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为了揭示金塘岛附近海域渔场鱼类资源特征,利用2009年5月和9月在舟山渔场金塘岛水域获得的渔业资源调查资料,研究金塘岛水域鱼类密度的时空分布,分析种类组成、优势种、种类数和多样性等群落结构等指标的变化特征,分析这些特征所反映这一水域的渔场属性。结果表明:5月和9月鱼类重量和尾数密度分别为47.51kg.km-2、3.44×103ind.km-2和92.50kg.km-2、20.51×103ind.km-2;鱼类重量密度与尾数密度分布趋势基本一致,呈现出近舟山群岛一侧的东部水域鱼类密度高于西部水域的趋势;5月和9月龙头鱼(Harpodon nehereus)是本海域最重要的优势种,几乎为幼体组成,而凤鲚(Coilia mystus)是次要优势种。总体上,两季平均鱼类幼体比例高达86%,显示出这一水域是鱼类的产卵场和育幼场;鱼类种类数夏季高于春季;种类数与多样性的分布格局相似,也是舟山群岛一侧的东部水域鱼类密度高于西部水域。可以认为,近金塘岛一侧海域是经济幼鱼的索饵场。
In order to reveal the characteristics of fish resources in fisheries near the sea near Jintang Island, the spatial and temporal distribution of fish density in the waters of Jintang Island was studied based on the survey data of fishery resources obtained from the waters of Jintang Island in Zhoushan Fishing Ground in May and September 2009, and the species composition , Dominant species, species number and diversity of community structure and other indicators of changes in the characteristics of these characteristics reflect the waters of the fishery properties. The results showed that the fish weights and mantissa densities were 47.51kg.km-2, 3.44 × 103ind.km-2 and 92.50kg.km-2, 20.51 × 103ind.km-2 respectively in May and September. The weight density The distribution trend of the mandarin fish was consistent with that of the mantissa. The density of fish in the eastern waters near the Zhoushan Archipelago was higher than that in the western waters. Harpodon nehereus was the most dominant species in this area in May and September, almost Larvae, while Coilia mystus is the second dominant species. Overall, the percentage of average fish species in the two seasons was as high as 86%, indicating that the waters were the spawning grounds and breeding grounds for fish; the number of fish species in summer was higher than that in spring; the distribution patterns of species number and diversity were similar, The density of fish in the eastern waters on the Zhoushan Islands side is also higher than in the western waters. It can be considered that the area near Jintao Island is a feeding site for economic juveniles.