| 摘要: |
| 本研究以1986—2016年珠江口海域游泳动物调查资料为基础，统计分析了近30年珠江口海域游泳动物经济物种群落结构变化特征及主要经济物种渔获率之间的相关性分析。结果表明：2000年以前和2000年以后珠江口海域游泳动物经济物种群落结构差异明显，2000年以前游泳动物经济物种种类数量显著高于2000年以后（F=6.711，n=1，p=0.017<0.05）。2000年以前主要游泳动物经济物种有蓝圆鲹（Decapterus maruadsi）、蛇鲻（Saurida filamentosa）、金线鱼（Nemipterus virgatus）、鲐（Scomber japonicus）、银鲳（Pampus argenteus）、灰鲳（Pampus cinereus）以及头足类，其中蓝圆鲹、蛇鲻、金线鱼等10种物种渔获率之间表现为显著相关（p<0.05）；2000年以后的主要经济物种有周氏新对虾（Metapenaeus joyneri）、脊尾白虾（Palaemon carinicauda）、日本蟳（Charybdis japonica）、直额蟳（Charybdist runcata）、凤鲚（Coilia mystus）、锐齿蟳（Charybdis acuta）、亨氏仿对虾（Parapenaeopsis hungerfordi）、口虾蛄（Oratosquilla oratoria），主要渔获率均表现为显著相关（p<0.05）。2000年以前与2000年以后仅有4种优势经济物种相同，游泳动物经济物种群落结构发生了明显变化。 |
| 关键词: 海洋生物学 游泳动物 经济物种 群落结构 渔获率 珠江口海域 |
| DOI：10.3969/J.ISSN.2095-4972.2021.02.007 |
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| 基金项目:南方海洋科学与工程广东省实验室（广州）人才团队引进重大专项资助项目（GML2019ZD0402）；中国科学院南海生态环境工程创新研究院课题资助项目(ISEE2019ZR0) |
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| Community structure characteristics of commercial netkon in the Pearl River Estuary in recent 30 years |
| XU Peng,XIE Mu-jiao,ZHOU Wei-guo,SUN Ying-ting,DING De-wen,SUO An-ning |
| (CAS Key Laboratory of Tropical Marine Bioresources and Ecology, South China Sea Institute of Oceanology, CAS, Guangzhou 510301, China;University of Chinese Academy of Sciences, Beijing 100049, China;CAS Key Laboratory of Tropical Marine Bioresources and Ecology, South China Sea Institute of Oceanology, CAS, Guangzhou 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China) |
| Abstract: |
| In order to explore the characteristics of netkon changes in the Pearl River Estuary in recent 30 years, this paper analyzes statistically the changes in the community structure of commercial netkon and the correlation between the catch rates of main commercial species based on the netkon survey in the Pearl River Estuary from 1986 to 2016. The results showed that the community structure of commercial fishery resources in the Pearl River Estuary before 2000 and after 2000 were quite different. The number of commercial species before 2000 was significantly higher than that after 2000 (F=6.711, n=1, p=0.017<0.05). The main commercial species before 2000 included Decapterus maruadsi, Saurida filamentosa, Nemipterus virgatus, Scomber japonicus, Pampus argenteus, Pampus cinereus and Cephalopods. Among them, the catch rates of 10 species including Decapterus maruadsi, Saurida filamentosa, Nemipterus virgatus and so on correlated significantly (p<0.05). The main commercial species after 2000 were Metapenaeus joyneri, Palaemon carinicauda, Charybdis japonica, Charybdis truncate, Coilia mystus, Charybdis acuta, Parapenaeopsis hungerfordi and Oratosquilla oratoria. The major catches were correlated significantly (p<0.05). Only four dominant commercial species were common before and after 2000, which shows that the community structure of the commercial netkon had changed significantly. |
| Key words: marine biology netkon commercial species community structure catch rate the Pearl River Estuary |
