Correlation between Yields from Coastal Waters of Hokkaidô

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概要

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• With regard to the yields, namely, Mactra sachalinensis SCHREZCK (A); Pecten (Patino-peeten) yessoensis JAY (B); Anadara inflata (REEVE) (C); Paphia (Ruditapes ?) philippinarum (ADAMS et REEVE) (D)Oyster, mostly Ostrea (Grassostrea) gigas THUNBERG (E); Ear-shell (F); Octopus (G); Sagittated calamary, mostly Ommastrephes sloani pacificus (STEENSTRUP) (H); Sea cucumber (K) and Tangle (Laminaria) (L). from coastal waters of Hokkaidô, a statistical study was made mainly basing on the yearly records issued from the Government Department of Agriculture and Forestry for 26 years from 1911 to '36 (of A and C for 16 years: 1921-'36). Let α and β represent certain yields (or index number of yiel??) respectively, then the percentage: α/α+β × 100 or β/α+β × 100 was calculated in every combination of any two of the ten products and the results are plotted in curves (Fig. 2). In the combinations A and B, A and D, and B and K, the curves are almost horizontal, showing conjoint propagation of those organisms. The influence of water temperature on the amount of the catch of Oyster was statistically analysed; since such organism exists in the critical zone of its distribution in Hokkaidô, it sometimes is enormously influenced by environmental factors. The result proved that the water temperature confines the catch to its rather narrow range.

• 社団法人 日本水産学会の論文

著者

• 久保 伊津男

  水産講習所

関連論文

• Correlation between Yields from Coastal Waters of Hokkaidô
• Statistical Observation on the Yield of the Spiny Lobster, Panulirus japonicus (v. SIEBOLD):II. Yearly Catch in Relation to Precipitation
• Catch of the Salmon in the Miomote River, Niigata Prefecture in Relation to Some Metcorological Factors
• Notes on the Development of a Teleost, Thalassoma cupido (TEMMINCK & SCHLEGEL)

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