The Effect of Predation Risk on Animals' Behavior and Their Decision

Abstract

Abstract: The research progress of the effect of predation risk on animals' behavior and their decision was introduced in the paper. In recent decade, a lots of researches dealt with effects of predation on prey foraging behavior (including when to feed, where to feed, what to eat, how to consume), habitat selection and defensive behavior in the various types of ecological systems. The results showed that animals had the ability to assess and control their risk of being pred in ecological time and they could incorporate this information with their making of decision during the lifetime. Some researches suggested that the decision reflected apparent trade_offs between the risk of predation and the benefits to be gained from enaging in a given activity. It was stressed that predation risk was an important and necessary trade_off factor for animals' decision making. In addition, the effect of indirect predation at community level was one of the forces of shaping community structure and become an important way for studing mechanism of community organization. At the population level, it also may be significant advers effecting on population distribution, density and reproduction.

Key words: wintering waterfowl, East Dongting Lake, environmental factor, canonical correspondence analysis (CCA), tvalue biplot.

Bian Jianghui, Fan Naichang. The Effect of Predation Risk on Animals' Behavior and Their Decision[J]. cje, 1997, (1): 34-39.

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