Adaptive variation in the development of extraembryonic membranes of gekkotan lizards: a meta-analytical approach

Column Number. Column name. Comments. 1. Species. Species used in analyses. Sources listed in text Table 2. 2. RSG+FSG, FSOL groups. Groups used as the ‘by’ variable in some analyses. 3. RSG, FSG, FSOL groups. Groups used as the ‘by’ variable in some analyses. 4. Data set. YSCAM: observations made by the author on the relative surface areas of the YS and the CAM from oviposition to hatchling; VO2: observations from the literature on the relative metabolic rates of embryos from oviposition to hatching. 5. %YS. Surface area of the YS expressed as a percentage of the surface area of the egg. 6. %CAM. Surface area of the CAM expressed as a percentage of the surface area of the egg. 7. Supplemental Observations. See last paragraph of Section 2.1. 8. Stage. Embryo developmental stage at each observation in the YSCAM data set based on Dufaure and Hubert (1961). 9. Age. Embryo age at each observation in the YSCAM and the VO2 data sets. The day of oviposition is Age 0. 10. Days added to age. Days added represent the time elapsed between stage 25 and the observed stage at oviposition to correct for variable stages at oviposition. Values are based on a mean in utero temperature of 28C. See Section 2.2 for details. 11. Corrected age. The sum of Age and Days added to age. 12. Relative age. Corrected age divided by Corrected incubation length. 13. Incubation length. Observed incubation length at the constant incubation temperature in Column 18. 14. Corrected incubation length. The sum of Incubation length and Days added to age (Columns 13 and 10). 15. VO2 mL/h. Metabolic rate at each observation. 16. VO2Max. Largest value of metabolic rate. 17. %VO2. VO2 divided by VO2Max expressed as a percent. Se also Column 24. 18. Incubation temperature. The constant temperature in degrees C during incubation. 19. Stage at oviposition. Mean embryo stage on the day of oviposition based on the Dufaure and Hubert (1961) scheme. 20. Hatchling mass g. Mean live mass on the day that eggs hatched. 21. Egg mass g. Mean egg mass at oviposition 22. Predicted stage. See Section 2.2 for calculations. Predictions were applied only to the VO2 data set where only stage was known. 23. Stage – Predicted stage. Observed stage minus Predicted stage for the YSCAM data set. This metric is an index of the accuracy of the prediction of stage. 24. Pruned temperature. Data pruned to one observation per species and displayed for age = 0.