摘要：We measured the length, width, volume, and weight of 871 freshly laid eggs of 28 clutches of Ctenosaurapectinata. The iguanas were obtained from a tropical dry forest area in central Mexico. The relative clutch mass wasrelated positively to the average egg weight but not to average egg volume. Unlike what usually occurs in lizards,where the body length strongly predicts egg production, in C. pectinata clutch size and egg size were not correlatedwith female weight or snout-vent length. Observed differences revealed variation in the weight-size of the egg within anindividual clutch. Therefore, there is not an optimization of the egg in the studied population of Ctenosaura, as usuallyoccurs in small lizards. This variation associated with reproduction takes place in the middle of the dry season, andmay be interpreted as an adaptation to facilitate the adjustment of different phenotypes in environments with extremedrought.
