Photoperiodicity and the thermoregulatory response to noradrenaline in the pigeon

A. Haim, S. Saarela, R. Hissa

Research output: Contribution to journalArticlepeer-review


1. 1.|Pigeons acclimated to darkness (24D, Ta = 22°C) or long scotophase (4L:20D, Ta = 22°C) responded to noradrenaline at Ta = 6°C as if cold-acclimated. Shivering was inhibited, and VoO2 consumption and body temperature were decreased significantly (P < <0.02). 2. 2.|The response of pigeons acclimated to light (24L, Ta = 22°C) was high but not significantly different from the control group (12L:12D, Ta = 22°C). 3. 3.|In pigeons acclimated to 4L:20D (Ta = 32°C) shivering was not completely inhibited, even for a short period. 4. 4.|A linear relationship was found between decreasing VO2 noradrenaline, which appeared to effect heat production rather than heat dissipation.

Original languageEnglish
Pages (from-to)167-171
Number of pages5
JournalJournal of Thermal Biology
Issue number2
StatePublished - Apr 1979
Externally publishedYes

Bibliographical note

Funding Information:
This research was supported by a scholarship from the Finnish Ministry of Education and the National Science Council of Finland.


  • Noradrenaline
  • acclimation
  • oxygen-consumption
  • photoperiod
  • shivering
  • thermoregulation

ASJC Scopus subject areas

  • General Agricultural and Biological Sciences
  • Physiology
  • Biochemistry
  • Developmental Biology


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