Toni E. Ziegler
PER
Toni E. Ziegler Ziegler
Male marmosets and tamarins are known for being good parents, said the study's lead author, Toni E. Ziegler of the Wisconsin National Primate Research Center at the University of Wisconsin. The hormones involved were associated with paternal infant care, and Dr. Ziegler and colleagues at the center wondered whether they might affect the animals' bodies. In the monkeys, however, Dr. Ziegler said, hormones are probably at work. She said that if it is this hormone prolactin, which we suspect, it can actually change the metabolism of the monkey. She also said that the hormonal changes are most likely set off when the male detects some chemical produced by the pregnant female.