Criteria for evaluating husbandry practices to alleviate heat stress in broilers
| dc.contributor.author | Yalcin, S | |
| dc.contributor.author | Özkan, S | |
| dc.contributor.author | Çabuk, M | |
| dc.contributor.author | Siegel, PB | |
| dc.date.accessioned | 2024-07-18T12:05:17Z | |
| dc.date.available | 2024-07-18T12:05:17Z | |
| dc.description.abstract | This study was undertaken to investigate the effects of management techniques used under heat stress on growth as well as developmental instability, duration of tonic immobility (TI), and heterophil-to-lymphocyte ratios (H:L) of broilers. Three-hundred sixty cockerels obtained from a commercial hatchery were randomly assigned to 12 floor pens. When the cockerels reached 21 d of age, three pens were kept as controls. Broilers in the other nine pens were moved to a room heated from 32 to 35degreesC between 1000 and 1700 h each day from 21 to 42 d of age. Broilers in the heated room were randomized into three treatment groups consisting of 1) conditioned (chicks exposed to 36degreesC for 24 h at 5 d of age), 2) feed-restricted (during the heat stress, feed was withdrawn 2 h before the hot period, and chicks were fed between 1700 and 0800 h), 3) and heat-stressed only. Conditioned and feed-restricted broilers gained 3.2 and 2.8%, respectively, more BW than heat-stressed broilers. Relative asymmetry (RA) averaged across several bilateral traits for the prolonged heat stressor was more informative than the RA for a single bilateral trait. Corrrelations suggest that RA were not closely associated with duration of TI and H:L under the conditions of this experiment. | |
| dc.identifier.issn | 1056-6171 | |
| dc.identifier.other | 1537-0437 | |
| dc.identifier.uri | http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/9663 | |
| dc.language.iso | English | |
| dc.publisher | ELSEVIER | |
| dc.subject | TONIC IMMOBILITY REACTION | |
| dc.subject | HETEROPHIL LYMPHOCYTE-RESPONSES | |
| dc.subject | DEVELOPMENTAL STABILITY | |
| dc.subject | DOMESTIC-FOWL | |
| dc.subject | CHICKENS | |
| dc.subject | STOCKS | |
| dc.subject | RATIO | |
| dc.subject | TEMPERATURE | |
| dc.subject | INSTABILITY | |
| dc.subject | ASYMMETRY | |
| dc.title | Criteria for evaluating husbandry practices to alleviate heat stress in broilers | |
| dc.type | Article |