Davydov A F, Shaliapina V G
Zh Evol Biokhim Fiziol. 1976 Sep-Oct;12(5):477-9.
Birds (Passer montanus, P. domesticus, Fringilla coelebs) kept in open-air cages in Leningrad during winter, do not differ in total catecholamine content from avian species (P. domesticus, Serinus canaria) which were kept under laboratory conditions at 15--20 degrees. In the sparrow P. montanus, no significaut seasonal changes were observed in catecholamine content; however repetitive cooling up to--10 degrees only at night increased twice the content of catecholamines (especially, noradrenalin) in the pectoral muscle.
冬季饲养在列宁格勒户外笼子里的鸟类（家麻雀、家朱雀、苍头燕雀），其儿茶酚胺总量与饲养在实验室条件下15至20摄氏度环境中的鸟类（家朱雀、金丝雀）并无差异。在家麻雀中，未观察到儿茶酚胺含量有显著的季节性变化；然而，仅在夜间反复降温至零下10摄氏度，会使胸肌中的儿茶酚胺（尤其是去甲肾上腺素）含量增加两倍。
