舟山渔场衢山岛海域春夏季鱼类数量变化  

On the quantitative change of the fish in the sea area of Qushan island during spring and summer

作　　者：陈华[1,2] 徐兆礼[1] 

机构地区：[1]中国水产科学研究院东海水产研究所,农业部海洋与河口渔业重点开放实验室,上海200090 [2]上海海洋大学海洋科学学院,上海201306

出　　处：《海洋渔业》2009年第2期179-185,共7页Marine Fisheries

基　　金：国家自然科学基金重大研究计划(90511005)

摘　　要：利用2008年3月和6月衢山岛海域渔业资源调查资料,研究衢山岛海域鱼类种类组成和多样性的变化,分析主要优势种密度对鱼类总密度的贡献率。结果表明,两个航次拖网调查,共鉴定鱼类30种,其中暖温种15种,暖水种13种。3月的鮸和刀鲚,6月的六丝矛尾虾虎鱼分别是本海域较重要的优势种。3月和6月鱼类重量密度分别为125.05 kg/km2和95.01 kg/km2,尾数密度为8.41×103ind/km2和37.74×103ind/km2。鱼类重量密度与尾数密度分布趋势一致,呈现调查水域南部高于北部的分布趋势。依据贡献β值,衢山岛海域鱼类数量的变化与主要优势种数量变化有关。鱼类的种类组成与水团有着密切关系。Based on the data taken from two fishery resource surveyings in the sea area of Qushan island in March and June 2008, this paper dealed with the seasonal change of fish composition and diversity; analyzed the contribution the dominant species made to total fish density. There were altogether 30 species, among them 15 were warm temperate species, and 13 were warm water species. Miichthys miiuy and Coilia ectenes were domanant species in March, and Amblychaeturichthys hexanema was dominant species in June. The weight density was 125.05 kg/km^2 and individual density was 8.41 × 103 ind/km^2 in March, and 95.01 kg/km^2 and 37.74 ×103 ind/km^2 in June. Both the weight and individual distributions showed the same tendency that the densities of the south area were higher than that of the north area in the surveying waters. Based on the value ofβ, We come to the conclusion that the change of fish density was related with the change of the main dominant species density;and the composition of species was closely related with the water masses.

关 键 词：衢山岛海域 鱼类 优势种 种类组成 

分 类 号：S931[农业科学—渔业资源]