| 北部湾金线鱼的数量分布及变化趋势 |
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| 引用本文： | 彭露,徐姗楠,蔡研聪,许友伟,孙铭帅,陈作志,张魁,粟丽.北部湾金线鱼的数量分布及变化趋势[J].海洋湖沼通报,2020(4):120-126. |
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| 作者姓名： | 彭露 徐姗楠 蔡研聪 许友伟 孙铭帅 陈作志 张魁 粟丽 |
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| 作者单位： | 中国水产科学研究院南海水产研究所;上海海洋大学;南方海洋科学与工程广东省实验室（广州） |
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| 基金项目： | 农业财政专项“南海北部近海渔业资源监测”(2014—2018);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(GML2019ZD0605);中国水产科学研究院南海水产研究所基本科研业务费(2019TS22)资助。 |
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| 摘 要： | 根据2014年7月~2015年5月进行的四个航次底拖网渔业资源调查数据,分析了北部湾金线鱼(Nemipterusvirgatus)的数量分布特征。结果表明,北部湾金线鱼主要出现在40~100 m水深海域,以80~100 m水深出现频率最高。北部湾金线鱼数量分布存在季节和空间变化,秋季资源密度较其他三个季节低(春季:1.33 kg/km^2;夏季:1.34 kg/km^2;秋季:0.72 kg/km^2;冬季:2.32 kg/km^2),资源密度高值区主要出现在湾中部,与其产卵习性相关。分析表明,水深、底层温度和底层盐度是影响金线鱼资源分布的主要原因,但影响因子存在季节差异。与历史调查资料对比发现,50年间金线鱼资源密度波动较大,总体呈下降趋势,亟需加强保护。
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| 关 键 词： | 金线鱼 资源密度 数量分布 北部湾 |
Quantitative distribution of Nemipterusvirgatus in Beibu Gulfand its dynamics |
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| PENG Lu,XU Shannan,CAI Yancong,XU Youwei,SUN Mingshuai,CHEN Zuozhi,ZHANG Kui,SU Li.Quantitative distribution of Nemipterusvirgatus in Beibu Gulfand its dynamics[J].Transaction of Oceanology and Limnology,2020(4):120-126. |
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| Authors: | PENG Lu XU Shannan CAI Yancong XU Youwei SUN Mingshuai CHEN Zuozhi ZHANG Kui SU Li |
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| Institution: | (South China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Key Laboratory of South China Sea Fishery Resources Exploitation&Utilization,Ministry of Agriculture and Rural Affairs,Guangdong Provincial Key Laboratory of Fishery Ecology and Environment,Guangzhou 510300,China;National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China) |
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| Abstract: | Based on the data of four seasonal surveys during a period from 2014 to 2015 by bottom trawl in Beibu Gulf,the quantity distribution characteristics of Nemipterusvirgatuswas analyzed.The results showed that N.virgatus in Beibu Gulf mainly appeared in 40~100 m water depth,and the frequency was found to be higher at 80~100 m water depth than other water layers.There are seasonal and spatial changes in the quantity distribution of N.virgatus in Beibu Gulf.The stock density in autumn is lower than that in other three seasons(spring,1.33 kg/km^2;summer,1.34 kg/km^2;autumn,0.72 kg/km^2;winter,2.32 kg/km^2).The high value area of stock density mainly appears in the middle of the gulf,which is related to its spawning habits.Stepwise regression analysis showed that water depth,bottom temperature and bottom salinity are the main reasons affecting the distribution of N.virgatus stock density,but there are seasonal differences in influencing factors.Compared with the historical survey data,it is found that the stock density of N.virgatusis fluctuating greatly over last 50 years,and the overall trend is that the density has been decreasing.It is urgent to strengthen the protection of the resource. |
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| Keywords: | Nemipterusvirgatus stock density quantitative distribution Beibu Gulf |
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