室内循环水鳗鱼高密度苗种培育技术.pdf

Ecology and annual recruitment levels of Japanese eel in continent China Guan Ruizhang Fisheries College, Jimei University, Xiamen 361021, China Engineering Research Centre of Eel Modern Technical Industry, Ministry of Education, Xiamen 361021, China 2012年10月20日 集美大学 1. Introduction Glass eels (Anguilla japonica) arrive in the all estuaries of continent China from November to April every year. The main catches are from the estuaries of Jiangsu province, Shanghai manicipal Zejiang province, Fujian province, Guangdong province. 集美大学 2. Total annual catchment The total annual catch of glass eels in the continent China has gradually decreased from more than 50 metric tons to less than 20 metric tons in the recent 32 years 集美大学 3. The cause for the decline of catch The causes for the decreasing catch of the glass eels should be mainly due to: Environment pollution; Over fishing of glass eels; Lacking policy and poor management; Other environmental factors; … 集美大学 4. How To guarantee the sufficient recruitment of the glass eels Following measures should be taken: (1) Strengthening the environment protection and water pollution control (2) Making more scientific fishing forbidden period & a maximum fishing quantity of glass eels (3)Forbidding commercial fishing the growing eels and catadromous eels; (4) Reasonably exploiting the other eel species for aquaculture; (5) Enduringly studying on the artificial propagation of A. japonica . 集美大学 (1) Strengthening the environment protection and water pollution control Severe water pollution by indus