To investigate the efficiency level of marine ranching in the process of ecological management and the balance between the economy and ecology, we proposed a comprehensive index system based on the entropy weight method and measured the Marine Ranching Ecological Efficiency (MREE) of 18 marine ranches in Shandong Province through the Super-SBM model. On the basis of MREE scores, we divided the marine ranches into high-efficiency, medium-efficiency and low-efficiency marine ranches and carried out a comparative analysis. Then, we performed a cause analysis of the efficiency loss. The results showed that the mean of the MREE scores was 0.6; the best-practice marine ranching had an MREE score of 1.877 while the worst one had an MREE score of 0.0645, wherein the Pure Technical Efficiency (PTE) score was the key dimension between the decomposition efficiency scores of MREE scores respected by the Technical Efficiency (TE) scores. The result indicates that the redundancy of inputs and undesirable outputs and the deficiency of ecological outputs are major causes of loss of MREE, which reflects inefficient resource allocation efficiency, deficient government and technical support, and inadequate habitat construction and risk prevention of these marine ranches.

为考察海洋牧场在生态管理过程中的效率水平和经济与生态之间的平衡，我们提出了基于熵权法的综合指标体系，并测量了18个海洋牧场的海洋牧场生态效率（MREE）。山东省通过Super-SBM模式。根据MREE评分，我们将海洋牧场分为高效、中效和低效海洋牧场，并进行了对比分析。然后，我们对效率损失进行了原因分析。结果表明，MREE 得分的平均值为 0.6；最佳实践海洋牧场的 MREE 分数为 1.877，而最差的海洋牧场的 MREE 分数为 0.0645，其中纯技术效率（PTE）分数是技术效率（TE）分数所尊重的MREE分数分解效率分数之间的关键维度。结果表明，投入和不良产出的冗余和生态产出的不足是造成MREE损失的主要原因，反映了这些海洋牧场的资源配置效率低下、政府和技术支持不足、栖息地建设和风险防范不到位。