ON THE CAUSE OF ANNUAL VARIATION OF FISHING CONDITION OF BIGEYED TUNA IN THE AREA FROM MARSHALL ISLANDS TO PALMYRA ISLAND-III:RELATION BETWEEN MONTHLY AND ANNUAL VARIATIONS OF FISHING CONDITION AND THOSE OF SURFACE WATER TEMPERATURE OF THE FISHING GROUND

概要

論文の詳細を見る
The author studied on the direct relation between monthly and annual variations of fishing condition of bigeyed tuna and those of surface water temperature in the area of lat. 5-15°N, and long. 160-180°W. 1) The surface water temperature in average by month was low (26-27°C) in the first half of a year and was high (28-29°C) in the latter half (Fig. 1). 2) The rate-of-catch (catch number per one hundred hooks) was high in the period (the first half of year) when the surface water temperature was low (Fig. 1). 3) The rate-of-catch and the surface water temperature vary annually, however, the direct relation between them could not be seen (Fig. 2).
社団法人日本水産学会の論文