Abstract
AbstractHandling disturbances alone repeated daily for ten days caused marked changes in the fat stores of a fish, Fundulus chrysotus, a lizard, Anolis carolinensis, a quail, Coturnix c. japonica, and a mouse, Mus musculus. Repeated handling also caused changes in the weights of the male reproductive organs in the lizard and mouse. Whether the effects of handling were stimulatory, inhibitory, or of no effect depended on the time of the disturbance with respect to a daily 16‐hour photoperiod. The results should serve as a warning to investigators in many areas in which experimental subjects are handled in one way or another at the same time each day.
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