You are not currently logged in.
Access JSTOR through your library or other institution:
Morphological Changes in Swine Associated with Environmental Temperature
Morris E. Weaver and Douglas L. Ingram
Vol. 50, No. 4 (Jul., 1969), pp. 710-713
Stable URL: http://www.jstor.org/stable/1936264
Page Count: 4
You can always find the topics here!Topics: Animals, Swine, Ambient temperature, Climate models, Animal tails, Appendages, Mammals, Animal ecology, Animal morphology, Hair
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Preview not available
Ten animals from two litters of English large white pigs were weaned at 12-15 days of age and placed one per cage within constant-temperature rooms. In the first group, a comparison was made between three animals raised at 5⚬C and their littermates raised at 35⚬C. There were marked differences in appearance and in gross morphology. Those from the cold environment had more hair, were shorter and more stocky, and had a shorter tail and smaller ears than their littermates. A second group of animals were raised at 20⚬C and 35⚬C; it was found that with respect to all measurements the 20⚬C pigs were intermediate between the 5⚬ and 35⚬C animals. These observations accord with Bergmann's Rule that animals raised in colder environments are characterized by a reduced surface area/body weight ratio. The results likewise substantiate Allen's Rule that in colder climates the length of appendages and of extremities is reduced.
Ecology © 1969 Wiley