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Week 15 Zoo notes

by: Hannah Kirby

Week 15 Zoo notes BIOL 1114, 001

Hannah Kirby
GPA 3.1

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About this Document

Notes from Week 15 lecture, not including case study
Intro to zoology
Class Notes
introductory, Zoology, Biology
25 ?




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This 2 page Class Notes was uploaded by Hannah Kirby on Saturday May 7, 2016. The Class Notes belongs to BIOL 1114, 001 at University of Oklahoma taught by Dr.Lee in Winter 2016. Since its upload, it has received 12 views. For similar materials see Intro to zoology in Biology at University of Oklahoma.


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Date Created: 05/07/16
Week 15 Zoo notes  Animal behavior  Physiology   Ecology Behavioral ecology­ foragingpredator avoidancemoevment territoriality sociality Reproduction:  Courtship  Sexual selection  Mating systems  Human application Courtship  What is it? o Displays o Dances o Rituals o Calls o Nest building o Food provisioning o Bower building (shaded structure to reside in) o Other things…   Why? o Increased survival o Increased reproduction o 3 functions:  Species identification (displays are species­specific)  Stimulation of hormonal changes in participants (e.g., initiating ovulation  in females)  Mate quality assessment (sexual selection) Natural selection­ differential reproduction of organisms based on inherited traits Sexual selection can lead to extreme sexual dimorphism, a situation in which the two sexes look  very different o Body size o Ornamentation o Color  Intersexual selection:  Females­ greater reproductive investment   Motivated by fitness cues  Males­ selected traits that may represent fitness directly or indirectly  Leks­ gatherings where females pick the male that impresses them the most Intrasexual selection: Male­male competition is a common type of intrasexual selection Differentiation between males­ density/size of horns, antlers Mating systems:  External vs internal fertilization   Polygamy vs monogamy  Affects parental core Monogamy­ neither the male nor the female have another sexual partner Extra­pair relationships = “cheating”  Polygamy­ either males or females have multiple partners Paternity confidence­ the amount of care provided to young also differs among animal species  Monogamy­ high confidence  Polygamy­ low confidence  Animals increase their confidence in paternity in several ways  Guarding a mate after copulation  Inserting a plug that prevents other sperm from entering What about humans? Males attempt to draw in females Human reproductive choices may reflect natural selection  Men prefer more sexual partners throughout life than females  Men are also more likely to make sexual decisions without much information about the  female  Male reproductive involvement ends after copulation  Female involvement can last for years


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