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  • Behaviour  (1)
  • Cell & Developmental Biology  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pflügers Archiv 353 (1975), S. 139-149 
    ISSN: 1432-2013
    Keywords: Pig ; Thermoregulation ; Metabolism ; Behaviour
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Pigs were trained to perform an operant response for a reinforcement of radiant heat and comparisons were made between oxygen consumption during sessions when extra heat was available and others when it was not. It was found that as judged by the rate of oxygen consumption the efficiency with which heat was obtained was very high when the radiation was allowed to increase air temperature, but declined when air temperature remained low. If the pig had to make several responses for a single reinforcement, there was no saving in oxygen consumption. Reducing the intensity of the heating led to a reduction in the frequency at which responses were made. When the reinforcement was a brief respite from a draught, the pigs performed a greater number of responses at low ambient temperatures, but this was not accompanied by any saving in the rate of oxygen consumption.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    The @Anatomical Record 163 (1969), S. 517-524 
    ISSN: 0003-276X
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: The vascular supply to the skin of pigs was studied in animals perfused with the dye, monastral fast blue. The arrangement of the blood vessels in control animals was in three plexuses, similar to that in other mammals but with the middle plexus poorly developed.A litter of pigs was divided into two groups at the age of 12 days and one group was raised in a warm room and the other in a cold room. The pigs were killed at age three months when the warm room was 35°C and the cold room 5°C. A quantitative evaluation of the blood supply to the skin of the experimental animals revealed that the pigs from the warm room had more blood vessels in the skin than those raised in the cold; the difference was statistically significant (P 〈 0.01). In the case of pigs from a second litter reared at 35°C and 20°C, no significant difference in the number of blood vessels was detected.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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