Record Details

Dellinger, Thomas;von Hegel, Gisela
Sex identification through cloacal probing in juvenile marine iguanas (Amblyrhynchus cristatus)
Journal of Herpetology
Journal Article
Amblyrhynchus cristatus
Sex identification in lizards is in most cases simple because of the existence of external sexual dimorphism, e.g., the presence or absence of femoral pores, coloration dimorphism, differences in scale counts, etc. (Conant, 1975; Laszlo, 1975; Arnold and Burton, 1978). However, in juvenile or hatchling lizards, sexual dimorphism is often lacking. Long-term field studies and behavioral studies need accurate information about the sex of individuals and the sex ratio in the population. The sex of lizards can be obtained by individually marking young animals and identifying the sex when they reach sexual maturity. This method is useful for short-lived species, but impractical for studies of long-lived species.