BIOLOGY 1M03 Lecture 30: Lecture 30
Document Summary
Worry about if they will be eaten by something else. Need to balance attractive features of a food time vs. being in the right place to get that food. Eating something because there is a lot of it doesn"t mean you prefer it. Foraging decisions: the currency is tness, in short term, maximize tness but amount of food they can get. White-fronted bee-eaters are native to east africa: they all live in one place, but go somewhere else for food, this makes sense, if them moving farther gives them more food. Foraging trade-offs: energy returns should be proportional to the energy costs to get there, but this is not necessarily true, its correlated! Not real proportional: bee-eaters go farther for richer resources, is reward linear, is travel cost linear, should there be a preferred distance, perhaps an ideal free distribution. Top-down control foraging: ex. bluegill sun sh use habitat differently when predators are present.
