PMID- 28309731
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20191120
IS  - 1432-1939 (Electronic)
IS  - 0029-8549 (Linking)
VI  - 35
IP  - 2
DP  - 1978 Jan
TI  - Seasonal acclimatization to temperature in monk parakeets.
PG  - 173-183
LID - 10.1007/BF00344730 [doi]
AB  - Metabolism and insulation of monk parakeets were determined in summer and 
      compared with previously reported winter values. Fasting levels of metabolism 
      were the same in winter and summer during the daytime: nighttime values were 
      significantly lower in winter (6.11 versus 8.20 Wkg(-1)). Evaporative water loss 
      at 20-30 degrees  C was significantly lower in winter (2.24 versus 3.05 mg H(2)O g(-1) 
      h(-1)). Winter birds were better able to maintain body temperature (Tb) 
      independent of ambient temperature (Ta) below 20 degrees  C than were summer birds. 
      Coefficients of dry heat transfer determined for Tb-Ta gradients greater than 10 degrees  
      C were not significantly different for the two seasons. Similarly, the slope of 
      the line relating oxygen consumption to Ta below thermal neutrality (i.e. thermal 
      conductance) was the same in winter and summer birds, indicating no seasonal 
      change in overall body insulation. Literature review revealed a relation between 
      seasonal change in fasting metabolic rate (FMR) and body size in birds. Winter 
      FMR as a fraction of summer FMR is inversely, related to body mass (Mb) by the 
      equation; winter FMR/summer FMR=1.49 Mb (-0.077) where Mb is in grams. Thus, in 
      small birds FMR is higher in winter than summer, while for large birds (>200 g) 
      the converse is true.
FAU - Weathers, Wesley W
AU  - Weathers WW
AD  - Department of Environmental Physiology, Rutgers-The State University, 08903, New 
      Brunswick, NJ, USA.
AD  - Department of Entomology and Economic Zoology, Rutgers-The State University, 
      08903, New Brunswick, NJ, USA.
FAU - Caccamise, Donald F
AU  - Caccamise DF
AD  - Department of Environmental Physiology, Rutgers-The State University, 08903, New 
      Brunswick, NJ, USA.
AD  - Department of Entomology and Economic Zoology, Rutgers-The State University, 
      08903, New Brunswick, NJ, USA.
LA  - eng
PT  - Journal Article
PL  - Germany
TA  - Oecologia
JT  - Oecologia
JID - 0150372
EDAT- 1978/01/01 00:00
MHDA- 1978/01/01 00:01
CRDT- 2017/03/18 06:00
PHST- 1977/12/05 00:00 [received]
PHST- 2017/03/18 06:00 [entrez]
PHST- 1978/01/01 00:00 [pubmed]
PHST- 1978/01/01 00:01 [medline]
AID - 10.1007/BF00344730 [pii]
AID - 10.1007/BF00344730 [doi]
PST - ppublish
SO  - Oecologia. 1978 Jan;35(2):173-183. doi: 10.1007/BF00344730.