Abstract: Fishery industry in Zhangduhu Lake started in 1952. The fish fries were mainly restocked into the lake artificially and they grew naturally in the lake while fishes propagated naturally in the lake as a compensation of the fishery resource. From 1992 to 2004, 279 014.8 kg large sized fingerlings of silver carp and bighead carp were restocked in the lake and the average capture of fish is 755 439 kg annually. The average annual income was 3 329 143.52 RMB. The fishery production varied between 36 691～506 135 kg annually with a fishery production higher than 100 000 kg in 9 years. The problems that hinder the full utilization of the fishery resource in Zhangduhu Lake is the separation of property right and the management right, the dramatic decrease in bottom hydrophytes, the waste of water-chestnut resources, the non-harmonimous measures of fry intake through flood and flood discharge for flood control. In this paper, the authors proposed a sustainable development model for Zhangduhu Lake, which includes the stocking of mainly cultured fish, intensive culture of precious fish species and the overall utilization of the fishery. A series of protection measurements were proposed for Zhangduhu Lake, including optimization of production model to obtain rational utilization of resources, adjustment of production structure to ensure economical development, tight control of pollution to obtain all-around management, enhanced propaganda and management to speed up the recovery of wetland.

Key words: Zhangduhu Lake, wetland, floodin fry from the river, ecological fishery, lakeriver communication, protection countermeasure