SBCC ZOOL 140 - Lect 03 - strategies & evolution (20 pages)

Previewing pages 1, 2, 19, 20 of 20 page document View the full content.
View Full Document

Lect 03 - strategies & evolution



Previewing pages 1, 2, 19, 20 of actual document.

View the full content.
View Full Document
View Full Document

Lect 03 - strategies & evolution

35 views


Pages:
20
School:
Santa Barbara City College
Course:
Zool 140 - Animal Behavior
Unformatted text preview:

Methods Observational behaviors are observed and recorded without any manipulation of the animal or the environment e g Chimpanzees Methods Experimental Scientists manipulate or change a variable to see how it affects the behavior of an animal requires the use of a control group e g Digger Wasps Control Experimental Test 1 Test 2 Methods Comparative Scientists examine similarities and differences between related species or groups of animals to evaluate how and when a behavior evolved e g Burrowing behavior in mice Strategies Tactics Strategy plan of action in which you define your goals and decide the means by which you ll meet those goals Tactic an action or sequence of actions you use to achieve your strategical goals Example goal finding and capturing food Strategy sit and wait method Tactics a find a hiding place b sit very still and don t make any noise c when something gets close use amazing speed and agility to reach out and grab it Strategies Tactics 1 Single optimum strategy everyone in group uses same strategy e g British Red Squirrels Strategies Tactics 2 Alternative competing strategies multiple strategies found within a single group E g Male mating behavior in Blue gill Sunfish Parental male Sneaky Male Satellite Male Strategies Tactics A Fixed strategy no choice e g Side blotched lizards Orange biggest most aggressive large territories mates with as many females as possible Blue medium forms pair bond with one female guards her from other males Yellow smallest look like females sneaks on to orange male s territory Orange beats blue blue beats yellow yellow beats orange Strategies Tactics B Plastic strategy choice E g Hamadryas baboons Fight or don t fight Decision based on prior ownership Male A with Female Z Darn I guess she belongs to him Male B Adopts don t fight strategy Darn missed my chance with that one Male A Also adopts don t fight strategy Male B with Female X Male B She s mine She s mine Female Y Male A Male B B Male Both adopt fight strategy How do we study animal behavior scientifically from proximate and ultimate perspectives via observational experimental and comparative methods as a set of strategies and tactics single optimum strategy alternative competing strategy fixed plastic Biological Evolution A change in the genetic make up of a population over generations The accumulation of many genetic changes results eventually in visible differences changes in phenotypes evolution is a natural observable phenomenon our understanding based on scientific evidence collected and tested following the scientific method Evidence for evolution 1 Fossil record physical evidence of organisms that lived in the past E g Origin of Tetrapods based on Fossil Record Evidence for evolution 1 Fossil record physical evidence of organisms that lived in the past 2 Homologies similarity of structures of different organisms as a result of their evolution from a common ancestor Ancestor Descendent types of homologies A Anatomical B Embryological developmental C Molecular Evidence for evolution 1 Fossil record physical evidence of organisms that lived in the past 2 Homologies similarity of structures of different organisms as a result of their evolution from a common ancestor phylogeny evolutionary history of a lineage homologies Evidence for evolution 1 Fossil record physical evidence of organisms that lived in the past 2 Homologies similarity of structures of different organisms as a result of their evolution from a common ancestor 3 Empirical data experiments and observations E g Influenza virus E g Ground finches E g Artificial selection


View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Lect 03 - strategies & evolution and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Lect 03 - strategies & evolution and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?