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Performance and carcass characteristics of broiler chickens with different growth potential and submitted to heat stress
| Content Provider | Scilit |
|---|---|
| Author | Rosa, Ps Filho, D. E. Faria Dahlke, F. Vieira, Bs Macari, M. Furlan, Rl |
| Copyright Year | 2007 |
| Description | In order to evaluate the effects of broiler genotype and of heat exposure on performance, carcass characteristics, and protein and fat accretion, six hundred one-day-old male broilers were randomly assigned in a 2 x 3 factorial arrangement, according to the following factors: genetic group (selected and non-selected broilers) and pair-feeding scheme (Ad(32) - reared under heat stress and fed ad libitum; Ad(23) - reared at thermoneutrality and fed ad libitum; Pf(23) - reared at thermoneutrality and pair fed with Ad(32)), with a total of six treatments with four replicates of 25 birds each. Independent of pair-feeding scheme, selected broilers showed better feed conversion, higher carcass yield, and lower abdominal fat deposition rate. However, as compared to non-selected broilers, they reduced more intensively feed intake when heat exposed, which promoted significant breast-yield decrease, and more pronounced changes on carcass chemical composition. These findings allows concluding that, in both genetic groups, both environmental temperature and feed-intake restriction influence abdominal fat deposition rate and other carcass characteristics; however, the impact of heat exposure on broiler performance is more noticeable on the selected line |
| Related Links | http://www.scielo.br/scielo.php?script=sci_pdf&pid=S1516-635X2007000300007&lng=en&nrm=iso&tlng=en |
| Ending Page | 186 |
| Page Count | 6 |
| Starting Page | 181 |
| ISSN | 1516635X |
| e-ISSN | 18069061 |
| DOI | 10.1590/s1516-635x2007000300007 |
| Journal | Brazilian Journal of Poultry Science |
| Issue Number | 3 |
| Volume Number | 9 |
| Language | English |
| Publisher | FapUNIFESP (SciELO) |
| Publisher Date | 2007-09-01 |
| Access Restriction | Open |
| Subject Keyword | Brazilian Journal of Poultry Science Agriculture and Animal Production Carcass Characteristics Heat Stress Growth Potential Broiler Chickens Different Growth Performance and Carcass |
| Content Type | Text |
| Resource Type | Article |
| Subject | Animal Science and Zoology |
