MCQ 2 Flashcards
What % weight will a finisher pig gain?
62.7% of its overall weight
How long is the finishing phase of pig production?
25-26 weeks
What is the weight of the pig at the start of the finishing phase?
38.7kg
What is the average weight of a pig at slaughter?
110kg
What is the target ADG of a finisher pig?
940-950kg
What is the FCR of a finisher pig?
100kg = 2.8:1
2.6:1 on average
2.4:1 is the target
What is the kill out % of a finisher pig?
76.4%
What is the average daily feed intake of a finisher pig?
1695 g
What is the average feed price per tonne for a finisher feed?
€300/tonne
What is the composition of fat?
88% lipid
10% water
2% protein
What is the composition of the lean part of the pig?
20-22% protein
74% water
4% lipid
What requires more energy, one kg of lean or 1kg of fat gain?
1kg of fat gain require 48 MJ ME
1kg of lean requires 11.86 MJ ME
What is the base % lean meat and what +/- do factories pay?
54% lean meat
+/- 2.5 c per %
What % does feed account in pig production?
- 70-75% of whole pig production
- Finisher stage accounts for 60% of the total feed costs
What is the main factor determining the growth potential of a finisher pig?
Breed and genetic potential
Whats the best feeding practice to minimise wastage?
Restrict feeding by phase feeding
Whats the growth potential of a castrate pig?
15% below a complete boar
What is the most crucial amino acid in pig production?
Lysine
What is the relationship with feed curves and protein deposition?
- You must find an optimum feeding curve to maximise the protein deposition of the particular pig breed on the farm
- Avoid overfeeding
A typical pig finisher diet 35-95kg should contain which level of DE and Lysine?
- 13.8-14.0 DE
- 1% Lysine
What happens if the pig is fed excess protein?
- Energy is used to excrete the excess protein so increase in daily gain and reduce back fat thickness
If excess digestible energy is fed to figs in he grower finisher stage, what will happen?
Increase in daily gain and increase back fat thickness
What level of nitrogen is utilised and excreted by a pig?
1/3 Nitrogen retained and 2/3 excreted
What is the typical lysine ratio for a finisher pig?
- 25:1
- 25g of lysine per 1kg growth rate
A 70kg pig gaining 800g/day would have a lysine requirement of?
20g/day (0.8 x 25)
If this pig is eating 2kg/day of feed, what concentration of lysine is put in the diet?
10g/kg (20/2)
Whta happens the lysine requirement as a pig gets older?
It decreases
Explain the phase feeding approach?
Phase feed drop diet specification every 15 kg gain this minimises wastage
What is the common feeding method used in Ireland?
Split diet approach
Maintenance accounts for how much of total intake?
40%
What factors determine feed formulation formulation on pig farms?
- Genetics
- Health
- Environment
- Management
- Economics
In high input systems, how many diet specifications are for a finisher pig?
- 3 options
- Gradually reducing the DE and Lysine % in the diet
How many times is a pig fed and what proportion of feed is given at certain times?
- Fed 3-4 times
- 3/4 of feed is given from 7am to 2pm
What happens sick pigs?
Sent to hospital pens until finishing
What is the optimum feed:water ratio?
2:1
What is an anemometer?
Measures draughts
How is ammonia measured in a piggery?
Drager Tubes
What is the optimum ammonia levels in the pig unit?
25 pp/mil
What non nutritional factor can effect growth?
Stress and handling
What is the temperature of the finishing house?
21 degreees
If temp too high, air movement from slates increases level of vices (biting)
What is the EU guideline stocking rate?
100kg pig- 0.76 m sq per pig
110kg pig- 0.86 m sq per pig
What is the optimum number of pigs per pen?
16-18
What is the minimum water delivery rate for finisher pigs?
700 ml/min nipple drinkers
1 per 10 pigs
What is the golden box rate?
77-87 kg
What is the formula for cold carcass weight?
Hot carcass x 0.98 = cold carcass weight
What are the 2 parameters to measure % lean meat?
Hennessey grading probe
Fat o meter
Formula for the fat-o-meter
Estimated lean % = 50.16 - 0.772 x (probe fat in mm) + 0.324 x (muscle depth in mm)
Which of the following will have the greatest effect on meat tenderness?
Feeding ad lib from 30 days onwards
Name the 3 componetns of pig meat quality?
- Colour
- Drip
- Eating Quality (% lean)
What is PSE?
- Pale Soft Exudate caused by halothane positive gene (Pietrain)
- Rapid drop in pH
What is DFD?
Dark Firm and Dry due to no drop in pH after slaughter
Main cause of boar taint?
Skatole and Androsterone