Nine inorganic elements, i.e., calcium (Ca), phosphorus (P), iron (Fe), sodium (Na), potassium (K), magnesium (Mg), zinc (Zn), manganese (Mn) and copper (Cu), were determined in edible aquatic animals: fourteen species of fish, two species of shrimp and three species of shellfish, in Lake Biwa in Japan.
The results obtained were as follows.
(1) The contents of Ca and P were generally high in whole body or semidressed part of fishes and whole body of shrimps. High levels of these elements were considered to be due to the presence of bone, scale or shell.
(2) The contents of Fe and Cu were generally high in liver or hepatopancreas of fishes and the content of Fe was especially high in the stripped part of Setashijimi and Cu was especially high in liver of Biwamasu.
(3) The content of Na was relatively high in liver or hepatopancreas of fishes and whole body of shrimps.
(4) The content of K was relatively high in muscle of fishes and was low in stripped part of shellfishes.
(5) The content of Mg was relatively low in stripped part of shellfishes.
(6) The content of Zn was high in ovary of fishes.
(7) The content of Mn was especially high in stripped part of Karasugai and Ishigai.
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