MOD 3 - COURSE 6 - SOURCES OF SUFFERING AND DISTRESS PT 1 Flashcards
what are potential sorces of suffering and distress
- sickness
- aggresive cage mates
- overcrowding
- sudden / loud noises
-uncessful adaptation to research environemtn - behavioural needs = not met
common causes of stress
- housing
- socialization
- handling an dtraining
- transport
- fasting
what act covers appropriate housing for animals
- ASPA 86 - COP - standard of care for accomidation
whats the micro environment
- immediate surroundings
what could be distressing about micro-environemnt
- space
- illumination
- noise
- temperature
- humidity
what features determine animal space needs
- age. sex, number to be cohouse, duration, intended use of animals, special needs, body weight, SA
whats the minimum space required
- enough to express natural postures, make adjustments, turn arouns, access to food and water, rest away form urine and poo
why is degree of structure of environemtn important?
can cause - aggression i.e. if too much empty space in mice
how does light effect aniamls
- physiology, morphology and behaviour
what stressors are ther involving light
- innapropriate:
- photoperiods, intensity, spectral quality of light
- as there needs to be adequate light for inspections
how does light regulate physiology
- provide adequate visions - regulated neuroendocrine regulation of diurnal and circadian cycles
how can too low or high intesity effect rodents
- cause retinal damage
- affect oestrous cycle in female rodents
how can light stress be managed
- provide aniaml a way of controlling light exposure - nesting/ tunnleing
how does noise effect aniamls
- louder than 85db - can cause
- eosinopenia
- increased adrenal weight
- reduced infertility
- increased blood pressure
sounds which are inaudible to huamsn can cause stress i.e. ultrasounds - mice hear this
whats the thermoneutral zone
- ambient temp range - which thermoregulation occurs wihtout need to increase metabolic heat production
- bound by upper and lower critical temps
how do aniamsl maintain body temp
- alter physiology i.e. metabolsims
- behaviourally - activity level
what is the rodent thermoneutral zone?
- 26’C-34’C
- during activity period - lower than this - but above for resting
what is the general rule for temp
- aniaml temp = set slightly below the TNZ but provided nesting/ warmig materials - avoid heat stress
- particullary important to avoid cold stress in newboorns - as LCT = higher than adults
what can result from wide fluctuations of humidity
- result in behavioural, physiologic and morphic changes
what is teh control percentage
30-70%
when is the control of humidity more important
- when aniamls - in primary enclosure - which conditions differs greately form macroenvironemtn i.e. static filter top cages
