95 Figure 20. Geographical location of the study area. A: New Caledonia, South West Pacific. B: Monitored nesting areas, the Roche Percée beach, commune of Bourail, and the coral-islets of the Grand Lagon Sud, off the southern end of the mainland, Southern Province of New Caledonia. Land is shown in light gray and shallow reefs are shown in blue (shapefile source: Millenium Coral Reef Mapping Project Andréfouët et al. 2009). Dashed brown lines indicate the extent of the UNESCO world heritage areas. Red dots indicate the location of the nesting beaches where the temperature loggers were deployed, and associated numbers refer to supplementary information upon nesting beaches whereabouts, available in Table 8 SI Appendix. Data visualization has been carried out with QGIS (version 3.34.3). 3.2 Temperature loggers Nest temperature was recorded in the RP and the GLS areas using two brands of temperature loggers: the iButton® temperature data loggers (Maxim Integrated, Model DS1922 L) and the HOBO® pendant temp loggers (Onset Computer Corp., Model HOBO0167 64K). Hereafter, these data loggers are referred to as iButtons and HOBOs, respectively. An accuracy of ±0.5°C is reported by manufacturers for both devices. Devices were programmed to log temperature measurements every 120 min for an unlimited period. Loggers were placed above the last deposited eggs in order to minimize the putative impacts on the eggs, directly after the female was observed laying eggs or during the following morning based on available nesting cues left in the sand. In the latter case, nests were dug out to reach the shallowest eggs but they were never excavated in order to minimize the impacts of the manipulation over incubating eggs. Temperature loggers were recovered after full emergence of the monitored nests so that it would not interfere with embryo development or hatchling emergence. In the RP area, where monitoring patrols are operated on a daily basis, recoveries were conducted 24-72 hours following the observation of the main emergence. In the GLS area, where daily monitoring is not possible because of the nesting islets remoteness, dedicated field trips were set up at a
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