Armario A, Castellanos J M, Balasch J
Neuroendocrinology. 1984 Oct;39(4):330-3. doi: 10.1159/000124000.
The effect of two different population densities (3 and 9 animals/cage) on emotional reactivity, measured by their performance in an exploratory box, and pituitary-adrenal response to acute noise stress are compared. The crowded rats showed a higher defecation rate and lower exploratory activity than the control rats. Adrenocorticotropin (ACTH) response to noise was higher in the crowded than in the control rats. The results clearly indicate that crowding increased emotional reactivity in adult male rats.
比较了两种不同种群密度（3只/笼和9只/笼）对情绪反应性（通过在探索箱中的表现来衡量）以及垂体 - 肾上腺对急性噪声应激反应的影响。拥挤组大鼠的排便率高于对照组大鼠，探索活动低于对照组大鼠。拥挤组大鼠对噪声的促肾上腺皮质激素（ACTH）反应高于对照组大鼠。结果清楚地表明，拥挤增加了成年雄性大鼠的情绪反应性。
