水生生物学报2018，Vol.42Issue(6)：1144-1152,9.DOI:10.7541/2018.140
长江中游养殖湖泊大通湖河蚬种群动态及次级生产力
POPULATION DYNAMICS AND SECONDARY PRODUCTION OF CORBICULA FLUMINEA (M(U)LLER, 1774) IN A TYPICAL AQUACULTURAL LAKE (DATONG) OF THE CENTRAL YANGTZE RIVER BASIN, CHINA
摘要
Abstract
Samples of Corbiculafluminea (Müller,1774) were collected monthly from March 2011 to February 2012 in the Datong Lake to study its population dynamics and secondary production in its native environment.A total of 4,108 C.fluminea were collected and measured,with shell length (SL) ranging from 3.41 to 29.58 mm,and wet weight (WW) ranged from 0.005 to 10.03 g.The calculated SL-WW equation was log WW=-3.52+3.08 log SL (R2=0.97),which showed that the growth curve of C.fluminea followed a positive allometric pattern.The recruitment patterns peaked in one from March to April and the other one during the months of August to October.The mean annual abundance and biomass ((B)) were (2744-95) ind./m2 and (20.14±5.7) g AFDW/m2 (Ash Free Dry Weight,AFDW),respectively.The annual secondary production (P)was estimated to be 23.90 g AFDW/mLyear,resulting in a P/(B) ratio of 1.20/year and a turnover time of 298 days.The asymptotic maximum length (L∞),curvature parameter (K) and seasonal oscillation in growth rate (C) derived from the von Bertalanffy Seasonal Growth Formula (VBSGF) were 31.91 mm,0.45/year,.and 0.84,respectively.The slowest growth period was in January,and the potential lifespan (tmax) was estimated to be 4.44 years.The total mortality (Z),natural mortality (M) and fishing mortality rates (F) estimateddwere 1.68/year,0.89/year and 0.79/year,respectively.Its exploitation rate (E=0.47) indicated a slightly high exploited stock that needs some management intervention to maintain the sustainability of this fishery resource.关键词
河蚬/种群动态/次级生产力/生长/死亡率/大通湖Key words
Corbicula fluminea/Population dynamics/Secondary Production/Growth/Mortality/Datong Lake分类
农业科技引用本文复制引用
李德亮,张健,皮杰,高子涵,肖调义,陈宇顺..长江中游养殖湖泊大通湖河蚬种群动态及次级生产力[J].水生生物学报,2018,42(6):1144-1152,9.基金项目
Supported by the Special Fund for Agro-Scientific Research in the Public Interest (201303056 and 201503108) （201303056 and 201503108）
Chinese Academy of Sciences (Projects Y45Z04,Y62302 and ZDRW-ZS-2017-3-2) （Projects Y45Z04,Y62302 and ZDRW-ZS-2017-3-2）
