Record Details

Werner, Dagmar I
The effect of varying water potential on body weight, yolk and fat bodies in neonate green iguanas
Journal Article
Iguana iguana
The effect of water potential of the incubation substrate on body, yolk and fat body mass was examined in green iguanas (Iguana iguana). Egg clutches of 12 females from central Panama were subdivided and incubated at three water potentials, dry, intermediate, and wet. Dry as well as wet incubation resulted in small hatchlings. Yolk conversion was highest in intermediate water potential, yielding the heaviest hatchlings with the smallest amounts of residual yolk. Masses of fat bodies did not differ significantly in the three treatment groups. Yolk reserves apparently provide energy for leaving the nest and for the first stage of dispersal. Fat bodies provide energy for three additional days of hatchling subsistence. These data support that incubation moisture and the presence of fat bodies have survival value for green iguana hatchlings.