Open AccessBiochemical changes in the abdominal muscle of mud crab Scylla serrata during storage
Author(s) -
CHIOU TzeKuei,
HUANG JuiPeng
Publication year - 2004
Publication title -
fisheries science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.412
H-Index - 64
eISSN - 1444-2906
pISSN - 0919-9268
DOI - 10.1111/j.1444-2906.2003.00785.x
Subject(s) - chemistry , arginine , glycogen , glycine , biochemistry , food science , alanine , ammonia , scylla serrata , energy charge , amino acid , zoology , biology , fishery , enzyme , adenylate kinase
Changes in levels of pH, volatile basic nitrogen (VBN), K ‐value, glycogen, adenosine triphosphate (ATP) and its related compounds (ARC), and free amino acids (FAA) in the abdominal muscle of live mud crabs stored at 10°C and 25°C were investigated. Levels of pH, VBN, and K ‐value did not increase until 2 days of storage, whereas the energy charge and glycogen levels declined rapidly during the early period of storage. The onset of initial decomposition of the mud crab muscle was observed after storage at 10°C for 6 days and 25°C for 3 days. The initial ATP concentration was high but decreased by 76–80% on day 2 of storage. The total nucleotide contents in the 2‐day‐stored samples accounted for 82–83% of the total ARC. The value decreased to 50% after storage at 10°C for 4 days. Glycine, arginine, glutamine, alanine and proline were the major FAA. Total amounts of FAA and taste‐active amino acids including glycine, arginine, alanine and glutamic acid had no apparent change during storage at 10°C, while an increase of 14–38% was found prior to the initial decomposition stage at 25°C. In both storages, ornithine, citrulline and ammonia increased markedly in the stage of initial decomposition.