フイッシュミール船団所属以東底曳船のベーリング海における日間漁獲量分布の深度変化

概要

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1. This report shows the results of the analyses on the records of daily catch during an entire season in 1963 by each of 22 Danish seiners belonging to one of the fish-meal fleets working in the Bering Sea. 2. All the records were treated being classified into three areas according to the difference in locality and date of operation as shown in the first several lines of the second section. Although frequency distribution of daily catch in respective areas showed close approximation to logarithmic normal series, it did not give an exact fit to this series. 3. Stratification of the records into depth zones of 10m interval, or in some of them further stratification into 10 day interval, successfully made the daily catch in each of the strata agreeable to either normal or logarithmic normal series. 4. The frequency distributions of daily catch of the yellowfin sole in respective depth zones in Area A and those of the Alaska pollack in Area B were in general agreeable to logarithmic normal series and those of the Alaska pollack in Area C to normal series. The bathymetric difference in the type of frequency distribution, average and standard deviation of catch are illustrated in Fig. 1.
公益社団法人日本水産学会の論文