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ACBS 102R: Intro to Animal Science - Study Guide


ACBS 102R: Intro to Animal Science - Study Guide ACBS 102R

Marketplace > University of Arizona > Science > ACBS 102R > ACBS 102R Intro to Animal Science Study Guide
Intro to Animal Science
John Marchello

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Intro to Animal Science
John Marchello
Study Guide
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This 2 page Study Guide was uploaded by an elite notetaker on Sunday October 19, 2014. The Study Guide belongs to ACBS 102R at University of Arizona taught by John Marchello in Fall. Since its upload, it has received 129 views. For similar materials see Intro to Animal Science in Science at University of Arizona.


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Date Created: 10/19/14
ACBS 102 Exam 2 Studv Guide Fall 2014 Chapter 4 Animal Behavior Two views have been advancedAnimals learn everything they do Animals know what to do instinctively Both are incorrect why Behavior is the result of conditioning based on experience of the animalsTwo types of conditioning Classical amp Operant Know the difference Cows ewes does and mares lick their young at birthLicking helps develop a strong bond between mother and offspring Sows do not lick their young Chapter 8 Growth and Development 0 Growth increase in body weight until mature size is attained increase cell size and number Prenatal livestock 3 phases Sex cells Embryo Fetus Skeletal GrowthMaturity proceeds from distal to proximal in limbs Maturity proceeds from posterior to anterior Muscle system Skeletal Smooth and Cardiac Endocrine Growth and development relies quite heavily on this system Endocrine glands Ductless Secrete product hormones into blood Heifers deposit fat earlier than steersbulls Bulls are leaner Swine are differentBarrows are fatter than gilts or boars SheepNo differences due to gender Chapter 9 Introduction to Nutrition Nutrition The body s needs and mechanisms for digestion transporting and metabolizing nutrients Feed cost range from 4575 of the cost of production Feed Cost Ranges 6080 for Hogs 55 for Layers 65 for Boilers and Turkeys 5060 for Dairy Cattle 70 for Feedlot Cattle 50 for Lamb Feeding Nutrient A substance in the diet that supports the normal functions of the body Six types of nutrients Water Carbohydrates Proteins Fats Vitamins Minerals Digestibility A measure of the degree to which a feedstuff can be chemically simplified and absorbed by the digestive system of the body DIGESTIBILE ENERGY gross energy minus fecal loss energy equals digestible energy METABOLIZABLE ENERGY digestible energy minus energy lost in gas and urine equals Metabolizable energy NET ENERGY Metabolizable energy minus heat loss of energy net energy Chapter 10 Converting feed to food Cattle daily gain 24 pounds feed per pound of gain 685lbs Swine daily gain 16 pounds feed per pound of gain 35 lbs Lamb daily gain 8 pounds feed per pound of gain 8lbs Chicken daily gain 1 pounds feed per pound of gain 19 About 80 of the total feed used comes from roughages Generally these roughages cannot be used by humans directly for food Food products from ruminants provide in the diets of the US population The following 45 of the protein 32 of the fat 50 of the phosphorus 77 of the calcium More than 100 drugs used by humans for medical purposes are made from animal byproducts Chapter 11 Environment 0 Conditions can greatly in uence an animal s production due to temperature humidity wind light elevation feed water etc Livestock perform is due to acclimation or genetic adaptation How do animals adjust to the environment hormones All livestock are homeotherms Animals must maintain constant body temperature Thermal neutral zone Range of ambient temperature when rate and efficiency of performance is maximized and health is optimal Lower critical temperature Maximal lower limit of thermal neutral zone Upper critical temperature Animals are heat stressed above the zone Temperature most common factor affecting productivity When basal metabolic rate is increased by a stress the energy requirement is met by reducing metabolizable energy available for production Chapter 15 Sheep Industry US sheep breeds provide a diverse range of performance for milk wool carcass characteristics reproduction and growth rate Two Management 1 Range FlocksLambs fed in feed lots in CA TX CO sheep Summer in the high country and winter in desert areas 2 Farm FlocksLess than 100 head per farm Profit Depends On High Conception Rates 95 High Lambing Percentages 175 Low Lamb Mortality 10 or less Strong Marketing Program High Seasonal BreedersBased on photo period Photoperiodism and Temperature Accelerated Lambing Programthree lamb crops in two years using synchronization of estrus Sheep Management Problems PredatorsCoyote biggest problem Stray DogsExternal Parasite stomach worms Intestinal worms roundworms Tape worm Lungworms Nose bots PROBLEMS for the industryRespiratory Disease EnterotoxaemiaAvailability of trained personnel 1520 Death Loss Inherited Abnormalities Cryptorchidism Dwarfism Rectal Prolapsed Carlipyge Castrating and Docking 34 days after lambing Elastration method is used more extensively to castrate and doc Also a surgical method can be used


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