midterm? Flashcards
1 nutrient for animals
air
features of enviro that influences animal biology
air, sanitation/hygiene, nutrition, space and social setting, equipment, noise
4 movements that you need to know when designing a facility *
animal, people, nutritional, manure movement
stressors
climatic, enviro, nutritional, pathological
heat balance equation
maintaining constant body temp depends on M+G=L
Heat balance equation meaning of M
M = metabolic heat production from body
heat balance equation G
heat Gained from enviro - radiation and convection
heat balance equation L
heat Lost to environment - radiation, evaporation, conduction, convection
convection heating types
free convection - hot air rises
forced convection - pushing air
humidity impact on environment
impacts evaporation, higher humidity impacts bacteria
animal thermal insulation layers
body core, body shell, cover layer, boundary layer
animal body core
visceral organs, can change with nutrition, increased energy density of food
animal body shell
muscles, blood vessels, fat and skin
animal cover layer
hair or feathers - pelage or plumage
animal boundary layer
air - ventilation dependent
how much of thermoregulation is behavioural
80%
elixirs of life
air, water and light
light and water consumption relationship
more light = more water
functions of ventilation
- uniformly distribute fresh air without drafts
- maintain species specific building temp
- exhaust respired moisture
- remove all air contaminants
ventilation related problems
air quality
temp fluctuations
micro-climates
inlet management
negative v positive fan ventilation
positive - air in, negative pushing out
dew point
when internal is lower than air temp - 60% humidity - barn sweats
management for air pollutants
ventilation/climate
elevated floors - not slats
animal/human activity
protein retention in diets according to vern
18-40%