Rigor Contractions in "Rested" and "Partially Exercised" Chinook Salmon White Muscle as Affected by Temperature |
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| Authors: | A.R JERRETT A.J. HOLLAND S.E. CLEAVER |
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| Affiliation: | Authors Jerrett, Holland and Cleaver are with the Seafood Research Unit, New Zealand Institute for Crop &Food Research Limited, PO Box 5114, Nelson, New Zealand. |
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| Abstract: | Time lapse video was used to determine the effects of temperature and fatigue on the development of rigor contractions in chinooksalmon ( Oncorhynchus tshawytscha ) white muscle. Minimal handling and chemical anaesthesia (AQUI-STM) produced rested fish. After removal of one fillet from the rested fish, post-mortem electrical stimulation of the carcass was used to partially exercise the remaining muscle. Specific strips of rested and partially exercised muscle were held in physiological saline at 0,4,6,8 and 12°C. Contraction onset and end were delayed by decreasing temperature in the rested treatment, but were unaffected in the partially exercised treatment. The final contracted length was affected by fatigue state and temperature. |
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| Keywords: | salmon fatigue effects rigor contractions partial exercise texture |
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