TY  - JOUR
T1  - The Effects of Heat Stress on Egg Production and Quality of Laying Hens
AU - Simsek, Ercan AU - Kilic, Ilker 
JO  - Journal of Animal and Veterinary Advances
VL  - 12
IS  - 1
SP  - 42
EP  - 47
PY  - 2013
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2013.42.47
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2013.42.47
KW  - Heat stress
KW  -THI
KW  -laying hens
KW  -egg production
KW  -egg quality
AB  - The aim of this study was to determine effects of heat stress 
  on egg production and quality characteristics, revealed THI distribution among 
  cage blocks. Ambient dry bulb temperature and relative humidity measurements 
  were recorded for cages and all of layer house in 31 days during July and August. 
  The egg production in selected cages was recorded daily in this study. To determine 
  egg weight, shape index, shell thickness, albumen index, yolk index and Haugh 
  units scores, 30 eggs were collected daily from selected each cages. For indoor 
  temperatures and relative humidity, average values were obtained as 31.15°C 
  and 44.68%, respectively. The average outdoor temperature and relative humidity 
  were about 34.11°C and 59.91%, respectively during study period in region 
  conditions. The differences between cage rows, cage tiers and direction were 
  not statistically significant for THI value (p>0.05). When the THI values 
  increased from 25-29, heat stress reduced egg production by 25%. The converse 
  effect of heat stress was most likely mediated through a reduction in feed consumption, 
  reducing the available nutrients for egg production. Based on results of statistical 
  analysis, variation on egg quality characteristics versus THI values is not 
  statistically significant for whole study period.
ER  -