基于体长频率数据的西江封开段赤眼鳟可捕规格与资源保护研究  

Research on catchable size and resource protection of Squaliobarbus curriculus in Xijiang River Fengkai section based on length-frequency data

作　　者：朱书礼[1] 李跃飞[1] 武智[1] 李捷[1] 夏雨果[1] 杨计平[1] 李新辉[1] ZHU Shuli;LI Yuefei;WU Zhi;LI Jie;XIA Yuguo;YANG Jiping;LI Xinhui(Pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences/Scientific Observing and Experimental Station of Fishery Resources and Environment in the Middle and Lower Reaches of Pearl River,Ministry of Agriculture and Rural Affairs,Guangzhou 510380,China)

机构地区：[1]中国水产科学研究院珠江水产研究所/农业农村部珠江中下游渔业资源环境科学观测实验站,广东广州510380

出　　处：《南方水产科学》2020年第4期1-7,共7页South China Fisheries Science

基　　金：国家重点研发计划“蓝色粮仓科技创新”(2018YFD0900903);珠江渔业资源调查与评估创新团队项目(2020TD10,2020ZJTD-04)。

摘　　要：该研究于2014年在西江封开段进行了8个月的渔获物调查,采集了526尾赤眼鳟(Squaliobarbus curriculus)的体长、体质量等生物学信息,利用体长频率分布估算赤眼鳟生长、死亡参数,并分析渔业资源利用状况。结果显示,赤眼鳟体长-体质量的幂函数关系参数a=0.028 8,b=2.858 2。von Bertalanffy生长参数渐近体长L_(inf)=74 cm,生长系数K=0.1,自然死亡系数M=0.19,总死亡系数Z=1.51,捕捞死亡系数F=1.32,开发率E=0.88。渔业资源量分析显示,2014年西江封开段赤眼鳟资源量为2 234 652尾、428.558 t。单位补充量渔获量(Yield per recruit, YPR)模型分析显示,当前赤眼鳟首次开捕体长为12.3 cm,F为1.32,YPR为1.89 g;当首次开捕体长调整为27.8 cm、F调整为0.45时,可获得YPR 7.76 g。当前赤眼鳟资源处于过度开发状态,建议将开捕体长设为27.8 cm,将捕捞强度降至0.45。We conducted an eight-month catch survey in 2014 and collected 526 individuals of Squaliobarbus curriculus.Based on their body length and mass,we estimated the biological stock characteristics(growth and mortality parameters)and assessed the stock size and status of S.curriculus.The length-mass relationship was fitted by a power function(a=0.0288,b=2.8582).The von Bertalanffy growth parameters were estimated:the asymptotic length Linf was 74 cm;the growth coefficient K was 0.1;the natural mortality coefficient M was 0.19;the total mortality coefficient Z was 1.51;the fishing mortality rate was as 1.32;the exploitation rate was 0.88.In 2014,the size of the stock in numbers and biomass were 2234652 individuals and 428.558 t,respectively.Results of the yield per recruit(YPR)modeling shows that the current length at first capture was 12.3 cm;the fishing mortality rate was 1.32;the current YPR was 1.89 g.When the length at first capture was 27.8 cm and the fishing mortality rate was 0.45,the YPR was 7.76.The current stocks of S.curriculus have been over-exploited.It is suggested that the length at first capture should be 27.8 cm,and the fishing mortality rate should be 0.45.

关 键 词：赤眼鳟 体长频率 可捕规格 资源保护 西江封开段 

分 类 号：S932.4[农业科学—渔业资源]