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ANSC 1000 Lab Practical Study Guide

by: Hannah B.

ANSC 1000 Lab Practical Study Guide ANSC 1000

Marketplace > Auburn University > Animal Science and Zoology > ANSC 1000 > ANSC 1000 Lab Practical Study Guide
Hannah B.
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About this Document

Study guide for Intro to Animal Science lab practical in Dr. Huntington's class at Auburn University
Introduction to Animal Sciences
Dr. Carolyn Huntington
Study Guide
Huntington, auburn, Auburn University, Animal Science, Intro to Animal Science, Introduction to Animal Sciences, ANSC 1000, Beef Unit, Labs, Beef Labs, Beef Production, au, Swine, Sheep, Veterinary
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This 12 page Study Guide was uploaded by Hannah B. on Saturday February 27, 2016. The Study Guide belongs to ANSC 1000 at Auburn University taught by Dr. Carolyn Huntington in Spring 2016. Since its upload, it has received 180 views. For similar materials see Introduction to Animal Sciences in Animal Science and Zoology at Auburn University.

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Date Created: 02/27/16
ANSC 1000 Midterm BEEF British Breeds : Angus, Red Angus, Hereford Origin: British Isles Characteristics: 1. Mature and fatten at lighter market weights (1000-1150lb) 2. Grow slower and have smaller mature size 3. Less muscular 4. More fertile 5. Less calving Difficulty 6. Live and reproduce longer Used as maternal breeds in crossbreeding programs Angus Color: Black Polled (some scurs) Scurs: small growths of hornlike tissue attached to the skin of polled or dehorned animals Mature Size: 1150-1250lb Origin: Scotland Most registered breed Red Angus Color: Red Polled Mature Size: 1100lb Origin: USA Characteristics: Same as Angus but red Hereford Color: Red body, white extremities Both horned and polled Mature size: 1150lb Origin: England Continental Exotic: Charolais, Simmental, Limousin, Gelbvieh Origin: Continental Europe Characteristics: 1. Larger mature size (1200-1400lb) 2. Later-maturing 3. Heavier-muscled; higher yielding carcasses 4. Less fertile 5. Increased calving problems 6. Less marbling —> lower quality grade Normally used as sire breeds in crossbreeding Charolais Color: shades of white Both horned and polled Mature size: 1550lb Origin: France One of the first ‘exotic’ breeds introduced to the US Simmental Color: Black, yellow to red and white Predominantly horned, some polled Mature size: 1500lb Origin: Switzerland Limousin Color: Golden red to light yellow Both horned and polled Mature Size: 1300lb Origin: France Gelbvieh Color: black; traditionally yellow to golden red Both horned and polled Mature size: 1300lb Origin: Austria and Bavarian region of Western Germany Brahman and Crosses: Brahman, Santa Gertrudis, Brangus Desirable Characteristics: 1. Heat tolerance (sweat glands) 2. Parasite tolerance 3. Crosses with British/Exotics produce high heterosis Undesirable Characteristics: 1. Nervous disposition 2. Pendulous sheath 3. Meat is tough dark cutters: agitated during slaughter more connective tissue in the muscle 4. Not adaptable to cold climates Brahman Color: White & gray predominant but various colors Horned Origin: India Santa Gertrudis Color: red Both horned and polled Origin: King Ranch in Texas 5/8 Shorthorn and 3/8 Brahman Mature size: 1450lb First beef breed from the US Brangus Color: Black Polled (Some horned) Origin: USA 5/8 Angus and 3/8 Brahman Mature Size: 1300lb Judging Market Steers (and Heifers) 1. Desirable Market Weight (1100-1250lb) 2. Muscling (amount, thickness, and uniformity of thickness) 3. Trimness (lack of excess fat, yield grade) 4. Volume and capacity (width, length, depth) 5. Skeletal design (shoulder, top, hip) 6. Soundness and movement Judging Breeding Stock (Bulls and Heifers) 1. Size (frame size and length of body) 2. Volume and capacity (spring-of-rib, depth, broodiness) 3. Skeletal design (straight lines, shoulder, top, hip) 4. Soundness and movement 5. Reproductive soundness (testicular/udder development) Identification visual id pitfalls: human recording errors and time delay electronic id (left ear) coordinates source id, animal movement & pathogen tracking (BSE/FMD) market pays premium for traceability allows backtracking for quality concerns evacuation and relocation (natural disasters) records performance data for herd automatically tattoo (herd number inside ear in case tags rip out) branding (freeze brand or hot brand to substantiate ownership) Beef Feet and Leg Structure SWINE Yorkshire (Maternal Breed) Color: White (other colored hair merits disqualification) Ears: erect Origin: England Desirable Traits: maternal traits (farrow large litters, excellent mothering