Understanding of factors that explain variation in potential fisheries yields is essential for the ecosystem-based management of lake fisheries. We used mark-recapture and Nordic survey net sampling to obtain estimates of Eurasian perch (Perca fluviatilis) abundance in 28 small (13.3 ha ± 11.4 ha, mean ± S.D.) boreal lakes. A size-structured population model was calibrated for each lake using further individual data to derive estimates of potential yields. Principal component scores formed from physical and chemical environmental parameters and a simple score reflecting the relative photic area of the lakes were then used to explain variation in theoretical yields to identify potential environmental proxies for fisheries management purposes. The estimated mean biomass of perch in the study lakes was 52.4 ± 51.2 kg ha⁻¹, and the maximum sustainable yield, obtained with environment-dependent recruitment size was estimated to be 9.4 ± 12.1 kg ha⁻¹ yr⁻¹. The estimated yields were highest in shallow lakes with good oxygen saturation and with high percentage of euphotic bottom while excess nutrients decreased yields and alkalinity was marginally predictive for catch of large individuals. Our study provides quantitative estimates of potential yields of varyingly sized perch and helps to develop environmentally informed management for small lakes of which some are surprisingly productive.

了解解释潜在渔业产量变化的因素对于基于生态系统的湖泊渔业管理至关重要。我们使用标记重捕和北欧调查网抽样来获得 28 个小型（13.3 公顷 ± 11.4 公顷，平均值 ± 标准差）北方湖泊中欧亚鲈鱼（Perca Fluviatilis）丰度的估计值。使用进一步的个体数据对每个湖泊的规模结构人口模型进行校准，以得出潜在产量的估计值。然后使用由物理和化学环境参数形成的主成分分数以及反映湖泊相对透光面积的简单分数来解释理论产量的变化，以确定用于渔业管理目的的潜在环境指标。研究湖泊中鲈鱼的平均生物量估计为 52.4 ± 51.2 kg ha ^-1，通过依赖于环境的补充规模获得的最大可持续产量估计为 9.4 ± 12.1 kg ha ^-1 yr ^-1。氧饱和度良好且底部透光度高的浅湖的估计产量最高，而营养过剩会降低产量，而碱度对大型个体的捕获量的预测作用不大。我们的研究提供了不同大小鲈鱼潜在产量的定量估计，并有助于为小型湖泊制定环境信息管理，其中一些湖泊的生产力惊人。