Programas de luz sobre o desempenho e parâmetros seminais de galos semi-pesados

• Autor(a) principal: Maciel, Mônica Patrícia
• Data de Publicação: 2011
• Outros Autores: Cotta, Judas Tadeu de Barros, Murgas, Luis David Solis, Lima, Daniele de, Lima, Fernanda Pinheiro, Alvarenga, Ana Luisa Neves
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://repositorio.ufla.br/jspui/handle/1/39181
• topic: Animais - Efeitos da luz; Luz contínua; Luz intermitente; Luz natural; Sêmen - Qualidade; Animals - Effect of light; Continuous light; Intermittent light; Natural light; Semen - Quality

This study aimed to evaluate the influence of different lighting programs on the performance and semen parameters of semi-heavy cock strain. Twenty four roosters, aging 19 weeks, of the Lohman Brown strain were used, and submitted to three treatments: 1) continuous lightning programs 2) intermittent lightning programs and 3) increasing natural lightning programs. The animals were distributed into a completely randomized design, with 8 replicates being the experimental unit constituted of 1 animal. The experimental period lasted 140 days and the evaluated variables were: feed intake (g/chicken/day), body weight (g), semen production (ml), motility (%) and vigor (0 to 5) of the sperm, spermatic concentration (cells number x 109), total spermatic cells (NCT- volume x concentration) and spermatic morphology (head, tail and total alterations). The semi-heavy roosters submitted to continuous and intermittent lightning programs presented greater semen production and greater NCT (P<0,05). There was no significant influence (P>0.05) of the treatments on the other variables. It was concluded that the programs of continuous and intermittent light can be used for semi-heavy cocks during the breeding season, without sacrificing performance and sêmen parameters.