WINTER ENERGY-REQUIREMENTS OF BLUE GROUSE

Citation
Pj. Pekins et al., WINTER ENERGY-REQUIREMENTS OF BLUE GROUSE, Canadian journal of zoology, 70(1), 1992, pp. 22-24
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Zoology
Journal title
ISSN journal
0008-4301
Volume
70
Issue
1
Year of publication
1992
Pages
22 - 24
Database
ISI
SICI code
0008-4301(1992)70:1<22:WEOBG>2.0.ZU;2-5
Abstract
We measured the effects of temperature (T(a)) on the metabolic rate of 6 blue grouse (Dendragapus obscurus) during winter with indirect resp iration calorimetry. The standard metabolic rate was 0.812 L O2 . (kg0 .734)-1 . h-1 and was 24% higher than that predicted allometrically. T he lower critical temperature (T(lc)) of fasted grouse was -5-degrees- C; metabolism increased linearly below -5-degrees-C. The heat incremen t associated with a Douglas-fir (Pseudotsuga menziesii) diet lowered t he T(lc) by 5-degrees-C. From -5 to -20-degrees-C, the metabolism of f asted and fed grouse increased by 30 and 12%, respectively. A positive winter energy balance was predicted for blue grouse from estimates of the field metabolic rate and the consumption and assimilation rates o f a Douglas-fir diet.