摘要
盐度对卜氏晶囊轮虫 (Asplanchnabrightwelli)生长、发育及存活具有一定的影响。在水温 2 5℃自然光照下 ,盐度分别为 0、 1、 2、 3时 ,以盐度为 2的内禀增长率rm、周限增长率λ和净增殖率R0 最高 ,分别为 1 665 8、 5 2 899和 2 0 1 ;盐度为 2的一生生殖次数和总生殖量也最高 ,分别为 4 9、 2 3 2个 ,其平均寿命最长为 98 4h ,产前发育期最短为 1 8 71h。世代时间以盐度 3最短 ,为 1 441 4d。本研究结果表明 ,盐度 2是卜氏晶囊轮虫生活的最佳盐度。
Influence of salinity on growth, development and survival of \%Asplanchna brightwelli\% was studied outdoors at water temperature of 25℃ at salinity gradient of 0,1,2 and 3. The results indicated that intrinsic growth rate of increase(rm), finite incremental rate, net rate of proliferation, reproductive times and total reproductive quantity all peaked at salinity of 2, which was 1.6658, 5.2899, 20.1, 4 9 and 23 2, respectively. At this salinity level it also possessed the longest life span, on average, reaching 98 4 days but the shortest developmental stage of pre-reproduction descending to 18 71 days. At salinity of 3 its lifetime was the shortest, namely 1 4414 days. Salinity of 2 is considered to be the optimal for existence of \%Asplanchna brightwelli\%.
出处
《大连水产学院学报》
CSCD
北大核心
2002年第1期37-41,共5页
Journal of Dalian Fisheries University
基金
辽宁省科学技术基金项目 (981 0 1 0 0 3 0 1 )
关键词
卜氏晶囊轮虫
盐度
生殖发育
内禀增长率
活饵料
Asplanchna brightwelli\%
salinity
reproduction and development
intrinsic growth rate
