Abstract
The distribution of manganese in several marine fishes was investigated (shown in Table 1). Manganese was determined by a polarographic method using NH4Cl and NH3 as a supporting electrolyte.
The amount of manganese is largest in such inner organs as stomach, liver and spleen, less in flesh and lest in such hard parts as gills, heads and bones (shown in Table 2). Manganese is known as an element playing an important role in living bodies, but it is strange that manganese content is comparatively low in ovary and testes, and high in stomach and intestine.
The above conclusions were derived from the average quantities of manganese in several fishes, but in individual cases some specialities were found: namely, in the stomach and liver of Lophius litulon (Ki-ankô), one of deep-sea fishes, the content of manganese amounts to only a fifth to a seventh of that in other fishes; gills of Pneumatophorus japonicus (Honsaba) cotain seven times as much manganese as others; and in Katsuwonus pelamis (Katsuo) red flesh has more manganese than white one.
