The rise in inosine monophosphate and l-lactate concentrations in muscle of live penaeid prawns (Penaeus japonicus,Penaeus monodon) stressed by storage out of water |
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| Affiliation: | 1. Division of Rehabilitation Science and Division of Physical Therapy, Department of Rehabilitation Medicine, University of Minnesota, Minneapolis, USA;2. Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, USA;3. Department of Pediatrics, University of Minnesota, Minneapolis, USA;4. Department of Neurology, University of Minnesota, Minneapolis, USA;1. Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine, No. 48#, Yingxiongshan Road, Jinan 250002, China;2. Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases in Universities of Shandong, Eye Institute of Shandong University of Traditional Chinese Medicine, No. 48#, Yingxiongshan Road, Jinan 250002, China;3. Institute of Basic Medicine, Shandong Academy of Medical Sciences, Jinan 250002, China |
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| Abstract: | - 1.1. This work aimed to establish why some species of prawns survived longer than others during simulated commercial shipment.
- 2.2. Metabolism of kuruma prawns, Penaeus japonicus, and black tiger prawns, P. monodon, stored for up to 24 hr in dry sawdust was studied by measuring concentrations of l-lactate, adenylate nucleotides and inosine monophosphate (IMP) in abdominal muscle.
- 3.3. When P. japonicus was stored in sawdust at 12°C the adenylate energy charge (AEC) did not fall and no lactate or IMP accumulated after 24 hr. However, the AEC fell in P. monodon stored at a temperature of 12°C and in P. japonicus stored at higher temperatures. When AEC fell below 0.5–0.6 there was an increase in muscle lactate and IMP concentration.
- 4.4. The results show that high concentrations of lactate and IMP in muscle tissue, at a given temperature, can be used to demonstrate that a prawn has been out of water for too long.
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