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Animal Science Week 1

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by: Samantha Wavrin

Animal Science Week 1 ANS 121

Samantha Wavrin

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About this Document

These notes cover all of the information that we went over in the first two classes.
Intro to Animal Science
Professor James Hermes
Class Notes
Science, Animal Science
25 ?




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"Loved these! I'm a horrible notetaker so I'll be your #1 fan in this class"
Finn Rempel

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This 3 page Class Notes was uploaded by Samantha Wavrin on Tuesday January 19, 2016. The Class Notes belongs to ANS 121 at Oregon State University taught by Professor James Hermes in Winter 2016. Since its upload, it has received 104 views. For similar materials see Intro to Animal Science in Animal Science and Zoology at Oregon State University.


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Loved these! I'm a horrible notetaker so I'll be your #1 fan in this class

-Finn Rempel


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Date Created: 01/19/16
Samantha Wavrin Lecture 1: Biology – the study of life at a cellular level Zoology – The science of animal life, includes invertebrates, taxonomy, ecology, anatomy and evolution Animal Science – The study of 2 classes of mammals  Companion animals  Livestock and poultry Animal Science is the study of the entire animal, which includes: immunology, nutrition, genetics, bacteriology, biochemistry and physiology Domestication  Dogs were first domesticated in approximately 14,000 BC  Livestock were domesticated from 9,000 to 200 BC  Why were animals domesticated? For food, clothing, tools, ect Lecture 2 Domestic Animal Populations, in millions Chickens – 17,859 Cattle – 1,357 Sheep – 1,089 Ducks - 1094 Swine - 930 Goats - 840 Turkey - 473 Buffalo - 178 Horses - 59  Approximately one sixth of our calories come from animal products  Approximately one third of our protein comes from animal products  Animals consume a third of the grain supply worldwide, and about half of all organic matter containing cellulose  Cellulose is essentially the structural part of plants  Conversion – how animals convert grain and cellulose to body mass, milk, eggs  Feed efficiency – weight of feed in/product out or feed/gain Efficiency: Poultry and swine (monogastrics) are most efficient based on - Total feed consumption/total human food produced Cattle, sheep, and goats (ruminants) are most efficient based on – Total human usable food/total human food Improvements in efficiency: 1862 Morril Act –Land Grant Colleges  This act provides money to buy land to have schools where you can study agriculture. OSU is the land grant college for Oregon 1887 Hatch Act – Agriculture Experiment Stations at Land Grant Colleges  Provided federal money to the university for Agriculture research, created a way to introduce new information to classrooms 1914 Smith Lever – Extension Service  Provides information to the producers  Current food supply is adequate, distribution is poor, which causes approximately 800 million people to eat inadequate diets  Methods that increase efficiency include: hormones, antibiotics, density  Grasslands account for 30% of global land base  For every 100 units of human food produced from crops, 37% is byproducts, not edible for humans  The human population is expected to increase by 33%


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