title: New icing media for quality enhancement of chilled hake (Merluccius merluccius) using a jumbo squid (Dosidicus gigas) skin extract.
abstract: BACKGROUND
  An advanced strategy for chilled fish preservation, based on the inclusion in ice of an extract of jumbo squid (Dosidicus gigas) skin (JSS), is proposed. Aqueous solutions including acetic acid-ethanol extracts of JSS were tested at two different concentrations as icing media, with the effects on the quality evolution of chilled hake (Merluccius merluccius) being monitored.
  
  
  RESULTS
  A significant inhibition (P < 0.05) of microbial activity (aerobes, psychrotrophs, Enterobacteriaceae, proteolytic bacteria; pH, trimethylamine) was obtained in hake corresponding to the icing batch including the highest JSS concentration. Additionally, fish specimens from such icing conditions showed an inhibitory effect (P < 0.05) on lipid hydrolysis development, while no effect (P > 0.05) was depicted for lipid oxidation. Sensory analysis (skin and mucus development; eyes; gills; texture; external odour; raw and cooked flesh odour; flesh taste) indicated a shelf life extension of chilled hake stored in ice including the highest JSS concentration.
  
  
  CONCLUSIONS
  A profitable use of JSS, an industrial by-product during jumbo squid commercialisation, has been developed in the present work, which leads to a remarkable microbial inhibition and a significant shelf life extension of chilled hake. In agreement with previous research, ommochrome pigments (i.e. lipophilic-type compounds) would be considered responsible for this preservative effect. © 2016 Society of Chemical Industry.
authors.affiliation: Departamento de Investigación y Posgrado en Alimentos, University of Sonora, Hermosillo, Sonora, Mexico.
authors.forename: Josafat Marina
authors.initials: JM
authors.lastname: Ezquerra-Brauer
authors.affiliation: Department of Analytical Chemistry, Nutrition and Food Science, School of Veterinary Sciences, University of Santiago de Compostela, Lugo, Spain.
authors.forename: José M
authors.initials: JM
authors.lastname: Miranda
authors.affiliation: Departamento de Investigación y Posgrado en Alimentos, University of Sonora, Hermosillo, Sonora, Mexico.
authors.forename: Jesús Enrique
authors.initials: JE
authors.lastname: Chan-Higuera
authors.affiliation: Department of Analytical Chemistry, Nutrition and Food Science, School of Veterinary Sciences, University of Santiago de Compostela, Lugo, Spain.
authors.forename: Jorge
authors.initials: J
authors.lastname: Barros-Velázquez
authors.affiliation: Department of Food Technology, Marine Research Institute (CSIC), Vigo, Spain.
authors.forename: Santiago P
authors.initials: SP
authors.lastname: Aubourg
mesh_terms: D000818:Animals; D001419:Bacteria / Q000145:classification / Q000235:genetics / Q000254:growth & development* / Q000302:isolation & purification; D015169:Colony Count, Microbial; D049832:Decapodiformes / Q000737:chemistry*; D005399:Fishes / Q000382:microbiology; D005506:Food Contamination / Q000517:prevention & control; D005519:Food Preservation / Q000379:methods*; D048388:Gadiformes / Q000382:microbiology*; D009812:Odorants / Q000032:analysis; D017747:Seafood / Q000032:analysis* / Q000382:microbiology; D012867:Skin / Q000737:chemistry*
keywords: Dosidicus gigas; hake; icing media; microbial inhibition; ommochrome pigments; skin