摘要
2018年1月—12月,根据《全国淡水生物物种资源调查技术规定(试行)》中底栖动物物种资源调查方法,在建瓯建溪细鳞斜颌鲴国家级水产种质资源保护区内设12个站位,调查该区内耳河螺Rivularia auriculata的种群动态变化,为耳河螺资源的合理利用与保护提供基础数据。调查期间共采集到耳河螺样本2012个,年均密度和生物量分别为0.331 ind./m^(2)和0.793 g/m^(2),离北津电站大坝越近密度和生物量越低。耳河螺壳长和湿体质量范围分别为7.41~36.34 mm和0.128~8.169 g,壳长和体质量关系为W=0.0007L^(2.648)(R^(2)=0.946,P<0.05),呈负异速生长。FISAT II软件对耳河螺的生物学参数及生长特性等的分析表明:基于von Bertalanffy季节性生长方程计算的生长参数为:L_(∞)=39.15mm,K=0.77,C=0.84,WP=0.12,表明耳河螺生长有明显的季节性波动;耳河螺总死亡系数Z为6.03,自然死亡系数M为1.68,捕捞死亡系数F为4.35;开发率E为0.72,表明耳河螺处于过度开发状态,需要及时保护耳河螺资源。
The population dynamics of river snail(Rivularia auriculata)were investigated in twelve stations set up in National Aquatic Germplasm Resource Reserve of Xenocypris microlepis area in Jianxi,Jian'ou,from January to December in 2018,according to the survey method of benthic animal species resources in the"National Freshwater Biological Species Resource Survey Technical Regulations(Trial)to provide basic data for the rational utilization and protection of the river snail resources.A total of 2012 samples were collected during the investigation,with mean annual abundance of 0.331 ind./m^(2) and biomass of 0.793 g/m^(2).The abundance and biomass of the river snail were shown to be decreased where the sampling sits were closer to the dam.The river snail had shell length(L)ranging from 7.41 to 36.34 mm and wet body weight(W)varying from 0.128 g to 8.169 g,with calculated L-W equation of W=0.0007L^(2.648)(R^(2)=0.946,P<0.05),showing negative allometric growth.Fisat II software analyses indicated that the growth was expressed as von Bertalanffy growth model of L_(∞)=39.15 mm,K=0.77,C=0.84,WP=0.12,with obvious seasonal oscillation.It was found that the total mortality(Z)was 6.03,natural mortality(M)1.68 and fishing mortality rates(F)4.35.The explotation rate(E=0.72)indicated an overexploitation that resource protection of river snail Rivularia auriculata is urgently needed.
作者
邹丽珍
崔利峰
蒋奕雄
高山
何美峰
ZOU Lizhen;CUI Lifeng;JIANG Yixiong;GAO Shan;HE Meifeng(Freshwater Fisheries Research Institute of Fujian Province,Fuzhou 350002,China)
出处
《水产学杂志》
CAS
北大核心
2021年第1期54-59,共6页
Chinese Journal of Fisheries
基金
福建省科技计划项目-省属公益类科研院所基本科研专项(2018R1002-2).
关键词
耳河螺
种群动态
生长
死亡
Rivularia auriculata
population dynamics
growth
mortality
