摘要
2021年6月、8月、10月在连环湖二八股泡、那什代泡(46°30’~47°3’N,123°59’~124°15’E)6个采样点,利用12种复合网目的刺网采集的467尾河鲈(Perca fluviatilis)样本,研究其生长特性、资源利用程度及资源量现状。结果显示,2个湖泊河鲈的体长与体质量的关系式分别为W=1×10^(-5)L^(3.1271)(R^(2)=0.9683)和W=9×10^(-6)L^(3.1598)(R^(2)=0.9919),属于异速生长;渐近体长分别为409.8 mm、428.2 mm;渐近体质量分别为1478.34 g、1860.39 g;生长系数k均为0.16;拐点年龄分别为6.26 a、6.34 a。当前2个湖泊河鲈资源开发率E分别为0.37、0.48,均小于0.5,表明资源处于轻度开发状态。估算结果显示,二八股泡河鲈资源量约348.66 t,那什代泡河鲈资源量约204.93 t,低龄个体为种群结构的主要组成。综合考虑总死亡系数、捕捞死亡系数、种群残存率及目前资源开发状态,建议减小作业网具网目规格,进一步增加河鲈的捕捞量,以控制外来入侵物种河鲈的种群资源数量。
The growth characteristics,resource utilization factor and resource status were surveyed in 467 samples of perch Perca fluviatilis collected at 6 sample sites in Lianhuan Lake(Erbagu Lake and Nashidai Lake)(46°30’~47°3’N,123°59’~124°15’E)by 12types of gillnets with various meshes in June,August,October 2020.The results showed that the relationships between body weight and body length of the perch in Erbagu Lake and Nashidai Lake were expressed as W=1×10^(-5)L^(3.1271)(R^(2)=0.9683)and W=9×10^(-6)L^(3.1598)(R^(2)=0.9919),which were consistent with allometric growth characteristics.The asymptotic lengths were shown to be 409.8 mm and428.2 mm,the asymptotic weights to be 1478.34 g and 1860.39 g,and the inflection age of the growth curve occurred at 6.26 years and 6.34 years.The growth parameters were all 0.16.The resource development rates of the perch in Erbagu Lake and Nashidai Lake were 0.37 and 0.48,all lower than 0.5,showing the stocks were lightly-exploited.The overall population biomasses of the perch was estimated to be 131.5 tons in Erbagu Lake and 204.93 tons in Nashidai Lake,and the young individuals were the main components of the population structure.Considering the total mortality coefficient,fishing mortality coefficient,population survival rate and current resource development status,it is recommended to reduce the mesh size of operating nets and further increase the catch of the perch to control the population resources.
作者
赵晨
丛艳锋
王乐
宋聃
都雪
张澜澜
孙佳伟
王慧博
黄晓丽
霍堂斌
ZHAO Chen;CONG Yanfeng;WANG Le;SONG Dan;DU Xue;ZHANG Lanlan;SUN Jiawei;WANG Huibo;HUANG Xiaoli;HUO Tangbin(Heilongjiang River Basin Fishery Ecological Environment Monitoring Center,Ministry of Agriculture and Rural Affair,Key Laboratory of Aquatic Organism Protection and Ecological Restoration of Cold Waters,Heilongjiang River Fisheries Research Institute,Chinese Academy of Fishery Sciences,Harbin 150070,China;Fisheries Technical Extension Station of Dulbert Mongolian Autonomous County,Daqing 166200,China;Heilongjiang Provincial Fishery Technical Extension Center,Harbin 150070,China;Dalian Ocean University,Dalian 116023,China)
出处
《水产学杂志》
CAS
北大核心
2022年第6期66-74,共9页
Chinese Journal of Fisheries
基金
国家重点研发计划“蓝色粮仓科技创新”专项“平原湖泊渔业资源养护技术与模式示范”(2020YFD0900501)
农业农村部财政专项“东北地区重点水域渔业资源与环境调查”
关键词
连环湖
河鲈
生长特性
资源评估
Lianhuan Lake
Perca fluviatilis
growth characteristics
stock assessment
