BIOL 2260 Lecture Notes - Lecture 11: Functional Response, Natural Selection
5 Jul 2016
School
Department
Course
Professor
Document Summary
Predation: the killing and consumption of a living organism by another. Helps us understand prey defences and predator offences. Predation affects the density and distribution of prey. The change in predator density with prey density. Demographic response: increases in predators result of higher birth rate or lower death rate. Aggregational response: predators clustering in areas of high prey density. Number of prey in population removed by predators per unit time for given density. Sigmoidal type iii functional response promotes coexistence of predators and prey. Predator density can affect kill rates o. Per capita consumption of rate tends to decrease as predator density increases o. The effects of prey density on predator populations are often delayed. Hares that experience predator stress during pregnancy have fewer and smaller offspring. Population wide intergenerational inheritance of stress hormones. As prey develop to have stronger toxins, predators develop stronger resitances.
