The chemical components of Atlantic Mackerel (Scomber scombrus) were investigated. An average of 53.5% of the fish consisted of edible portions, with more than 16% protein. PER values for raw and cooked muscles were 3.7 and 3.1, respectively, with casein being 2.5. The amino acid profile indicated equal or above average values for the essential amino acids when compared to casein. Lipid levels varied seasonally with the moisture content in various edible porfions. A 1:3 ratio of saturated to polyunsaturated fatty acids was observed in this species. Sodium levels were 0.07% on a wet basis which suggests inclusion of this species in low sodium diets.
Spoilage pattern of ice stored Atlantic Mackerel was monitored by determining trimethylamiue (TMA), total aerobic plate counts and histamine levels. Hypoxanthine accumulation was used as the freshness index, coupled with sensory evaluation of fresh fish. These tests indicated that mackerel can be stored fresh in ice up to 9 days, after which the accumulation of bacteria, TMA and histamine was rapid. Hypoxanthine levels increased between O-10 days and appeared to increase at a slightly slower rate until day 16, then it declined.
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