14. Measuring Feed Intake - Department of Animal Sciences ...

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Fecal analysis:Pros• Minimal disturbance of animals• Can be used with free-ranging animalsCons• Accuracy• Under-estimates digestible component ofdiet & over-estimates indigestiblecomponents
GIT contents:Method• Shoot/kill animal (humanely)• Collect samples from rumen or gutPros• Animals may be getting shot anywayCons• Is only an estimate of what it ate last• No scope for repeating measurements• Partial digestion will affect results
Page 1 and 2:
Measuring feed intakeDr Adegbola T.
Page 3 and 4:
Determining intake in confinedanima
Page 5 and 6:
Zero grazing criteria• Representa
Page 7 and 8:
Calan gatesBruno’s website
Page 9 and 10: Calan gates at the BRU
Page 11 and 12: Hoko feeder
Page 13 and 14: Determining intake fromartificial p
Page 15: Quantifying intake from bite sizeBi
Page 18 and 19: Turves:Method• Sow trays or cut f
Page 20 and 21: Measuring intake at pasture
Page 22 and 23: Herbage mass measurements:Method•
Page 24 and 25: Herbage measurements:Pros• No ani
Page 26 and 27: Short-term BW measurements:Pros•
Page 28 and 29: Vibracorders• Procedure-Works lik
Page 30 and 31: Watch what you eat!!!!Python regret
Page 32 and 33: Total feces collection:Procedure•
Page 35 and 36: MethodMarkers:• Avoids the need f
Page 37 and 38: Internal markers• E.g lignin, AIA
Page 39 and 40: External Markers - chromic oxide:Pr
Page 41 and 42: Markers - Alkanes• Main component
Page 43 and 44: Markers - Alkanes:• Straight chai
Page 45 and 46: Measuring intake with alkanes:• D
Page 47 and 48: Alkane analysis• Alkanes in a sam
Page 49 and 50: Fecal index methods• Based on inv
Page 51 and 52: Accurate representative sampling de
Page 53 and 54: Diet selection:Factors affecting di
Page 55 and 56: Snip samples:Method• Cut or pick
Page 57 and 58: N-alkane markers:Principle-Alkane p
Page 59: Fecal analysis:Method• Collect fe
Page 63 and 64: Conclusion:There is no right answer
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