卤水Na/Mg比值对卤虫发育生长的影响

Preliminary study of the Effect of Na/Mg Ratio of Artificial Seawater and Natural Seawater on Hatching Ability of Artemia Cysts

卤虫的生长发育依赖于卤水中各种生态因子的综合作用 ,但是卤水中Na+、Mg2 +含量及其Na/Mg比值是影响卤虫发育生长的关键性因子。本文就此做了一些探讨 :①使用人工配制海水的原理和方法 ,配制不同浓度、不同Na/Mg比值的卤水 ,进行卤虫卵孵化试验。②使用天然海水 ,人为改变卤水Na/Mg比值 ,进行卤虫卵孵化试验。通过这些试验探讨卤水Na/Mg比值对卤虫孵化、发育的影响。证实了卤水中Na+、Mg2 +是影响卤虫发育生长的限制因子 ;Na/Mg比值为 6～ 8,最适宜卤虫的发育生长 ;同时证实了天然海水中各种离子以及微量元素。

The hatching ability of Artemia cysts largely depends on the co-effect of chemical and biological factors of hatching medium,the content of Na +,Mg 2+ and Na/Mg ratio seems to be one of the key factors for Artemia hatching when we hatched the cysts from Karabogazgol(Turkmenistan).In this preliminary study,the experiment was conducted to evaluate the effect of Na/Mg ratio of hatching medium on hatching ability of Artemia cysts.The hatching of Artemia cysts was performed by using artificial seawater formulated at different concentration of Na +,Mg 2+ and different Na/Mg ratio and natural seawater adjusted at different Na/Mg ratio.The result shows that Na +?Mg 2+ is the limited factor for hatching of Artemia cysts,the optimum Na/Mg ratio ranges from 6-8.The study also indicates that the ions and trace element in natural seawater could reduce the effect of Na/Mg during Artemia hatching.