and milking ability) long-bodied growth rates aggressiveness (libido) of boars Undesirable Traits: carcass characteristics (excessive fat & light muscling) less hardy most recorded breed in US; primarily considered a maternal breed in crossbreeding Duroc (Sire Breed) Color: solid golden to deep brick red Ears: Drooped Origin: United States (New England Area) Desirable Traits: excellent growth rates and feed efficiencies vigorous Undesirable Traits: poor mothers — wean small litters problems with soundness boars lack libido enjoy widespread popularity; second most recorded breed in US Hampshire (Sire Breed) Color: black and white belt entirely encircling body Ears: erect Origin: Southern England Desirable Traits: excellent carcass traits (meaty, muscular) and soundness Undesirable Traits: boars lack libido (worst of all breeds) small litters growth rate third most recorded breed; research indicated use as a maternal breed promising Landrace (Maternal Breed) Color: white — black in hair coat merits disqualification Ears: large, long, drooped Origin: Denmark Desirable Traits: maternal characteristics, heavy milkers long-bodied soundness aggressiveness (libido) of boars Undesirable Traits: carcass lack overall meatiness and muscling fragile stress susceptible fourth most recorded breed in the US; several varieties present; average growth rates Spotted (Sire Breed) Color: black and white spotted with one dominating Ears: drooped Origin: United States Desirable Traits: good growth rate and feed efficiency scale, size, substance of bone, long-bodied hardy to variety of conditions aggressiveness (libido) of boars Undesirable Traits: maternal characteristics carcass characteristics Berkshire (Sire Breed) Color: black with six white points — feet, nose, tail Ears: erect Origin: England Desirable Traits: soundness meat quality (marbling, color, tenderness) Undesirable Traits: short-bodied poor maternal characteristics (mothering and milking ability; small litters) poor growth rate and feed efficiency popular in Japan due to meat quality; oldest lineage of all swine breeds Chester White (Maternal Breed) Color: white — other color hair merits disqualification Ears: drooped Origin: United States Desirable Traits: maternal characteristics (large litters, milk well, excellent mothers) aggressive boars muscular carcasses Undesirable Traits: short-bodied slow growing (ADG low) Poland China (Sire Breed) Color: black with white markings on face, legs, and tail Ears: drooped Origin: United States Desirable Traits: carcass characteristics; large loin Undesirable Traits: slow growth rate and below average feed efficiency short-bodied poor maternal characteristics popularity declining; oldest US developed breed Judging Market Hogs (Barrows and Gilts) 1. Desirable market weight (250-290lb) 2. Leanness (lack of excess fat, increased percent muscle) 3. Muscling 4. Growth Rate (ADG or days to 250lb) 5. Skeletal design and soundness (topline, hip, shoulder, feet, legs) Judging Breeding Stock (Boars and Gilts) 1. Skeletal design, soundness and movement 2. Reproductive soundness (underline) 3. Individual performance (growth, backfat) or EPD values 4. Parent performance (littler size) or EPD values Ear notching, tattoos, ear tags Swine Feet and Leg Structure SHEEP Sheep Breeds: the fine-wool breeds and the dual-purpose breeds, which are found mainly in the in the range-flock regions of the US produce about 10-14+ lb. wool per year also carpet wool breeds (very coarse) and hair-sheep breeds (generally not in US) most popular range flock breeds: Rambouillet, Columbia, Targhee most popular farm flock breeds: Suffolk, Dorset, Hampshire most sheep are seasonal breeders, normal breeding season ~August to early winter breeds that can be induced out of season: Rambouillet, Dorset, Polypay Fine-Wool Breeds: Rambouillet, Merinos, Debouillet hardy, gregarious, long-lived, well-suited to range management noted for their fine fleece, but have been generally lacking in mutton type modern breeding improved mutton conformation Rambouillet (most popular breed of sheep in the US) cream to white in color; wool on legs rams usually horned and large (300lb.) have a problem with closed faces strong points: strong flocking instinct, hardy, longevity weak points: poor mutton type, slow maturing, medium staple length (2-4 in.) Merino (American and Delaine, very fine and soft wool) cream color both polled and horned horns are present in both sexes and spiral around close to the head most popular breed in the world originated from Spain Medium-Wool: Suffolk, Dorset, Hampshire, Finnsheep, Polypay, Southdown, Cheviot bred for meat (lamb/mutton) and have good carcass conformation exception: finnsheep good fertility, poor carcass conformation