Effects of front visibility interruption on irruptive behavior of sika deer, Cervus nippon.

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  • 視界の遮蔽がニホンジカの侵入行動に与える影響

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From October 2013 to July 2014, we set up nets with different degrees (0, 25, 50, 75, 100%) and patterns (horizontal stripes, vertical stripes, checkered pattern) of front visibility interruption between sika deer and food, and observed the behavior of sika deer at the Hirakawa Zoo, Kagoshima city. Some deer were wary of the net at the beginning of the experiment, but the wariness gradually decreased. Statistically significant differences were observed in the time between entry to the beast house and the first touch to the net in experiments with food conducted in October and November 2013. Deer tended to approach sooner and touch the net earlier when facing nets with low degrees of front visibility interruption. The higher the degree of interruption, the weaker the deer pushed the net. This tendency was more apparent for the nets with checked patterns as well as in June and July. We discussed factors to be considered in the construction of hedges to prevent the intrusion of sika deer.

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