Effects of temperature abuse on textural properties and proteolytic activities during post mortem iced storage of farmed Atlantic cod (Gadus morhua)

Biogenic amine levels and other biochemical indicators were measured to study the safety of and the loss of freshness in iced Atlantic cod. Biogenic amine content exhibited high variability during iced storage of Atlantic cod. Ornithine and lysine decarboxylase activity apparently increased at the end of the storage period. Amino acid activity was probably generated by endogenous amino acid decarboxylases of raw fish. No statistical differences were observed in the total volatile base fraction or in the ammonia or monomethylamine contents during iced storage. However, trimethylamine contents showed a significant exponential relationship with time and sensory score. Cod formed inosine as the major metabolite of IMP. The H and G indices showed a linear relationship with time and sensory score and served as good indicators of cod freshness quality. However, the K, Ki, and P indices showed a logarithmic relationship with time and sensory score. IMP, K, Ki, and P served as indicators of freshness lost during the early stages of chilled storage of cod.

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Myosin heavy chain degradation during post mortem storage of Atlantic cod (Gadus morhua L.)

Food Chemistry ◽

10.1016/j.foodchem.2009.01.031 ◽

2009 ◽

Vol 115 (4) ◽

pp. 1228-1233 ◽

Cited By ~ 18

Author(s):

Pål Anders Wang ◽

Iciar Martinez ◽

Ragnar Ludvig Olsen

Keyword(s):

Myosin Heavy Chain ◽

Heavy Chain ◽

Gadus Morhua ◽

Atlantic Cod ◽

Post Mortem

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Role of Stock Biomass and Temperature in Recruitment of Southern Gulf of St. Lawrence Atlantic Cod, Gadus morhua

Journal of the Fisheries Research Board of Canada ◽

10.1139/f75-187 ◽

1975 ◽

Vol 32 (9) ◽

pp. 1613-1627 ◽

Cited By ~ 5

Author(s):

P. F. Lett ◽

A. C. Kohler ◽

D. N. Fitzgerald

Keyword(s):

Gadus Morhua ◽

Atlantic Cod ◽

Early Life History ◽

Maximum Sustainable Yield ◽

Order Effects ◽

Total Biomass ◽

Stock Biomass ◽

Parent Stock ◽

Effects Of Temperature ◽

Egg Abundance

A multivariate approach was used to elucidate the simultaneous effects of temperature and estimated parent stock biomass on the recruitment mechanism of Gulf of St. Lawrence cod. The second order effects of temperature and estimated stock biomass were key factors in determining egg abundance levels. In addition, egg abundance was closely related to the growth rate of cod. The numbers of larvae increased with the interaction of temperature with egg abundance but decreased with the interaction of egg abundance and time. The most important step in the recruitment mechanism occurs during the juvenile stage, the degree of density dependence being reliant on total biomass of the adult cod stock. A system simulation was constructed amalgamating the equations of early life history of cod with the effects of exploitation on stock biomass. Regular 12-yr oscillations were demonstrated at low levels of catch, while the population became more stable at higher fishing efforts in the absence of environmental effects. The optimal fishing mortality for the Gulf of St. Lawrence cod was found to be F0.4, with a maximum sustainable yield of 42,000 metric tons.

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