Class Notes (807,242)
Canada (492,664)
Biology (2,096)
BIO152H5 (270)
Maria Arts (237)
Lecture 16

LECTURE 16 asdlkfjas.docx

6 Pages
Unlock Document

University of Toronto Mississauga
Maria Arts

LECTURE 1617 Behaviour and Evolution CH 51Outline Defining behavior Questions about behaviour innate behaviour and adaptation learningWhat is behaviourNarrow Definition Response to a stimulus Stimulus may be another animal or aspect of the envBroad definition decisions are made by organismsQuestions about behaviour WHAT Focuses on details of behaviour What is being observed attackretreatHOW Focuses on mechanisms of behaviour How organisms electrical system work to runProximate Causesneurologicalhormonalskeletalmuscular WHY Why an animal has evolved the behaviourUltimate Causesbased on evolutionary consequences adaptive behaviour increase fitnessBehavioral Traits Vary in Flexibility and Dependence on Learning behaviour falls in diff places on grid Somebehaviours like yawning innate behaviour and learning language need a lot of flexibility how flexible behaviour is fixed to variant andis how much learning involved in responseStudying Animal BehaviourWhat stimulus causes the kangaroo rat to express the behaviour Snake snapping jawrattling How are the animals nervous and muscular systems integrated to enable it to reactPhysiologicalmuscularanatomy Why has the escape jump evolved Survivalfitness Escape predationWhat stimuli trigger the grooming response and how are these stimuli detectedWhy has grooming evolved is there a fitness benefit for species to groom Genes and Behaviourphenotype is related to genes and environmentpge behavioral phenotypegenesenvironmentEnvironmental and Genetic VariationIdentical Twins same genetic makeup Slight differences in environment lead to variation in behaviours 80 twins have similarity when raised together 50 when apartInnate Behaviour completely genetic behaviour Not much variability Behave way programmed No learnFixed action patterns unchangeable behavioral sequences always 15 survivalfitness depends on innate behaviour ex kangaroos Fixed Action Pattern FAPhighly stereotypical innate behavioral pattern that has 3 characteristics triggered by releaserssign stimuli 1 there is almost no variation in how behaviors are preformed2 behaviors are species specific3 once the sequence of action begins it continues until completion no interruption
More Less

Related notes for BIO152H5

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.