基于ELEFANⅠ和LBB的竺山湖贝氏䱗资源状况评估  

Assessment of the stock status of Hemiculter bleekeri in the Zhushan Lake based on the ELEFANⅠand LBB methods

作　　者：叶学瑶 赵旭昊 任泷 任可成 徐东坡 YE Xueyao;ZHAO Xuhao;REN Long;REN Kecheng;XU Dongpo(National Demonstration Center for Experimental Fisheries Science Education,Shanghai Ocean University,Shanghai 201306,China;Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River,Ministry of Agriculture and Rural Affairs,Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences,Wuxi 214081,China)

机构地区：[1]上海海洋大学水产科学国家级实验教学示范中心,上海201306 [2]中国水产科学研究院淡水渔业研究中心,农业农村部长江下游渔业资源环境科学观测实验站,江苏无锡214081

出　　处：《中国水产科学》2021年第6期751-761,共11页Journal of Fishery Sciences of China

基　　金：国家重点研发计划项目(2019YFD0900604,2020YFD0900503);中国水产科学研究院科技创新团队专项项目(2020TD61)。

摘　　要：为获得竺山湖水域贝氏䱗(Hemiculter bleekeri)的种群参数,评价其资源利用状况,根据2019年10月至2020年9月在竺山湖水域收集的贝氏䱗基础生物学数据,利用基于长度频率数据的ELEFANⅠ(electronic length frequency analysisⅠ)和贝叶斯评估方法(length-based Bayesian biomass,LBB)估算其种群参数。结果显示,贝氏䱗体长范围为44.17~181.87mm,体重范围为0.88~70.30g;体长(L,mm)与体重(W,g)关系式为W=9.0×10^(-5)L^(3.0707)(R^(2)=0.8775,n=805);体长和体重的生长方程分别为L_(t)=194.25×[1-e^(-0.36(t+0.46))],Wt=95.74×[1-e^(-0.36(t+0.46))]^(3.0707)。运用ELEFANⅠ方法估算的相对自然死亡系数M/K=2.28,相对捕捞死亡系数F/K=4.50,相对总死亡系数Z/K=6.78,开发率E=0.66。LBB估算的相对死亡系数M/K、F/K、Z/K和开发率E分别为1.88、5.78、7.64和0.76。两种方法估算的种群参数基本一致。本研究揭示了竺山湖贝氏䱗的种群生长特性及资源利用状况,可为太湖的渔业资源科学管理提供依据。Utilizing the basic biology data of Hemiculter bleekeri collected from October 2019 to September 2020 in Zhushan Lake,this study aimed to explore the population parameters of H.bleekeri in the Zhushan Lake and to thereby evaluate the utilization of resources using Electronic Length Frequency AnalysisⅠ(ELEFANⅠ),based on the length of frequency data and length-based Bayesian biomass(LBB).The results show that the length range of H.bleekeri is 44.17–181.87 mm;the weight range is 0.88–70.30 g;the relationship between body length and body weight can be expressed as W=9.0×10^(–5)L^(3.0707)(R^(2)=0.8775,n=805);and the growth equation of body length and weight can be described respectively as:L_(t)=194.25×[1–e^(–0.36(t+0.46))],W_(t)=95.74×[1^(–e–0.36(t+0.46))]^(3.0707).According to the estimation by ELEFANⅠ,the relative natural mortality is M/K=2.28;the relative fishing mortality is F/K=4.50;the relative total mortality is Z/K=6.78;and the exploitation rate is E=0.66.According to the estimation by LBB,M/K,F/K,Z/K,and exploitation rate E are 1.88,5.78,7.64,and 0.76,respectively.The results of this study can not only fill the knowledge gap regarding the population growth characteristics and resource utilization of H.bleekeri in Zhushan Lake,but also provide a basis for scientific management of fishery resources in Taihu Lake.

关 键 词：贝氏䱗 长度频率 种群参数 资源利用 竺山湖 大水面 生态渔业 

分 类 号：S931[农业科学—渔业资源]