8-Swine Housing and Ventilation Management

Question 1

Purposes of Ventilation (6)

Answer 1

• Control temperature and humidity
• Control dust and build-up of harmful gases
• Remove bacteria, viruses, spores and chemicals
• Provide adequate oxygen for respiration
• Provide optimal animal environment and worker comfort
• Extend building life

Question 2

Pigs are ____, which are able to control their body temperature providing that their environment does not exceed extremes of temperature or relative humidity (the amount of moisture present in the air). The pigs release their body heat through ____, ____, ____

Answer 2

homeotherms

radiation, convection and conduction.

Question 3

When the pig body temperature is higher
than the surrounding temperature, it
releases body heat through a process
called

Answer 3

radiation.

Question 4

When a pig is in contact with a cold
surface like the floor, heat is drowned in
the pig to the floor. This process is called

Answer 4

conduction.

Question 5

When cool air moves around the pig, heat
is taken away. This process is called

Answer 5

convection.

Question 6

The normal body temperature of the pig is
around 39.7°C. When the temperature exceeds ____ its normal body temperature, the pig will suffer hyperthermia or heat stress.

Answer 6

4°C above

Question 7

The pig could only sweat a little bit at the
ends of its nose but not into the rest of its
body. So when it gets very hot, the pig will
start to ____. Heat can then be loss as the
moisture evaporates from the pig’s airway.

Answer 7

pant

Question 8

This evaporative heat loss is not effective when there is high humidity. When pig suffers heat stress, they get agitated and restless. They will salivate as much as half of the needed water to be loss this way and they will start to pant. At a severe stress, panting can reach ____ per minute. If no action is taken or the condition does not change, the pigs will die.

Answer 8

280 breaths

Question 9

When the pig’s temperature drops below normal, the pig could suffer cold stress or hypothermia. However, even its body temperature drops ____ below normal, pigs can recover. If they start to shiver, it is a sign of cold stress. The hair of the pig stands up to try and trap warm air close to the body. Pigs would also huddle with each other to conserve heat and keep warm.

Answer 9

7-8°C

Question 10

is the actual air temperature adjusted for effects of draft, flooring type, building insulation adjusted for effects of draft, flooring type, building insulation and supplemental n and supplemental cooling. This is what pigs really feel.

Answer 10

effective environmental temperature (EET) or thermo-neutral zone

Question 11

Stages of Ventilation

Answer 11

• Minimum Ventilation
• Tunnel Ventilation

Question 12

• House heat removal
• Pig heat removal
• Reduce the temperature of the incoming air

Answer 12

Tunnel Ventilation

Question 13

(measures static pressure)

Answer 13

Manometer

Question 14

• Port of entry for fresh air
• Must be effective opening

Answer 14

Attic Air Intake

Question 15

Feed Delivery
System: (2)

Answer 15

– Auger System
– Chain and Disc System