双频识别声呐在鱼类资源调查中的应用进展

Advances in Application of Dual-frequency Identification Sonar(DIDSON)to Fish Resources Survey

介绍双频识别声呐(Dual-frequency Identification Sonar,DIDSON)的工作原理、图像后处理,国内外应用领域和研究现状.通过国内外的研究实验,探讨DIDSON使用过程中影响鱼类资源定量评估、鱼类个体体长探测的重要因素及问题处理办法.在此基础之上,分析DIDSON在改善鱼类种类鉴别方面的优势.探讨DIDSON在渔业资源调查应用过程中的不足并对DIDSON在实际过程中的应用进行展望,以期对DIDSON的应用提供一些参考.

This paper introduces the dual-frequency identification sonar（DIDSON）;the working principle,post-processing of images,application fields and present status of studies at home and abroad are discussed.Through the domestic and foreign research results,the important factors that affect fish resources quantitative assessment and fish body length in the use process and treatment measures,are discussed.On this basis,the advantages of the DIDSON in improving the status of fish species identification are analyzed.Finally,some problems and prospects of DIDSON in fisheries resources survey discussed in order to provide better information for the application of DIDSON.