摘要
研究了不同质量浓度的微绿球藻对罗氏沼虾(Macrobrachium rosenbergii)幼体生长发育的影响。试验分为5组,对照、A、B、C、D组的微绿球藻质量浓度分别为0、2.5×105、7.5×105、12.5×105和25.0×105cell/m L。试验结果显示:C组和D组的罗氏沼虾幼体存活率分别为54.7%和59.3%,显著高于其他组的(P<0.05);C组和D组的幼体变态时间显著短于A组与对照组的,以D组的变态时间最短,仅为29.3 d;C组和D组的变态仔虾干重显著大于A组与对照组的;不同浓度微绿球藻对罗氏沼虾变态仔虾的全长影响不显著。说明在罗氏沼虾育苗过程中,添加12.5×105~25.0×105cell/m L的微绿球藻,有利于罗氏沼虾幼体的生长发育。
The influence of different mass concentrations of Nannochloris oculata on the growth and development of Macrobra- chium rosenbergii larvae was studied. This experiment designed five groups, and the mass concentration of IV. oculata in the control group, group A, group B, group C and group D was 0, 2.5×10^5, 7.5×10^5 , 12.5×10^5 and 25.0×10^5 eell/mL, respectively. The experimental results showed that the larval survival rate of M. rosenbergii in group C and group D was 54.7% and 59.3%, respec- tively, which was significantly higher than that in the other groups （P〈0.05）. The metamorphic time of M. rosenbergii larvae in group C and group D was significantly shorter than that in group A and the control group, and the metamorphic time in group D was the shortest （29.3 d）. The dry weight of metamorphic shrimps in group C and group D was significantly heavier than that in group A and the control group. The different mass concentrations of IV. oculata had no significant influence on the full-length of metamorphic shrimps. It is concluded that adding 12.5×10^5- 25.0×10^5cell/mL N. oculata is conducive to the growth and devel- opment of M. rosenbergii larvae in the course of larval breeding.
出处
《江西农业学报》
CAS
2017年第6期90-93,共4页
Acta Agriculturae Jiangxi
基金
广东省科技计划项目(2013B020502003)
佛山市科技创新专项基金项目(2014AG10022)
关键词
罗氏沼虾
微绿球藻
育苗
幼体
存活率
发育
Macrobrachium rosenbergii
Nannochloris oculata
Larval breeding
Larvae
Survival rate
Development
