BIO205H5 Lecture : Lecture #2 Notes
Document Summary
Stimulus may be another animal or some aspect of the environment. resources have to be divided between survival and reproduction www. notesolution. com. benefits: net gain in energy, increase in reproduction success. costs: injury, shortage of shelter, parasites, capture by predator. mates a territory in a good location means you are going to do well humming birds defend territories with a constant number of flowers ( optimal) Costs: time, energy, risk of injury increase with territory size. Benefits www. notesolution. com access to food, nesting sites, refuges, mates. Optimal territory size = maximum number of benefits cost. Slide 1: predation risk in guppy school predators attack large schools more frequently small groups are easier targets therefore should stay in large groups. Slide 4: kin selection: is the natural selection that acts through benefits to relatives. Slide 5: female squirrels call out more than males- call frequency increases with relatedness.
