Strain differences of the light-dark preference in inbred rats.
The present study examined strain differences in the light-dark preference among four strains of rats. The test was done in the home-cage situation under 12L:12D cycles. Data from four strains were compared: BN/Kyo, BDIX/Nem, Wistar/Nu, and F344/NSlc. These strains differed in the light-dark preference measured by the ratio of the time spent in the field area of the home cage during the light period. BN/Kyo and BDIX/Nem spent the most time (approx. 23%) in the field during the light period, while F344/NSlc spent the least time (approx. 5%). Wistar/Nu fell between the two (approx. 12%).
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D000818:Animals; D001362:Avoidance Learning / Q000502:physiology*; D002940:Circadian Rhythm; D003623:Dark Adaptation; D008027:Light; D008297:Male; D009043:Motor Activity / Q000502:physiology; D051381:Rats; D011919:Rats, Inbred Strains / Q000235:genetics*; D013045:Species Specificity