The Current Situation of Enhancement and Releasing of Crustacean Resources in Zhejiang Coastal Waters

Abstract

As an important part of proliferation and discharge, crustaceans can effectively conserve and supplement fishery resources in natural waters. Based on the data of crustacean proliferation and release in Zhejiang Province from 2017 to 2021 and related literature, this paper systematically reviewed the annual variation trend of crustacean release type and quantity, release capital, and the spatial and quantitative distribution of release area and release specifications. The results show that: from 2017 to 2021, six species of crustacean proliferate in Zhejiang Province, including Penaeus japonicus, Portunus trituberculatus and Penaeus chinensis, etc.. A total of 5220, 455, 000 were released, and the investment was 33, 202, 000 yuan. Among them, the largest amount of release and investment was Japanese prawnaeus, the least amount of release was green crab, and the least amount of investment was Prawnaeus puerarii. The release area involved Wenzhou, Ningbo, Taizhou, Zhoushan and other cities, and the distribution of release was unbalanced between regions, and mainly concentrated in small and medium sizes. In this paper, some specific suggestions will be put forward on problems such as insufficient assessment of the effect of crustacean release species, poor release effect of some proliferating species, and few reserve species of crustacean release in the coastal waters of Zhejiang Province, so as to provide a basis for improving the scientific management of crustacean release species in the future.

Keywords

• enhancement and release
• zhejiang offshore
• crustaceans