ANIMAL WELFARE (Feeding Behaviour) Flashcards
Feeding behaviour:
-any action that is directed toward the procurement of nutrients
-distinct appetitive and consummatory phase
Feeding behaviour model (sterotypies):
- Causal factors leads to
- Motivation leads to
- Appetitive behaviour (if don’t eat, then increases motivation)
- Consummatory behaviour (decrease motivation and causal factors)
Optimality:
-based on energy (in the past)
-multifactorial control (past and now)
-overall fitness (now)
Based on energy (optimality):
-mechanisms for the optimal allocation of time and energy expenditures
Multifactorial control (optimality):
-minimise the total discomfort generated by several signals from various body systems
Overall fitness (optimality):
-a function of its contribution to survival, growth, and reproduction over the organism’s lifetime
Many disease or painful procedures RESULT IN:
-alterations of feeding and/or ruminating patterns
Various health issues (obesity, rumen acidosis) CAUSED BY:
-animal’s inability to develop accurate associations between the food content in its diet and their post-ingestive consequences
Causal factors:
-interpretations of external changes and internal states of the body that serve as inputs to the decision making centre
External factors:
-surroundings
-food characteristics
Internal factors:
-previous experiences
-body signals
Previous experiences:
-initiate feeding
-efficiency of finding food
-rate of ingestion
*decrease: weird smell, or the less dominant animal will wait for the others
*increase behaviours when the feed truck goes by the pen
Body signals:
-visual, taste and olfactory input
-hormones (leptin, ghrelin, amylin)
-gastrointestinal receptors
-liver receptors
Gastrointestinal receptors (body signals):
-mechanosensitivity tension and motility
Liver receptors (body signals):
-glucose
-nitrogenous compounds
-osmolality
