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池沼公鱼(Hypomesus OLidus)属鲑形目,胡瓜鱼科(Osmeridae),一年生淡水亚冷水性小型经济鱼类。近年来,北京市密云县沙厂水库池沼公鱼产量变化较大,1992年-1994年产量呈上升趋势,1995年以后产量呈下降趋势。本文研究了影响沙厂水库池沼公鱼产量变化的主要因素,主要包括:人工增殖、饵料、人工捕捞、产卵孵化期水库水位变和竞争者等。提出了提高水库池沼公鱼产量的技术措施,即每年大量放流池沼公鱼受精卵。同时,提出了人工放流池沼公鱼受精卵应注意的问题。人工放流池沼公鱼受精卵应注意的问题是:把握采卵时机,保证数量和质量,设法缩短孵化期,在进入水库上游的亲鱼90%以上成熟时进行人工采卵孵化;放流地点选择在沙石底质、水深不大于5 m,避风向阳的库湾。
Hypomesus OLidus is a salmon-shaped head, the family Osmeridae, and annual freshwater sub-chilled watery commercial fish. In recent years, the production of marsh fish in the pond ponds of Shachang Reservoir in Miyun County, Beijing has been greatly changed. From 1992 to 1994, the production showed an upward trend. After 1995, the output showed a downward trend. In this paper, the main factors influencing the yield changes of the marsh fish ponds in Shachang Reservoir were studied. The main factors include: artificial propagation, feeding, artificial fishing, change of reservoir water level and competitors during spawning incubation. Proposed to improve the production of ponds marsh fish ponds technical measures, that is, a large number of annual discharge pond marsh fish fertilized eggs. At the same time, put forward the artificial release pond marsh fish eggs should pay attention to. Artificial discharge pond marsh fish fertilized eggs should pay attention to the problem is: grasp the timing of eggs, to ensure the quantity and quality, try to shorten the incubation period, enter the upper reaches of the reservoir broodstock 90% mature eggs when hatching artificial; release site selection in the sand Stone quality, water depth of not more than 5 m, sheltered sunny Bay.