AAH2 Flashcards
What might we give livestock orally?
* Anthelmintics
* Antimicrobials
* Magnets (sit in the reticulum)
* Minerals
* Bicarb (treatment of metabolic acidosis)
A Simmental cow weighing 600 kg with a 2 month old calf at foot is rated at 15 DSE. She is one of a herd of 40 cows that are about to be mated to a Limousin bull. Which of the following answers is closest to the expected energy requirement for the cow and calf unit?
A. 60 MJ
B. 90 MJ
C. 120 MJ
D. 150 MJ
(35 kg calf birth weight approximately)
* Cows with 0-3 month calf at foot- 18 DSE if 500 kg.
1 DSE = 7.6 MJ/Day
C. 120 MJ
The relevant information in this question is that the cow and calf unit is set at 15 DSE at this stage of lactation. A DSE is defined as close to 8 MJ. 15 * 8 = 120 MJ.
** the breed and other information is not relevant for this question (although a European breed such as a Simmental with larger mature bodyweight will have a larger DSE rating than a smaller mature breed such as an Angus- but you can have an Angus with a higher DSE due to normal breed and individual variation
Originated in France, some now polled, black or organe, high dressing percentage due to good muscling, extensively used in cross breeding
A. Angus
B. Simmental
C. Belgian Blue
D. Limousin
D. Limousin
Which of the following answers is the best estimate of the expected bodyweight of a calf born to a Murry Grey cow and a heifer (first calving cow) in that order:
A. 75 kg and 50 kg
B. 40 kg and 30 kg
C. 30 kg and 40 kg
D. 40 kg and 15 kg
B. 40 kg and 30 kg
Most calf birthweights are between a low of 25 kg and a maximum of 55 kg. Heifers give birth to lighter birthweight calves at the higher end. It is good to have lighter calf bodyweights however extreme in low bodyweight can reduce calf survivability.
How many cows would a beef producer in Southern Australia be likely to join to an individual bull (presuming they were joining in single sire groups)?
A. 10
B. 20
C. 40.
D. 80
C. 40
To meet critical weights for mating on a particular farm a heifer must be 260 kg at 12 months of age- what is the average growth rate that the heifer must average from birth to achieve this body weight?
A. 0.3 kg/ day
B. 0.6 kg/ day
C. 0.9 kg/ day
D. 1.2 kg/day
B. 0.6 kg/day
In which of the following systems would you expect the calf to be heaviest at weaning?
A. Brahman sire and dam in North Queensland with calves weaned at 6 months old
B. Hereford female mated to Hereford male, calves weaned at 9 months
C. Hereford female mated to Simmental bull, calves weaned at 10 months.
D. Hereford Friesan cow mated to Limousin Bull, calves weaned at 10 months
B. Hereford female mated to Hereford male, calves weaned at 9 months??
Maximale heterosis is obtained by introducing maximal breeds in the cross breeding program and combined with dam milk production and later weaning.
The gestation period for a Brahman cow is
A. 115 days
B. 150 days
C. 280 days
d. 340 days
C. 280 days
Which of the following classes of products is the best product to treat 18 month old pregnant heifers with in February in Southern Australia for Ostertagia ostertagi (small brown stomach worm)?
A. Macrocyclic lactones
B. Levamisole/ Morantel
C. Benzimidazole
D. Organophosphates
A. MLs
If the cow in the previous question is grazing young, green feed in late Winter/Autumn with a 0-3 month old calf at foot on pasture that is 1,500 kgDM/Ha which of the following statements is most likely to be most accurate:
A. The cow will be losing weight (condition score)
B. The cow will be gaining weight
C. This data is inadequate to make any statement as to how much weight the cow may gain or lose
D. Grass growth will exceed cow requirements
A. the cow will be losing weight (condition score)– would need 2200 kg Dm/Ha for a lactating cow
- Merino- front wrinkle, no wool below the eyes, not wool all the way down to their feet (16 or 17 micron)
** Fine wool sheep, produce less wool in terms of volume and weight
- (Red) Angus
(1. Simmental, 3 Brangus, 4 Belgium Blue)
4
- 0%— just run bullocks
** Bullock is a castrated bul: 2-3 year old animal ready for market, meat–> Japan, Korea (500-700 kg +)
- Breeding flock with purchased replacement
Join them until they have 5-6 lambs and then all in that age group are sold
** Prime lamb- First teeth can’t erupt (11-15 months)– do not want teeth to show through, if they do would lose 20 -30% profit
* Could sell stock, agist if there is somewhere with grass but unlikely, supplementary feed (expensive), but crops can be cheap since so much is for sale if all cut at the same time
- More than 2 years– you’ve probably gotten rid of a few age groups (Lambs, yearling, 2 yo, up to 7 yo because they start losing their teeth)
4 or more
2
- Gross margin
2
3
4
2
Sheep would most likely be body condition scored where?
The short ribs
The most correct reason why sheep and wheat are used in combination on farms in the wheat-sheep zone of Australia is:
- Other cereal grains such as oats and triticale cannot be grown in this region
- Stock are able to eat the green wheat during summer as an added source of protein
- Stock may get limited grazing of the crop during late spring to aid wheat production
- Stock can graze the wheat stubble during summer
- Sheep can graze stubble in summer and potentially the crop in early growth stage in winter. Grazing during spring will reduce grain yield substantially. Stubbles are not green during summer in most seasons.
Herdwick
In a seasonal lambing Merino flock with ewes lambing over two oestrous cycles, how long after lambing commencement in the flock should weaning occur?
each oestrus cycle is approximatley 17 days–> two cycles is approximately 7 weeks–> weaning can then occur at approximately 6 weeks after this= 13 weeks
A prime lamb producer who sells lamb directly to the abattoir has asked your advice on timing reproduction on her property to best match feed availability. The SW Victoria property has peak pasture availability in October/ November. What month do you recommend she put rams in with her ewes?
February
Which procedures would generally not occur prior to weaning in a self replacing Merino flock?
tail docking and drenching (castration and vaccination would occur a few weeks after lambing is finished in most flocks)
Dorper, meat
A 45 kg Merino wether is kept as a pet in a backyard but the grass has run out. The diet the wether is eating is 70% oats and 30% lucerne chaff. What is the likely percentage of DM of these two ingredients and the requirements of the wether? How many kg of these combined ingredients will the wether need on a weekly basis?
hay and grain have approximately 90% DM. Most grains have approximately 10-12 MJ/kgDM (so about 10ish per kg as fed)– A DSE needs 7.5 MJ. Hence needs about 3/4 kg per day* 7 = a little over 5 kg per week.
Which feed is this likely to be?
Energy: 12 MJ/kg DM
Protein 32%
ADF: 20%
- Lucerne Hay
- Wheat
- Oats
- Lupins
- Lupins because of high protein levels
If the adult weight of some Friesian and Friesian cross heifers is approximately 600 kg, at what weight would you anticipate these heifers should be joined?
370 kg
If a Friesian heifer is being joined at 360 kg at what age should they be joined and what is the anticipated required average daily weight gain (kg) needed to meet this?
15 months old, 0.7 kg/day
If a Friesian heifer is being joined, which of the following bulls (or semen) is likely to result in the least dystocia?
- Belgian Blue
- Friesian
- Ayrshire
- Jersey
??
If you saw some 2-4 year old Poll Dorset Rams that are about to go out into the paddock to join some ewes and are in a condition score of 3.5. What bodyweight range would you anticipate them to have?
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How many piglets would you expect the average mature sow in an Australian intensive piggery to give birth to??
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How long would eggs take to hatch if a chicken was allowed to sit on her eggs?
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