抄録
The author studied on the annual variation of fishing condition of bigeyed tuna of an area of the Pacific Ocean spreading from Marshall Islands to Palmyra Island.
The rate-of-catch (catch number per one hundred hooks) of bigeyed tuna in that area was considerably high in 1952, declined in 1953, declined a little in 1954 and 1955, declined very much in 1956, increased very much in 1957, increased a little in 1958 and again declined a great deal in 1959 (Fig. 1).
