POPULATION STUDIES OF SAND EEL, AMMODYTES PERSONATUS, IN ISE BAY I.GROWTH AND ITS RELATION TO POPULATION DENSITY

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  • 伊勢湾におけるイカナゴ個体群の研究 : I.個体群密度と成長の関係
  • 伊勢湾におけるイカナゴ個体群の研究-1-個体群密度と成長の関係〔英文〕
  • イセワン ニ オケル イカナゴ コタイグン ノ ケンキュウ 1 コタイグン ミ

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Abstract

The annual fluctuation of growth of sand eel collected from 1968 to 1977 was studied in relation to the population density in Ise Bay. There was no apparent sex difference in the growth in the first and second years of life. The population was divided into two groups, age 0 and 1 groups, based on the distribution of body length. Biweekly mean body length and mean body weight for each year-class remarkably fluctuated every year. A considerable yearly variation occurring in the growth was in close connection with the fluctuation of population density of age 0 group. A highly significant negative correlation existed between the growth in weight and the population density.

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