TAILIEUCHUNG - Preservation of fish and meat - Part 2

2 Storage life and spoilage How long can fish or meat be kept? Fresh fish will spoil very quickly. Once the fish has been caught, spoilage progresses rapidly. In the high ambient temperatures of the tropics, fish will spoil within 12 hours. Using good fishing techniques | 2 Storage life and spoilage How long can fish or meat be kept Fresh fish will spoil very quickly. Once the fish has been caught spoilage progresses rapidly. In the high ambient temperatures of the tropics fish will spoil within 12 hours. Using good fishing techniques to ensure the fish is barely damaged and cooling the fish with the help on ice on board can increase the storage life of fresh fish. The speed with which meat spoils not only depends on hygiene conditions and storage temperature but also on the acidity of the meat and the structure of the muscular tissue. The firm muscular tissue of beef for example spoils less quickly than liver. Hygienic slaughtering and clean handling of the carcass have a positive effect on storage life. After slaughtering one should preserve the meat as quickly as possible. When has fish or meat gone bad Spoilage is the deterioration of food which makes it taste and smell bad . when it is sour rotten or mouldy and or makes it a carrier of disease germs. Properties of spoiled fish compared to fresh fish are strong odour dark-red gills with slime on them instead of bright red ones soft flesh with brown traces of blood instead of firm flesh with red blood red milky pupils without slime instead of clear ones The onset of spoilage in meat is seen by changes in colour among other things. Typical spoilage smells also develop such as a rotten egg smell . 8 Preservation of fish and meat Spoiled food when consumed can cause symptoms such as diarrhoea stomach pains nausea and vomiting and stomach infections or cramps. In very serious cases it can cause death. In fish and meat the most important kinds of spoilage are 1 microbiological spoilage caused by bacteria 2 autolytic spoilage caused by enzymes 3 fat oxidation 1 Bacteria are single-celled micro-organisms that are invisible to the naked eye. They break down the wastes and bodies of dead organisms. Some cause severe illness. Under favourable conditions microbiological spoilage

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