The landing values (tonnage) of giant abalone
Haliotis madaka are uncertain in most landing places, because they are treated in the same category with
H. gigantea. We estimated their landing values from annual abalone landings and the record of shell lengths of the three abalone species by Ojika Town Office, in Ojika Islands, Nagasaki Prefecture. In 1998, the annual landed values of
H. madaka were considered to be 1.2 mt, and the ratio to the total abalone landing was 7%. After 1998, the landed values have decreased year by year, and no specimens were landed after 2009.
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