Ruminant digestion pt 3 Flashcards
What type of fungi are important for ruminant GI system?
Anaerobic, zoosporic fungi
What type of feed are fungi the most important in?
Animals fed low quality feedstuffs. No role in grain-fed animals
What are the fermentative activities of fungi?
- Fiber
- Starch
- Sugars
- Protein
What are the fermentation products?
- Acetate
- Formic
- Lactic
- Butyric acids
- Hydrogen
- NO propionic
What type of protozoa’s are found in the rumen and which is important?
- Ciliates: important
- Flagellates: not important
What type of protozoa digests CHO?
Entodiniomorphs
What are the fermnetation products of ciliates?
- Acetic
- Propionic
- Butyric
- Lactic
- H2
- CO2
What is the role of ciliated protozoa?
Somewhat controversial
- Beneficial in grain fed
- Eliminating protozoa may benefit animals fed low quality forage diets
What are the types of ruminal ciliates?
- Holotrichs
- Entodiniomorphs
What energy product is needed in order for fermentation to happen?
NADH
What is the end product of fermentation?
1-4 ATP and organic products. No O2 needed
What are the consequences of energy limitation of fermentation?
- Need rapid throughput
- End products accumulate
- Wide range of substrates
What are the two types of mastication?
Ingestive and ruminative
What type of mastication is slow and complete?
Ruminative
What is the function of mastication?
- Break large feed particles
- Stimuli to increase saliva
- Stimuli to increase rate and amplitude of ruminal contractions
