駿河灣東北部の漁況(其の二)

キハダマグロ・カジキ・ブリ・ヒラマサ・アジに就いて

抄録

The greater majority of the fishes dealt with in this report are younger yellowtail and Japanese horse mackerel. The fishing seasons are taburated in the following lines.
Yellowfin tuna, adult……………………Middle of June-middle of October., , , , , I-age group………………, , , , , , -end of September. Sword-fish………………………………June-October. (Histiophorus orientalis……………………Middle of July-October.) Yellowtail, adult…………………………End of May-end of June., , , II-age group……………………Middle of April-middle of May., , , I-age group……………………June-August., , , 0-age group……………………End of July-end. of October. “Hiramasa” (Seriola aureovittata)……………Beginning of April-beginning of June. Japanese horse mackerel……………………March-August.
The following types are recognized in the catch according to the size of the catch and to the fishing grounds.
(A) Larger catch at the mouth of this region of Suruga Bay but smaller toward the interior of it. i) Large on both north (Senbonhama) and south (Enasi) sides……Bluefin tuna, especially I-age young. ii) Large on the north but rather small on the south……Sword-fish (except Histiophorus orientalie) iii) Large on the north but very scarce on the south……Yellowtail and Histiophorus orientalis. (B) Large catch in the interior of the locality in question……Yellowfin tuna, Japanese horse mackerel and Seriola aureovittata.
Remarkably enough, I-age bluefin tuna was obtained at Sigedera fishing ground in an enormous quantity in 1929 and 1932, whereas the size of the catch of the other fishes in the corresponding years at this ground was even smaller than that in other years. But the catch of bluefin tuna here was small in 1931 in contrast with large size of the catch of yellowfin tuna in the same year. At Sigedera fishing ground was noted a very large catch of Histiophorus ori…ntalis and I-age yellowtail in 1926 and 1930.