Ew 91219 40

For each turtle captured morphometric measurements were taken using a flexible 100 cm measuring tape and Mini Vernier plastic Calipers (precision: 0.05 mm). These included head width (HW), curved carapace length (CCL), curved carapace width (CCW), tail to carapace length and tail to plastron length, as per standard methods. In addition, each turtle was weighed with a precision of ±0.5 kg. The sex of an immature sea turtle cannot be determined with confidence on the basis of an external examination but adults were sexed based on the external sexual dimorphism of mature hawksbill turtles (Avens and Stover, 2013 ). An EBRO^® Compact J/K/T/E thermocouple thermometer was used to obtain all temperature readings (model EW-91219-40; Cole-Parmer, Vernon Hills, IL, USA). Core body temperatures were recorded from the cloaca using the probe EBRO^® T PVC epoxy tip 24GA × 1 m in length, which was inserted approximately 10 cm into the cloaca.
Respiratory rates per minute were measured by visualization and the heart rate with a Doppler ultrasound probe (Parks Medical Electronics, Inc., Aloha, OR, USA) in the area of the carotid artery. Two heart rates were recorded, one as soon as possible after capture, and the second just prior to release.

A flexible measuring tape was used to determine curved carapace lengths (CCL). The sex of an immature sea turtle cannot be determined with confidence on the basis of an external examination [8] . Green turtles in the Galapagos have the slowest reported growth rate for this species [26] . Although the smallest nesting female recorded for the archipelago is 60.7 cm CCL, two peaks for nesting females exist at 80 and 95 cm CCL [59] . Furthermore, laparoscopic gonad assessment of green turtles has shown size at maturity is highly variable [20] . Therefore, we used a relatively large size of 80 cm CCL as a threshold to distinguish immature from mature individuals. Adults were sexed on the basis of the external sexual dimorphism of adult green turtles, while some smaller individuals could also be sexed as males by their evident secondary sexual characteristics [54] , [57] . An EBRO^® Compact J/K/T/E Thermocouple Thermometer was used to obtain all temperature readings (model EW-91219-40; Cole-Parmer, Vernon Hills, Illinois, USA 60061). Core body temperatures were recorded from the cloaca using the probe T PVC epoxy tip 24GA×3 ft in length.