|
|
|
|
|
| Rios,RL; Bertechini,AG; Carvalho,JCC; Castro,SF; Costa,VA. |
| Three experiments were carrie out to evaluate the influence of cage density on the performance of 25- to 84-week-old laying hens. Forty hundred Lohmann-LSL layers were distributed in cages (100x40x 45x50cm) according to a completely randomized experimental design with split plot in time.Three treatments (10, 12, or 14 hens per cage, corresponding, to 450, 375, and 321cm²/bird, respectively), with 15 assessment periods (four weeks each), and eight replicates per treatment were applied. Considering that layer's production cycle is affected by age, three experimental trials (25 to 44; 45 to 64 and 65 to 84 weeks of age) were carried out, and the data collected in each trial was individually analyzed. Increasing cage density significantly reduced feed intake... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds per cage; Cage density; Egg production; Laying hens. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000400007 |
| |
|
|
| Barrios,PR; Marín,SY; Resende,M; Rios,RL; Resende,JS; Horta,RS; Costa,MP; Martins,NRS. |
| The occurrence of CAV in backyard chickens in the metropolitan area of Belo Horizonte, Brazil, was evaluated. The spleen and thymus of chickens from different origins were collected for DNA extraction and nested-PCR. CAV genome was detected in 30% of the flocks (n=20) examined. CAV origin for backyard chickens is speculated, taking into consideration its widespread incidence in the chicken industry, the contamination of live vaccines with CAV prior to its eradication from SPF flocks, and the use of attenuated CAV vaccines. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Backyard chickens; CAV; Chicken; Chicken infectious anemia virus. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2009000200010 |
| |
|
|
|
