PRODUCTION OF FISH POPULATIONS IN LAKES
PRODUCTION OF FISH POPULATIONS IN LAKES
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DOI：
10.1139/f93-013
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发表时间：
1993-01-01
影响因子：
2.4
通讯作者：
PLANTE, C
中科院分区：
文献类型：
--
作者：
DOWNING, JA;PLANTE, C
从文献中收集了来自世界各地38个湖泊的100个鱼类种群的生物产量估计数。鱼类种群的年产量（P，千克每公顷每年），年平均站立生物量（B，千克每公顷），和最大个体体重（W，克）之间的关系约为log 10 P = 0.32 + 0.94 log 10 B- 0.17 log 10 W（R2 = 0.84）。这种关系类似于在无脊椎动物种群中观察到的关系，并表明P随W而下降。长轴回归分析表明，P/B：W关系具有与异速生长理论预测相似的指数。从这个多变量方程的残差表明，鱼类生产与温度，湖泊磷浓度，叶绿素a浓度，初级生产，并与pH值呈正相关。结果表明，一般自下而上控制湖泊生态系统组成部分。形态土壤指数不是一个很好的预测鱼类种群的生产。假设可持续产量约为产量的10%，则所分析的大多数鱼类种群的可持续产量将低于现存生物量的15%。被开发的人口被发现是约70%的生产力，平均而言，比未开发的人口相同的常设生物量和身体质量。
Biological production estimates of 100 fish populations from 38 lakes worldwide were gathered from the literature. The relationship between the annual production of fish populations (P, kilograms per hectare per year), annual mean standing biomass (B, kilograms per hectare), and maximum individual body mass (W, grams) was approximately log10P = 0.32 + 0.94 log10B - 0.17 log10W (R2 = 0.84). This relationship is similar to one observed for lotic invertebrate populations and shows that P declines with W. Major axis regression indicated that the P/B:W relationship had an exponent similar to that predicted by allometric theory. The residuals from this multivariate equation suggest that fish production is positively correlated with temperature, lake phosphorus concentration, chlorophyll a concentration, primary production, and with pH. The results suggest a general bottom-up control of lake ecosystem components. The morphoedaphic index is not a good predictor of the production of fish populations. Assuming that sustainable yield is about 10% of production, sustainable yield would be less than 15% of the standing biomass for the majority of fish populations analyzed. Exploited populations were found to be about 70% more productive, on average, than unexploited populations of the same standing biomass and body-mass.