为探明循环水养殖环境下的鱼类个体大小分化机制，本项目以加州鲈幼鱼为研究对象，针对循环水养殖环境下影响鱼类个体生长的鱼群游泳策略博弈的相关基础理论进行研究，旨在构建适用于循环水养殖环境下的加州鲈幼鱼鱼群游泳策略博弈模型。本项目研究内容包括：在鱼群个体摄食福利和游泳能耗跟踪量化的基础上，利用动态博弈理论和个体社群等级特征，对鱼群个体间的游泳策略博弈规律进行探索；结合鱼群个体的长期生理指标特征以及个体间的行为交互特征，求解鱼群个体间的游泳策略博弈均衡；研究养殖密度、社群等级结构、水体流速以及饥饿程度对鱼群个体间游泳策略博弈规律及其均衡的影响；协同利用递归神经网络和强化学习技术实现鱼群游泳策略博弈的精准量化分析，构建鱼群游泳策略博弈模型。项目预期成果不仅将有助于循环水养殖鱼类个体大小分化机制的解析，还将有助于循环水养殖环境下鱼类高效分级和高效投喂方案的决策。

In order to disentangle the differentiation mechanism of individual size among fishes in recirculating aquaculture systems, the relevant basic theories of the swimming strategic games among fish school, which affecting individual growth, are studied in this project using juvenile Micropterus salmoides. And the purpose of this project is to construct a model for the swimming strategic games among the juvenile Micropterus salmoides in recirculating aquaculture systems. The research contents of this project include: exploring the rules of the swimming strategic games among individuals in a fish school, using the dynamic game theory and individual social hierarchy, based on the tracking and quantization of the feeding welfare and swimming cost of individuals; seeking the equilibria of the swimming strategic games among individuals in a fish school, with the help of the characteristic of the long-term physiological indexes of fish individuals and the characteristic of the behavioral interactions between fish individuals; studying the effects of density, structure of social hierarchy, flow velocity and hunger level on rules and equilibria of the swimming strategic games among individuals in a fish school; realizing the precise quantitative analysis of the swimming strategic games among the fish school through the coordinated use of the recurrent neural network and reinforcement learning, and then constructing the model for the swimming strategic games among the fish school. This project is based on the field test data and carried out using the methods of the theoretical analysis and model fitting. The expected results of this project will not only help uncover the differentiation mechanism of individual size among fishes in recirculating aquaculture systems, but also contribute to the scheme decisions of the high-efficient size grading and feeding in recirculating aquaculture systems.