《F/Z=F/F+M=■/(■+■)表达什么生物学概念?》的作者,针对《捕捞对世代数量的影响》一文的第一部分提出了不同的意见,争论的焦点是Beverton-Holt模式中的“捕获尾数在死亡尾数中所占的比例”问题。后者用数学推导方法证明这一比例等于F/F+M;前者则论证这一比例不涉及F/F+M。本着“百家争鸣”的方针,本报刊载了刘长安同志的文章,供大家讨论。 The author of “What F / Z = F / F + M = ■ / (■ + ... ■) ■” put forward different opinions on the first part of the article “The impact of fishing on the number of generations” The focus is on the issue of “the fraction of capture mantissa in the death mantissa” in Beverton-Holt mode. The latter mathematically deduced that this ratio is equal to F / F + M; the former argues that this ratio does not involve F / F + M. In line with the principle of “a hundred schools of thought contend,” this newspaper published an article by Comrade Liu Changan for discussion.