Some Effects of Increasing Environmental Temperatures on Pullets
1948; Elsevier BV; Volume: 27; Issue: 6 Linguagem: Inglês
10.3382/ps.0270813
ISSN1525-3171
Autores Tópico(s)Livestock and Poultry Management
ResumoSOME of the seasonal variations in egg production, fertility and hatchability are attributed by poultrymen to be due to environmental effects. Hence, the role of environment on the performance of chickens has long been recognized. Birds have highly variable body temperatures according to Baldwin and Kendeigh (1932). They found that muscular activity was the most important factor causing variations in body temperature. Normal body temperatures in eight species of passeriform birds were found to vary as much as 10°F., ranging from the lowest normal body temperature of 102.0°F. to the highest which was 112.3°F. The normal body temperature of chickens varies from 104.6 to 109.4°F. according to Fronda (1931). This agrees with the normal temperatures during the spring of 106.1±.09 and 105.4±.03°F. reported by Lee et al., (1945) for Leghorns and Australorps respectively. Heywang (1938) found that body temperature of hens was affected by environmental temperature. Lamoreux and Hutt (1939) . . .
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