–228.97 ng/dl, and thyroxine 0.5–0.9 µg/dl. Since our population did not show sexual dimorphism, and the curved carapace length sizes did not match previous reports, turtles’ sex was determined based on high testosterone concentrations. Our results showed that 48 males (> 3 ng/dl), three females (