References & Sources

Souping up the eggs if dad’s hot stuff

Female zebra finches that mate with an attractive male incorporate more testosterone in the eggs they lay than do females stuck with an unattractive mate.

References:

Gil, D., et al. 1999. Male attractiveness and differential testosterone investment in zebra finch eggs. Science 286(Oct. 1):126.

Sources:

Diego Gil
Université de Paris X
Laboratoire de Psychophysiologie et d’Ethologie
UPRESA-CNRS 7025
92001 Nanterre
France

From Science News, Vol. 156, No. 18, October 30, 1999, p. 283. Copyright © 1999, Science Service.