spawning-biomass per recruit 单位补充量亲体生物量
·2,447,543篇论文数据，部分数据来源于NoteExpress
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。
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