ラッテの食物選択に関する研究 (第4報)

無機塩類の選択に対するストレスの影響

抄録

Self-selections of NaCl, NaH₂PO₄, K₂HPO₄, calcium-lactate, MgSO₄ and ferric-citrate in the albino rats under long term emotional stress elicited by buzzer and shock were discussed.
Aqueous solutions were used for the selection.
NaCl selection was the largest among salts in all groups, and the individual variations were also. But there were no differences among 3 groups as to selections and periodical fluctuations as well as NaH₂PO₄, MgSO₄ and ferric-citrate selections. Selections of K₂HPO₄ and calciumlactate of Group 3 animals fluctuated markedly during the stress period.
Decrease of K₂HPO₄ selection during stress reached under 1/3 of selection in the period prior to stress and recovered to 2/3 after the stress.
Increase of calcium-lactate selection during stress reached almost 2. 4 times and recovered rapidly after the stress was removed.