PMID- 3628168
OWN - NLM
STAT- MEDLINE
DCOM- 19871013
LR  - 20200307
IS  - 0032-5791 (Print)
IS  - 0032-5791 (Linking)
VI  - 66
IP  - 5
DP  - 1987 May
TI  - Fasting metabolic rate in hens. 1. Effects of body weight, feather loss, and 
      activity.
PG  - 881-90
AB  - Environmental factors affecting fasting metabolic rate (FMR) were quantified and 
      a short-time recording system was developed. Discontinuous measurements of gas 
      exchange of 1,120 medium weight brown egg layers were taken after 24 and 36 hr of 
      starvation. Body weight (BW) and shank length (SL) were measured and feather 
      cover and activity evaluated by scores. The FMR increased with deterioration of 
      plumage cover. Differences between hens with complete feather cover (Score 1) and 
      nearly naked birds (Score 4) were 8 kJ2/hr at night and 11 kJ/hr during the light 
      phase. Fully fed hens measured during the light phase showed the same curvilinear 
      relationship as starved birds. Only a small proportion of the heat increment 
      generated by ingested food is used by poorly feathered hens to maintain body 
      temperature. Gaseous exchange was affected by locomotor activity in the 
      respiration chamber. The FMR of resting and quietly standing birds were 29.75 +/- 
      1.00 kJ/hr and 30.55 +/- 1.00 kJ/hr, respectively. During the prelaying phase, 
      FMR showed an increment of 13 kJ/hr with a peak shortly before oviposition. The 
      following exponential relationships between BW in kilograms, and SL in 
      centimeters with FMR were estimated for light phase FMR = 18.52 BW .59 +/- .05 
      kJ/hr, R2 = .11; for dark phase FMR = 15.21 BW 54 +/- .04 kJ/hr, R2 = .17 and FMR 
      = .32 SL 1.64 +/- .10 kJ/hr, R2 = .19. In poorly feathered strains, SL was as 
      good a predictor of body size as BW. Correcting FMR data for feather loss changed 
      regression coefficients and allometric functions significantly: for light phase 
      FMR = 15.47 BW .74 +/- .03 kJ/hr and R2 = .15; for dark phase FMR = 13.11 BW .66 
      +/- .03 kJ/hr and R2 = .28.
FAU - Damme, K
AU  - Damme K
FAU - Pirchner, F
AU  - Pirchner F
FAU - Willeke, H
AU  - Willeke H
FAU - Eichinger, H
AU  - Eichinger H
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - England
TA  - Poult Sci
JT  - Poultry science
JID - 0401150
SB  - IM
MH  - Animals
MH  - *Body Weight
MH  - Chickens/*metabolism
MH  - *Fasting
MH  - *Feathers
MH  - Female
MH  - Motor Activity/*physiology
EDAT- 1987/05/01 00:00
MHDA- 1987/05/01 00:01
CRDT- 1987/05/01 00:00
PHST- 1987/05/01 00:00 [pubmed]
PHST- 1987/05/01 00:01 [medline]
PHST- 1987/05/01 00:00 [entrez]
AID - S0032-5791(19)52729-8 [pii]
AID - 10.3382/ps.0660881 [doi]
PST - ppublish
SO  - Poult Sci. 1987 May;66(5):881-90. doi: 10.3382/ps.0660881.