Abstract

House mice, Mus musculus, were snap-trapped from two similar fields near Memphis International Airport, Shelby County. Tennessee, the only apparent difference being presence or absence of low-flying aircraft. Airport field noise levels ranged from 80 to 120 dB while rural field levels ranged from 80 to 85 dB. Mice from the airport field had significantly larger adrenal glands than those of the rural field. To determine if noise was the causative stressful factor, mice collected from the rural field were subjected to recorded jet noises at 105 dB in the laboratory for 2 wk. The experimental group had significantly larger adrenals than those of a control group.

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