Pre-Slaughter stress affects ryanodine receptor protein gene expression and the water-holding capacity in fillets of the nile Tilapia.

• Autor(a) principal: GOES, E. S. R.
• Data de Publicação: 2015
• Outros Autores: LARA, J. A. F. de, GASPARINO, E., DEL VESCO, A. P., GOES, M. D., ALEXANDRE FILHO, L., RIBEIRO, R. P.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
• Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1026757
• topic: Live fish; Fish behaviour; Tilapia; Peixe; Stress; Fish meat; Slaughter; fish

Current study evaluated the effect of pre-slaughter stress on serum cortisol levels, pH, colorimetry, water-holding capacity (WHC) and gene expression of ryanodine receptors (RyR1 and RyR3) in the Nile tilapia. A 3x4 factorial scheme experiment was conducted comprising three densities (100, 200, 400 kg/m³) with four transportation times (60, 120, 180, and 240 minutes).Transportation times alone reduced cortisol levels up to 180 minutes, followed by increased WHC and mRNA expression, RyR1 and RyR3 (200 kg/m³ density). No effect of density x transportation time interacted on the evaluated parameters. Results provided the first evidence that pre-slaughter stress affected ryanodine gene expression receptors and, consequently, the water-holding capacity in tilapia fillets.