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The recruit population is of much than the surplus population in the spawning stock.
繁殖群体中补充群体多于剩余群体。
The mean weight of fish caught is also dropping, which worries the research institute greatly, though the biomass of spawning stock has increased slightly since 1985.
被捕获的鱼的平均重量也在减小，这正是研究机构大为担忧的，尽管产卵鱼的总存量从1985年以来已略微增加。
Fuzzy mathematic method was used to analyze the age composition of spawning stock of yellow croaker of-shore Xiamen. This paper calculated the degree of low-age in 1980-1984.
本文应用模糊数学方法分析了厦门海区大黄鱼生殖群体的渔获年龄组成，计算了1980—1984年厦门海区大黄鱼的低龄度。
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