水母旺发对珠江口鱼类资源量的影响

发布时间：2018-03-18 16:33

本文选题：水母　切入点：珠江口　出处：《热带海洋学报》2016年06期 　论文类型：期刊论文

【摘要】：水母作为胶质浮游动物的一大类群,与其他浮游动物和鱼类有着复杂的食物联系,在海洋食物网中占有相当重要的地位。2015年11月对珠江口环境特征、水母种群组成和鱼类资源进行现场调查,共鉴定出11种水母,其中花水母目和软水母目各有4种,优势种为球形侧腕水母(Pleurobrachia globosa);共鉴定出17种鱼类,其中鲈形目种数最多(10种)。珠江口各站位鱼类资源渔获量呈现自北向南先升高,再降低,然后逐渐升高的趋势,与浮游动物丰度和表层叶绿素a浓度分布有着较大差异。珠江口北部S1站水母类丰度为213个×m~(-3),其中球形侧腕水母占水母类丰度的99%,而该站鱼类资源渔获量仅为7.8g×h~(-1),这很可能与水母类旺发有关。水母丰度与氮磷比正相关,与渔获量负相关,但相关性均不显著,因此水母旺发对珠江口鱼类资源的影响机制仍需进一步研究。
[Abstract]:As a large group of glial zooplankton, jellyfish have complex food relations with other zooplankton and fish, and play an important role in the marine food web. 11 species of jellyfish were identified by field investigation, including 4 species of jellyfish and 4 species of soft jellyfish. The dominant species were Pleurobrachia globosaanus, 17 species of fish were identified. Among them, the largest number of perch species was 10 species. The catch of fish resources in the Pearl River Estuary increased first from north to south, then decreased, and then increased gradually. The abundance of jellyfish in S 1 station in the northern Pearl River Estuary is 213 脳 m ~ (-1) ~ (-3), of which the spherical side carpal jellyfish is 99% of the abundance of jellyfish, but the fish catch of this station is only 7.8g 脳 hmc-1, and the distribution of chlorophyll a is different from that of zooplankton and the distribution of chlorophyll a in the surface layer, and the abundance of jellyfish in S _ 1 station is 213 脳 m ~ (-1). This is probably related to the flourishing of jellyfish. The abundance of jellyfish is positively related to the ratio of nitrogen to phosphorus. There is a negative correlation with the catch, but the correlation is not significant. Therefore, the mechanism of the effect of jellyfish on the fish resources in the Pearl River Estuary still needs to be further studied.
【作者单位】：中国水产科学研究院南海水产研究所广东省渔业生态环境重点实验室农业部南海渔业资源开发利用重点实验室;
【基金】：广州市科技计划项目珠江科技新星专项(2014J2200020) 国家重点基础研究发展计划(2015CB452904) 广东省自然科学基金项目(2015A030313785)~~
【分类号】：S931

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