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The pressure on the resources and environment of marine ranching has been increasing due to its large-scale construction and rapid development. Marine ranching resources and environmental carrying capacity (RECC) are important for the sustainable development of marine ranching. This paper constructs a marine ranching RECC evaluation index system based on the analysis of the marine ranching RECC system from the pressure-and-support perspective. Also, on the basis of the determination of index weights using the probabilistic linguistic preference relation (PLPR) method, a model to calculate the marine ranching RECC index is introduced and applied to analyzing the RECC states of 11 marine ranching enterprises in Yantai, China. Based on the obtained results, the following conclusions are drawn. First, the RECC of 11 marine ranching enterprises in Yantai is in a severe state on the whole. Second …