ANSC 3040 final EXAM QUESTIONS WITH ANSWERS

ANSC 3040 final EXAM QUESTIONS WITH
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ANSWERS
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What is the close up period? (Cows) - CORRECT ANSWERS
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✔✔last 3 weeks before calving
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- moved to maternity pens
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why do reproductive management strategies change
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according to categories? - CORRECT ANSWERS ✔✔the|\ |\ |\ |\ |\ |\ |\



reproductive scenarios are different to fit the needs of the |\ |\ |\ |\ |\ |\ |\ |\ |\



animals
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- heifers = still growing
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lactating cow = in process of lactation
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define puberty within dairy cows - CORRECT ANSWERS
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✔✔first ovulation followed by a REGULAR luteal phase
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most important factor to puberty - CORRECT ANSWERS
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✔✔body weight |\ |\




- heavier = faster
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,why is over feeding an issue with dairy heifers? -
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CORRECT ANSWERS ✔✔Overfeeding can cause |\ |\ |\ |\ |\



accumulation of fat in the mammary glands |\ |\ |\ |\ |\ |\ |\




- causes less mammary tissue to be developed
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- less functional tissue
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Can have health issues
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- mobilize fatty tissues after calving = predispose to
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metabolic and immune diseases |\ |\ |\




how can under feeding be an issue for dairy heifers? -
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CORRECT ANSWERS ✔✔reach puberty and calve later =
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more costs |\ |\




less milk during first lactation
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higher risk for dystocia and limited capacity to compete
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for food among larger heifers
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what 3 factors impact puberty age - CORRECT ANSWERS
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✔✔genetics, breed and weight |\ |\ |\

,when should dairy heifers reach puberty and when should
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they become pregnant and calve? (ideal) - CORRECT
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ANSWERS ✔✔puberty = 9-10moa |\ |\ |\ |\




pregnant = 13-15moa |\ |\ |\




calving = 22-24moa |\ |\




why is having bulls present within a dairy farm for
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reproduction not recommended? - CORRECT ANSWERS |\ |\ |\ |\ |\ |\



✔✔1. expensive - another mouth to feed
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2. increased probability of accidents
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3. not able to select for genetic traits we want (can do
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with AI) |\




what are the 3 AI protocols for dairy cows? - CORRECT
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ANSWERS ✔✔1. detection of spontaneous estrus |\ |\ |\ |\ |\ |\




2. detection of spontaneous and induced estrus (PGF2
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alpha injections every 14d to induce estrus)
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3. times AI programs
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, most important estrus behavior - CORRECT ANSWERS
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✔✔standing to be mounted |\ |\ |\




estrus characterizations (cow) - CORRECT ANSWERS ✔✔1.
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vocalization
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2. mucous vaginal discharge becomes clear
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3. mounting attempts to other heifers
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4. standing to be mounted
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is it easier to detect estrus in dairy cows or other cows? -
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CORRECT ANSWERS ✔✔dairy cows - going to the barn at |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



least twice a day |\ |\ |\ |\




- able to see more of them
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- more chances of seeing expression of estrus behavior
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how does tailk chalk work for estrus detection? -
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CORRECT ANSWERS ✔✔paint the back of a heifer |\ |\ |\ |\ |\ |\ |\




- if accepting to be mounted paint spreads
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how do activity monitors work for estrus detection? -
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CORRECT ANSWERS ✔✔place on ankles when in breeding |\ |\ |\ |\ |\ |\ |\ |\



pen |\