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Some factors affecting Norway lobster ( Nephrops norvegicus ) cuticle polyphenol oxidase activity and blackspot development
Author(s) -
Bartolo Ivan,
Birk Else O.
Publication year - 1998
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1046/j.1365-2621.1998.00168.x
Subject(s) - nephrops norvegicus , cuticle (hair) , polyphenol , polyphenol oxidase , chemistry , fishery , biology , decapoda , crustacean , biochemistry , enzyme , anatomy , antioxidant , peroxidase
Summary Polyphenol oxidase (PPO) activity was measured in the cuticles of Norway lobsters caught over a period of 7 months. Increased PPO activity was observed between early August and early October 1995, coinciding with one of the reported annual periods of peak moulting activity, although a high PPO activity detected in May may have marked the spring moulting period. A relationship was found between the number of claws remaining on the Norway lobsters and the PPO activity, suggesting that exposing Norway lobsters to damage and stress is associated with an increase in PPO activity. No correlation was observed between initial PPO activity and blackspot development during storage of the Norway lobsters. This indicates that biochemical events occurring during storage are more important to blackspot development than the initial PPO level.