摘要
利用2007年12月和2008年6月三门湾海域渔业资源调查资料,研究三门湾鱼类密度的时空分布,分析优势种、地形地貌和水文等因素对鱼类分布的影响。结果表明:12月和6月鱼类重量和尾数密度分别为51.47 g/km2、4.62(103ind./km2)和175.32 g/km2、28.88(103ind./km2)。12月的矛尾虾虎鱼(Chaeturichthys stigmatias),6月的莱氏舌鳎(Cynoglossus(Areliscus)lighti)和小黄鱼(Larimichthys polyactis)分别是本海域最重要的优势种。去除个别鱼类的影响,鱼类重量密度与尾数密度分布趋势基本一致,呈调查水域密度东南部水域高于西北部水域的趋势。两季平均幼体比例高达63.74%,且大部分属于体型较小的鱼类。夏季鱼类比冬季种类数有所增加。三门湾鱼类数量的变化动力来自主要优势种对鱼类数量变化的回归贡献。
Based on the data from two oceanographic censuses in the Sanmen Bay during Sept. 2007 and June 2008, this paper discussed the spatial-temporal distribution of fish density involved in some impact factors such as dominant species, background of topography and geomorphy, as well as hydrological features. Results showed that weight density was 51.47 （kg/km^2） and individual density was 4.62 （10^2 ind./km^2） in Sep. , 2007, and 175.32 （kg/km^2） and 28. 88 （10^3 ind./ km^2） in June 2008. Chaeturichthys stigmatias in September and Cynoglossus （Areliseus） lighti and Larimichthys polyactis in June were the most dominant species were critical in the fish dynamics. Excluding the impact of individual fish. Both weight and individual distribution showed same tendency higher in the southeast area and lower in the northwast area of the Sanmen Bay. The percent of young fishes was 63.74% and most of the fishes were small size fishes in these waters. Species number in June was higher than in September. The abundance variation of dominant species and its contribution to fish density were important.
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2009年第2期198-205,共8页
Journal of Shanghai Ocean University
基金
国家自然科学基金项目(No.40776047)
关键词
三门湾
鱼类
优势种
密度
Sanmen Bay
fish
dominant species
density