generally have light fleeces, producing 5-8lb of wool/year wool is more coarse than fine-wool breeds, but much finer than long-wool breeds flocking instincts not as strong; tend to spread out over a pasture while grazing these breeds have been popular in the farm-flock regions of the United States Suffolk black head and legs free from wool largest sized breed in US (Rams 300-400lb) most popular purchased breed in US widely used as terminal sire in market lamb production form: excellent mutton type; high mutability carcass wool: medium, light fleece (4-8lb), black fibers ewes are prolific and give a lot of milk less longevity, especially in harsh environments Dorset white color, wool on legs horned or polled; horn curl resembles Rambouillet medium size (rams 200-250lb) form: moderately low-set; good mutton type wool: medium; not very dense; medium staple length; no black fibers heavy milk production highly fertile; more than one lamb crop per year Hampshire open face — usually rich brown to black; black legs some wool on head and legs large (Rams 250-350lb) widely used as terminal sire in market lamb production strong and weak points very similar to Suffolk; more hardy and produce more wool (6-10lb), but growth rates are less Finnsheep from Finland, 1968 white are most common, some black; no wool on face and legs small to medium size, medium wool, medium staple length (3-5in) poor carcass conformation fine-boned, very prolific (average 2-4 lambs each lambing) early puberty, early lambing Polypay developed by the US Sheep Experiment Station in 1970’s in Dubois, ID 4 breed cross, Targhee X Dorset & Rambouillet X Finnsheep medium-sized, white-faced, and prolific superior in lamb production and carcass quality selection pressure for out-of-season mating and prolificacy ewes are good mothers, produce lambs with good growth and carcass quality Southdown white; light brown face and legs; wool extends below eyes extremely compact — excellent carcass quality early market maturity excellent for hot-house lamb production (meat from a young lamb which has been entirely milk-fed; known for tenderness and delicate flavor) one of the oldest sheep breeds Cheviot clean, alert appearance — ‘decorative’ white, open face, erect ears, clean head and legs small, low-set, thick, well-proportioned very hardy and able to withstand extreme conditions Long-Wool Breeds: Lincoln, Romney bred chiefly for mutton largest of all sheep; slow-maturing fleece is open, coarse and very long have been useful for crossbreeding in the development of new breeds, but the purebreds are not very popular in the US very popular for hand-spinners Dual-Purpose Breeds: Columbia, Targhee, Corriedale called “dual-purpose” because they produce heavy fleeces with medium-to-long staple length, and they produce lambs having good carcass confirmation most descended from long-wool x fine-wool crosses and have medium wool better adapted to western ranges than either parent stock or any medium-wool breeds under range conditions: they produce better market lambs and heavier fleeces than the Rambouillet; more active and have superior herding tendencies compared with either the long-wool or medium-wool breeds Columbia developed from Lincoln x Rambouillet crosses US Sheep Experiment Station — Dubois, Idaho developed for range conditions one of the larger breeds in US; first to originate in US white; open face; wool on legs; medium wool; heavy fleece; medium-long staple length good carcass conformation gregarious; good mothers; hardy Targhee look similar to Columbia Lincoln-Rambouillet ewe mated to Rambouillet ram; some Corriedale breeding (Dubois) fine wool; tighter fleece than Columbia but staple a little shorter medium large hardy; good flocking instincts produce good market lambs Judging Market Lambs (Wethers and Ewes) 1. Desirable market weight (90-120lb) 2. Muscling (amount, thickness and uniformity of thickness) 3. Trimness (lack of excess fat, Yield Grade) 4. Volume and capacity (width, length, depth) 5. Skeletal design (shoulder, top, hip) 6. Soundness and movement (feet and legs — pasterns) Judging Breeding Stock (Rams and Ewes) 1. Size (frame size and length of body) 2. Volume and capacity (spring-of-rib, depth, broodiness) 3. Structural correctness (ie. skeletal design) 4. Muscling (design and amount) 5. Trimness (lack of excess fat) 6. Breed character and fleece quality 7. Soundness and movement 8. Reproductive soundness (testicular/udder development) Identification tattooing (mostly purebred flocks) plastic ear tags (like for beef cattle but smaller) — widely used metal ear tags — fairly common paint branding (temporary) ear notching (like for pigs) — not practical Sheep Age by Teeth


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