Sentences with phrase «juvenile male rats»
Starting with juvenile male rats, which tend to be most playful, he spends a week or two letting them get used to being tickled on the back and belly.
http://www.sciencemag.org/
Juvenile male rats usually engage in more social play than females, but female rats that received the drug frolicked just as much as the males.
Not exact matches
This is in agreement with findings in juvenile male and female rats with low levels of gonadal hormones.