Open-field behavior of C57BL/6J mice: Effect of illumination, age, and number of test days
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TL;DR
The results of this study show the importance of testing Ss at several different ages and under several stimulus conditions before making general conclusions about the behavior of a particular strain.
Abstract
C57BL/6J mice were tested at either 50 or 100 days of age under one of two illumination levels in the open field for 10 consecutive days. Analysis of activity scores revealed a reliable Age by Illumination interaction, indicating that illumination had different effects at the two ages. Overall defecation scores formed an inverted U-shaped function over test days, with defecation increasing through the 6th test day, but then decreasing over the remaining days. The results of this study show the importance of testing Ss at several different ages and under several stimulus conditions before making general conclusions about the behavior of a particular strain.