Differential abundance of muscle proteome in cultured channel catfish (Ictalurus punctatus) subjected to ante-mortem stressors and its impact on fillet quality

Michael A. Ciaramella, Mahesh N. Nair, Surendranath P. Suman, Peter J. Allen, M. Wes Schilling

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The effects of environmental and handling stress during catfish (Ictalurus punctatus) aquaculture were evaluated to identify the biochemical alterations they induce in the muscle proteome and their impacts on fillet quality. Temperature (25 °C and 33 °C) and oxygen (~ 2.5 mg/L [L] and > 5 mg/L [H]) were manipulated followed by sequential socking (S) and transport (T) stress to evaluate changes in quality when fish were subjected to handling (25-H-ST; temperature-oxygen-handling), oxygen stress (25-L-ST), temperature stress (33-H-ST) and severe stress (33-L-ST). Instrumental color and texture of fillets were evaluated, and muscle proteome profile was analyzed. Fillet redness, yellowness and chroma decreased, and hue angle increased in all treatments except temperature stress (33-H-ST). Alterations in texture compared to controls were observed when oxygen levels were held high. In general, changes in the abundance of structural proteins and those involved in protein regulation and energy metabolism were identified. Rearing under hypoxic conditions demonstrated a shift in metabolism to ketogenic pathways and a suppression of the stress-induced changes as the severity of the stress increased. Increased proteolytic activity observed through the down-regulation of various structural proteins could be responsible for the alterations in color and texture.

Original languageEnglish
Pages (from-to)10-18
Number of pages9
JournalComparative Biochemistry and Physiology - Part D: Genomics and Proteomics
Volume20
DOIs
StatePublished - Dec 1 2016

Bibliographical note

Publisher Copyright:
© 2016

Keywords

  • Color
  • Environmental stress
  • Handling stress
  • Proteomics
  • Texture

ASJC Scopus subject areas

  • Biochemistry
  • Physiology
  • Aquatic Science
  • Animal Science and Zoology
  • Molecular Biology
  • Genetics

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