ROLE OF TIME AND ENERGY IN FOOD PREFERENCE
ROLE OF TIME AND ENERGY IN FOOD PREFERENCE
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DOI：
10.1086/282455
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发表时间：
1966-01-01
影响因子：
2.9
通讯作者：
EMLEN, JM
中科院分区：
文献类型：
--
作者：
EMLEN, JM
建立了最优食物偏好关系与潜在食物来源的卡路里产量/单位时间的关系模型。根据这一模式，建议：只有在已知饮食的相对频率和食物类型的相对丰度以外的若干因素的情况下，才能充分描述食物偏好；动物在食物饱足或常见时对食物的选择应更加挑剔，在饥饿或食物匮乏时应更加不分青红皂白；动物可能吃一种食物类型，相对于其丰富程度，比吃另一种食物的频率更高，即使另一种食物更丰富和更有效地开发。这发生在第一食物类型的相对丰度较高的情况下；捕食者倾向于通过潜在食物的程度可以用来评估食物在捕食者种群限制中的作用；食物偏好似乎很容易和适当地随着环境的变化而改变。
A model which relates optimal food preference relationships and caloric yield/unit time of potential food sources is derived. It is suggested, on the basis of this model, that: food preferences can be adequately described only if a number of factors other than relative frequencies in the diet and relative abundances of the food types are known; animals should be more selective in their choice of foods when satiated or when food is common, more indiscriminate when starved or when food is scarce; animals may eat 1 food type with greater frequency, relative to its abundance, than another even if the other food is richer and more efficiently exploited. This occurs in situations of high relative abundance of the 1st food type; the extent to which predators tend to pass by potential food items may be used to evaluate the role of food in the population limitation of a predator sp; food preferences appear to change readily and appropriately to changes in the environment.