東シナ海・黄海産マダイ資源の研究-IV : 1964年的標識放流調査によつて推定された黄海産マダイの資源量

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Applying the PETERSENs method, the population size of the sea bream in the Yellow Sea was estimated based on: (i) the tagging experiments made November 1964 (1, 608 individuals were recovered out of 13, 342) and (ii) the catch and effort statistics from September 1964 to August 1965. (1) The population size of the sea bream in the Yellow Sea at the middle of November 1964 was estimated at 78.2 million individuals. The 95 per cent confidence limits are roughly 74.6 and 82.3 millions. (2) The rate of exploitation per year, from November 1964 to August 1965, was calculated as 0.25. As the greater part of the catches actually occurred from November through March, this value relates chiefly to this season. (3) Vulnerability of tagged fish coincided well with that of other sea bream, small and baby, caught during this period (Table 4, Fig. 2), indicating the accuracy of the above esti mations.
公益社団法人日本水産学会の論文