LIFESCI 2D03 Chapter Notes - Chapter 7: Ameiurus, Optimal Foraging Theory, Evolutionary Arms Race
26 Nov 2015
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Document Summary
Animals find food using a variety of sensory modalities. Visual search can be hard in murky water. Catfish track the wake of their prey experiment. Turbid water and dense vegetation as well as nocturnal conditions reduce visibility. Minnows recognize predators and adopt anti- predation behaviours using chemoreception; Bullhead catfish use chemoreception to locate stationary food. Bees use multiple senses to enhance foraging efficiency. Gray mouse lemurs use multiple senses to find food. Visual predators find cryptic prey more effectively by learning a search image. Many predators rely on vision to find prey. Evolutionary arms race: back- and- forth process of adaptation in one species favouring counteradaptation in another. Search image: visual distinctive feature of a single prey type that, once learned, can enhance prey detection. Cryptic coloration reduces predator efficiency in trout. Blue jays use a search image to find prey. The optimal diet model predicts the food types an animal should include in its diet.
