Abstract: In recent years, the marine organism resources in coastal areas of China have been declining continuously due to many ongoing problems, such as the  over-use of the marine fishery resources and environment pollution. Artificial enhancement and releasing had become one of the effective methods to repair the fishery resources, in which the biomarker technology of the releasing species is an important mean to evaluate the effect of releasing the fishery. The Coded Wire Tag (CWT) technology, as a kind of internal sign method of fishery biology, has been widely used in the fields of population density, survival rate, stock recruitment assessment and migratory distribution. In this paper, based on a large number of relevant information and research on CWT, the history of the development of the Coded Wire Tag (CWT) technology were mainly introduced, and its application in the biological release of fisheries were briefly described, and its advantages and disadvantages were analyzed. In summary, CWT has the advantages of high marking speed, small damage to the fish, high tagging retention rate and batch marking with low costs; meanwhile, it has the disadvantage of a relatively low recapture rate. With the continuous development of fishery biomarker technology, the CWT will be more widely used in the field of fisheries resources enhancement and releasing, and become one of the development directions for the study of tagging and releasing.

Key words: Coded Wire Tag(CWT), fishery stock enhancement, survival rate, tracking, effectiveness

摘要： 近年来由于海洋渔业资源的过度利用及环境污染等问题不断出现，致使我国近海海洋生物资源不断衰退，开展增殖放流成为修复渔业资源较有效的方式之一，其中放流种类的生物标志技术是评价放流效果的重要手段。金属线码标记（CWT）作为渔业生物体内标志的一种重要方法，已在放流种类种群密度、存活率、资源补充量估算及洄游分布等研究中广泛应用。本文系统整理了国内外开展CWT研究的相关资料，介绍其原理和发展历史，简述在渔业生物增殖放流中的应用，并分析其优势和缺点。综合看来，CWT具有标记速度快、对鱼体损伤小、标记保持率高、批量标记价格低廉等优点，同时也有回捕率较低的缺点。随着渔业生物标志技术的不断发展，CWT在渔业资源增殖放流领域的应用将更广泛，并成为标志放流研究的发展方向之一。

关键词: 金属线码标记, 标志放流, 存活率, 跟踪, 效果