LIFESCI 2D03 Lecture 20: Lecture 20
12 Jan 2018
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Document Summary
Chickadees knock smaller seeds out of the feeder until they find a larger sunflower seed. Animals selectively choose where, on what, and how long to forage, often passing up some food items in favour of others. Animals find food using a variety of sensory modalities. Bees use multiple senses to enhance foraging efficiency. * assumes jays of nonrun treatment does not learn search image: results: correct responses increase in the run, but not in the nonrun. Jays were using a search image of the moth species, and another study confirmed that when jays form a search image of one moth type, their ability to find others decrease. The optimal diet model predicts the food types an animal should include in its diet. Optimal foraging theory (oft) assumes natural selection has favoured feeding behaviours that maximize fitness. Assumes fit(cid:374)ess (cid:449)hile feedi(cid:374)g is a positi(cid:448)e fu(cid:374)ctio(cid:374) of a(cid:374) i(cid:374)di(cid:448)idual"s e(cid:374)ergy i(cid:374)take rate: energy acquired while feeding divided by total feeding time.
