الفهرس 
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Abstract
The present study was carried out to detect and determine biogenic amines residues(histamine, tyramine and putrescine) in local and imported Canned Tuna and Mackerel fish (25 of each) which were collected from different supermarkets in Menofia and Cairo Governorates.
The obtained results revealed that the mean values of histamine levels (mg/kg) were 22.86±0.72, 25.3±0.603&19.2±0.448 in all local Tuna, local Tuna A and local Tuna B samples , respectively. Also, 19.48±0.64, 21.6±0.468 & 16.3±0.601 in all imported Tuna, imported Tuna A and imported Tuna B samples, respectively. Also, the histamine means for all local Mackerel, local Mackerel A and local Mackerel B were 36.72±1.807,42.33±1.75&27.8±0.711 in all local Mackerel, local Mackerel A and local Mackerel B samples ,respectively. Further,29.04±1.46, 33.066±1.75and 23±0.63 in all imported Mackerel, imported Mackerel A and imported Mackerel B samples, respectively.
On the other hand the mean values of tyramine in all local Tuna, local Tuna A and local Tuna B samples were 0.274±0.035, 0.36±0.040 & 0.141±0.38, respectively. In all imported Tuna, imported Tuna A and imported Tuna B samples 0.184±0.177, 0.242±0.016 &0.099±0.009, respectively. And also, its means for all local Mackerel, Mackerel A and local Mackerel B samples ,they were 0.393±0.0485, 0.556±0.040 & 0.174±0.015, respectively. Also, 0.368±0.047, 0.497±0.058 and 0.148±0.026 in all imported Mackerel, imported Mackerel and imported Mackerel B samples, respectively.