Regulation of Incubation Water Loss in Eggs of Seven Species of Terns

摘要: Water loss during incubation in the eggs of seven species terns are reported. The nesting sites ranged from a relatively cold region, southern Alaska, to tropical climate equatorial Pacific Ocean. In addition, measurements various physical parameters and eggshells were made, including water-vapor conductance fresh egg, which allows one calculate total effective pore area shell. rate water was proportional egg weight (9-39 g) but inversely period (21-36 days); all lost about same fractional amount water, namely, 14% their initial weight. is determined by species-specific or geometry shell, provided that pressure difference 27 torr maintained between microenvironment nest. Since incubating temperature is...