珠江水系鳗鲡资源空间分布特征研究  

THE SPATIAL DISTRIBUTION OF ANGUILLA JAPONICA AND ANGUILLA MARMORATA IN THE PEARL RIVER

作　　者：帅方敏[1] 李新辉[1] 朱书礼[1] 武智[1] 张迎秋 陈蔚涛 刘亚秋[1] SHUAI Fang-Min;LI Xin-Hui;ZHU Shu-Li;WU Zhi;ZHANG Ying-Qiu;CHEN Wei-Tao;LIU Ya-Qiu(Pearl River Fisheries Research Institute,CAFS,Guangzhou 510380,China)

机构地区：[1]中国水产科学研究院珠江水产研究所

出　　处：《水生生物学报》2019年第4期847-853,共7页Acta Hydrobiologica Sinica

基　　金：中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金(2018SJ-ZH05);国家自然科学基金面上项目(31870527);广州市科技计划项目(201804010487)资助~~

摘　　要：研究于2015—2017年对珠江流域12个站位的日本鳗鲡(Anguilla japonica)及花鳗鲡(Anguilla mar-morata)种群资源量与洄游路线等进行了初步调查,并对其资源量状况、空间分布特征与环境影响因素等进行了分析。结果显示在近3年的调查时间里,共采集到日本鳗鲡41尾,平均年龄为(4.2±1.3)龄,93%的个体未性成熟;采集到花鳗鲡12尾,平均年龄为(4.3±1.0)龄,83%的个体未性成熟。日本鳗鲡在珠江水系最远能分布到红水河的合山江段,其在渔获物中的数量百分比与重量百分比均低于百分之一;花鳗鲡最远能分布到西江的石龙江段,其在渔获物中的出现率低于两百分之一。珠江水系鳗鲡野生资源极度匮乏,保护形势十分严峻。同时发现日本鳗鲡空间分布主要受河流分维和河流宽度的影响;花鳗鲡的空间分布主要受河流宽度和水深的影响。该研究是珠江水系野生渔业资源长期调查的一部分,研究结果将对鳗鲡资源的保护和可持续利用具有指导意义。This study analyzed the resources status and spatial distribution of Anguilla japonica and Anguilla marmorata in the Pearl River based on the data collected from 2015 to 2017.A total of 41 Anguilla japonica individuals with the average age of (4.2 ± 1.3) years were collected in these three years,and 93% individuals were sexually immature.A total of 12 Anguilla marmorata individuals with the average age of (4.3 ± 1.0) years were collected and 83% individuals were sexually immature.Anguilla japonica could migrate to the Heshan section of the Hongshuihe River with the percentages in individuals and in weight both less than one percent.Anguilla marmorata could migrate to the Shilong section of the Xijiang River with an occurrence rate less than one in 200.This indicated that the wild Anguilla spp.resources in the Pearl River are extremely rare and need to be protected.Redundancy analysis shown that river fractals and river width play important roles in spatial distribution for Anguilla japonica,while river width and river depth play important roles for Anguilla marmorata.This study is a part of a long-term investigation for the wild Anguilla resources of the Pearl River,and the results could be instructive to the conservation and management of Anguilla resources.

关 键 词：日本鳗鲡 花鳗鲡 资源 空间分布 珠江 RDA 

分 类 号：S932.4[农业科学—渔业资源]