Effects of algal concentration and initial density on the population growth of Diaphanosoma celebensis Stingelin(Crustacea,Cladocera)  

作　　者：王岩 谢宁峡 王伟良 

机构地区：[1]College of Animal Sciences,Zhejiang University [2]College of Fisheries and Life Science,Shanghai Ocean University

出　　处：《Chinese Journal of Oceanology and Limnology》2009年第3期480-486,共7页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (No 30471340)

摘　　要：The effects of algal concentration and initial density on the population growth of the estuarine cladocera, Diaphanosoma celebensis Stingelin, were evaluated in an indoor experiment. A 2 × 4 layout that included two algal concentrations （Chlorella pyrenoidosa, 1 × 10^6 and 3 ×10^6 cell/mL） and four inoculation densities （100, 200, 300 and 400 ind./L） were established. Diaphanosoma celebensis were reared in 150 mL flasks containing 50 mL of algal medium at 22℃, under salinity of 10 and a photoperiod of 12 h L： 12 h D. The lag phase required to initiate continuous population growth following inoculation was shorter for D. celebensis fed 1 × 10^6 cell/mL and inoculated at 300 or 400 ind./L than that for D. celebensis fed 3 × 10^6 cell/mL and inoculated at 100 or 200 ind./L. However, D. celebensis fed 3 × 10^6 cell/mL and inoculated at 100 or 200 ind./L exhibited longer periods of positive population growth The maximum population densities were 5 875 ± 324, 6 690 ± 691, 7 735 ± 1,121 and 6 365 ± 691 ind./L for D. celebensis fed 1 × 10^6 cell/mL and inoculated at 100, 200, 300 and 400 ind./L, respectively, and 15 070 ± 379, 12 215 ± 648, 11 960±2,551 and 16 130 ± 880 ind./L for D. celebensis fed 3 ×10^6 cell/mL and inoculated at 100, 200, 300 and 400 ind./L, respectively. The average daily increasing rates of population were 0.076 ± 0.001, 0.065 ± 0.002, 0.055 ±0.002 and 0.048 ± 0.003 for D. celebensis fed 1×10^6 cell/mL and inoculated at 100, 200, 300 and 400 ind./L, respectively, and 0.098± 0.001, 0.078 ± 0.002, 0.072 ± 0.003 and 0.067 ± 0.003 forD. celebensis fed 3 × 10^6 cell/mL and inoculated at 100, 200, 300 and 400 ind./L, respectively. The maximum population density and average daily increasing rate of population increased as the algal concentration increased, whereas an increase in the inoculation density led to a linear decrease in the daily increasing rate of population under both algal concentrations. The results of the present experiment indicate that the algal concenThe effects of algal concentration and initial density on the population growth of the estuarine cladocera,Diaphanosoma celebensis Stingelin,were evaluated in an indoor experiment.A 2 × 4 layout that included two algal concentrations(Chlorella pyrenoidosa,1 × 106 and 3 × 106 cell/mL) and four inoculation densities(100,200,300 and 400 ind./L) were established.Diaphanosoma celebensis were reared in 150 mL flasks containing 50 mL of algal medium at 22°C,under salinity of 10 and a photoperiod of 12 h L:12 h D.The lag phase required to initiate continuous population growth following inoculation was shorter for D.celebensis fed 1 × 106 cell/mL and inoculated at 300 or 400 ind./L than that for D.celebensis fed 3 × 106 cell/mL and inoculated at 100 or 200 ind./L.However,D.celebensis fed 3 × 106 cell/mL and inoculated at 100 or 200 ind./L exhibited longer periods of positive population growth.The maximum population densities were 5 875 ± 324,6 690 ± 691,7 735 ± 1,121 and 6 365 ± 691 ind./L for D.celebensis fed 1 × 106 cell/mL and inoculated at 100,200,300 and 400 ind./L,respectively,and 15 070 ± 379,12 215 ± 648,11 960 ± 2,551 and 16 130 ± 880 ind./L for D.celebensis fed 3 × 106 cell/mL and inoculated at 100,200,300 and 400 ind./L,respectively.The average daily increasing rates of population were 0.076 ± 0.001,0.065 ± 0.002,0.055 ± 0.002 and 0.048 ± 0.003 for D.celebensis fed 1×106 cell/mL and inoculated at 100,200,300 and 400 ind./L,respectively,and 0.098 ± 0.001,0.078 ± 0.002,0.072 ± 0.003 and 0.067 ± 0.003 for D.celebensis fed 3 × 106 cell/mL and inoculated at 100,200,300 and 400 ind./L,respectively.The maximum population density and average daily increasing rate of population increased as the algal concentration increased,whereas an increase in the inoculation density led to a linear decrease in the daily increasing rate of population under both algal concentrations.The results of the present experiment indicate that the algal concentration and inoculation density significantly affect popula

关 键 词：Diaphanosoma celebensis population growth algal concentration inoculation density 

分 类 号：Q958[生物学—动物学]