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Growth and Exploratory Behavior of Premature Rats

Frank Konishi and Gina H. Y. Sun

Department of Food and Nutrition, Southern Illinois University, Carbondale, Illinois 62901

The growth and exploratory behavior of 1-day premature rats obtained by cesarean section and nursed by foster dams were investigated. The premature rats were significantly smaller in body weight than the controls. The premature rats also exhibited significantly lower exploratory activities after 12 weeks of age. No differences were observed between the control and premature groups in frequencies of urination or defectation which were observed as expressions of emotionality. Age and size of rats at birth appear to be associated with subsequent growth and exploratory behavior.

KEY WORDS: • behavior • growth • premature

Manuscript received 11 November 1971.




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