Rigor tension development in excised "rested", "partially exercised" and "exhausted" chinook salmon white muscle

Isometric rigorometry was used to study rigor tensions in "rested" "partially exercised" and "exhausted" chinook salmon (Oncorhynchus tshawytscha) white muscle at the pre-mortem acclimated temperature. Conservative handling and anaesthesia (AGUI-STM) minimized pre-morte...

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Bibliographic Details
Published in:Journal of food science 1998-01, Vol.63 (1), p.48-52
Main Authors: Jerrett, A.R. (New Zealand Institute of Crop and Food Research Limited, Nelson, New Zealand.), Holland, A.J
Format: Article
Language:English
Subjects:
ANIMAL TISSUES
Biological and medical sciences
ELABORACION DEL PESCADO
FATIGUE
FISH
Fish and seafood industries
FISH PROCESSING
Food industries
Food science
Fundamental and applied biological sciences. Psychology
MUSCLE
MUSCLES
MUSCULOS
ONCORHYNCHUS TSHAWYTSCHA
partially exercised muscle
PESCADO
POISSON (ALIMENT)
RESISTANCE MECANIQUE
RESISTENCIA MECANICA
rested muscle
RIGOR MATTER
rigor tension
SALMON
SAUMON
STRENGTH
TEJIDOS ANIMALES
TENSILE STRENGTH
TISSU ANIMAL
TRAITEMENT DU POISSON
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Summary:Isometric rigorometry was used to study rigor tensions in "rested" "partially exercised" and "exhausted" chinook salmon (Oncorhynchus tshawytscha) white muscle at the pre-mortem acclimated temperature. Conservative handling and anaesthesia (AGUI-STM) minimized pre-mortem exercise and provided "rested" fish. Post-mortem electrical stimulation produced "partially exercised" (180 contractions) and "exhausted" (360 contractions) muscle. A "relaxation" stress that decreased with increasing exercise was measured. The amplitude of the "relaxation" and contraction stress was the same for each treatment (F2, 12= 0.24; p=0.79). Rigor contraction onset coincided with an intra-muscular pH of 6.6 in each treatment (F2, 12=0.28, p=0.76). Contraction stress abatement coincided with an "ultimate" pH of 6.2 in each of the treatments (F1, 12=0.05; p=0.83)
ISSN:0022-1147
1750-3841
DOI:10.1111/j.1365-2621.1998.tb15673.x