High fidelity

日期:2018-01-05 03:04:19 作者:阮光 阅读:

A MALE sleepy lizard’s devotion to its female partner is puzzling biologists. Michael Bull of Flinders University near Adelaide tracked sleepy lizards (Tiliqua rugosa) in South Australia. The lizards formed pairs in early spring, and remained together until they mated in November. Some pairs stayed together for five years. “That long-term monogamy has never been reported in any other reptile in the world,” says Bull. The researchers also carried out “divorce experiments”, in which males and females were swapped around. Male sleepy lizards showed no interest in the female divorcees, the team will say in Behavioral Ecology and Sociobiology. Why the lizards are monogamous is unclear,