中文摘要：

根据2009年8月—2013年8月莱州湾海域渔业拖网调查数据,分析该海域渔业种群组成、优势种、空间分布和资源量的年际变动,以了解黄河入海泥沙通量对莱州湾渔业结构的影响。结果表明：（1）莱州湾渔业资源量整体呈下降趋势,主要以鱼类为主,甲壳类次之,头足类最少;鱼类中以中上层鱼类为主,网获量明显多于底层鱼类,但2011年8月底层鱼类稍多于中上层鱼类;（2）莱州湾渔业资源各年份的优势种有所变动,中上层鱼类和底层鱼类的优势种变动较大,甲壳类优势种变动较少,鱼类优势种组成存在年际更替现象,主要由经济价值高、个体大的种类向经济价值低、个体小的种类演替。主要优势种集中于斑、矛尾虎鱼、口虾蛄、小带鱼和日本枪乌贼等种类。2010年斑大量暴发,为唯一优势种;（3）2009—2013年黄河入海泥沙年际通量与鱼类种数、底层鱼类数和渔业资源数存在显著相关性,与底层鱼类生物量存在极显著相关性。综上所述,黄河入海泥沙年际通量的变动对莱州湾渔业资源量和资源结构都产生了一定影响。

英文摘要：

Based on the data by traw l surveys in August from 2009 to 2013 in the Laizhou Bay,we studied the fishery resources structures,such as species compositions,dominant species,spatial distribution and standing stock,to understand the effects of annual sediment flux from the Yellow River on the fishery resources structures in the Laizhou Bay. The result show ed：（ 1） The relative biomass and species of fishery varied dramatically in interannual variation. Average catch of fish was more than those of crustaceans and cephalopods. And the catch of pelagic fish was significantly more than that of demersal fish,but the opposite phenomenon occurred in Aug. 2011.（ 2） The composition of dominant species was close to interannual variation,conducting succession from species which w ere high economic value and big to low er economic value and small species. The dominant species were different among 2009- 2013. Main dominant species were Konosirus punctatus,Chaeturichthys stigmatias,Oratosquilla oratoria,Eupleurogrammus muticus and Loligo japonica. K. punctatus became the only dominant specie in 2010.（ 3） The Yellow River exports large amount of nutrients to the Laizhou Bay. The estuary of Yellow River and its adjacent area,a major fishery and spaw ning ground,have abundant species. The changes of sediment discharge from the Yellow River had effects on fishery resources structures and quantity of resources. The sediment discharges were significantly correlated with the number of fish species or demersal fish and the fishery resources. And the Yellow River sediment discharge was high significantly correlated with the biomass of demersal fish. In conclusion,the influence of the Yellow River sediment discharge into Laizhou Bay is an indispensable factor when we study the fishery resources and protect the larvae and juveniles.