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| Format: | Artículo científico |
| Language: | en |
| Published: |
Fundação APINCO de Ciência e Tecnologia Avícolas
2017
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| Online Access: | https://www.redalyc.org/articulo.oa?id=179750697017 |
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Table of Contents:
- Effects of Laser Beak Trimming on the Development of Brown Layer Pullets TG Petrolli OJ Petrolli LK Girardini MLAN Zotti RA Baggio OM Junqueira Agrociencias layers organs oviduct Animal welfare Laser beak trimming is a promising alternative to conventional hot-blade beak trimming as it is less painful and provides better beak uniformity and better animal welfare. In this study, laser vs. hot-blade beak trimming were compared in 400 Hy-line Brown pullets between 2-16 weeks of age. At 7 days of age, birds were distributed according to a completely randomized design into two treatments, with 10 replicates (pens) of 20 birds each. Birds and feed offer and residues were weekly weighed to determine weight gain, feed intake, and feed conversion ratio. In weeks 4, 8, 12, and 16 weeks, one bird per experimental unit was sacrificed to measure the development of the heart development, liver, proventriculus, gizzard, small intestine, and bursa. And of the oviduct in week 16. Pullers submitted to laser beak trimming presented higher weight gain and weekly feed intake, and better feed conversion ratio during the evaluated period. There was no influence of beak trimming methods on the development of the digestive organs, bursa or oviduct. Laser beak trimming can be used as an alternative to hot-blade beak trimming of commercial brown layers. 2017 artículo científico 1516-635X https://www.redalyc.org/articulo.oa?id=179750697017 en http://www.redalyc.org/revista.oa?id=1797 Revista Brasileira de Ciência Avícola application/pdf Fundação APINCO de Ciência e Tecnologia Avícolas Revista Brasileira de Ciência Avícola (Brasil) Num.1 Vol.19