卤虫(Artemia salina)卵孵化条件、网箱孵化和幼体收集时机的研究

THE STUDY OF THE HATCHING CONDITIONS, CAGE-HATCHING AND COLLECTION TIMING OF THE NAUPLIUS OF ARTEMIA SAUNA CYSTS

本文研究了温度、盐度、pH和光刺激对卤虫卵孵化的影响,提出了本品系卤卵大量孵化的最适孵化温度、盐度和pH控制范围,并就孵化时对卤虫卵进 行室内自然光刺激持续的时间和阶段进行了试验,发现光刺激也可在孵化前进行。本试验首次应用23cm×23cm×40cm的网箱进行卤虫卵的孵化,其效果比相同水体的水泥池约提高一倍。本文还从无节幼体的活力、孵化水质的变化和孵化高蜂期等方面,探讨了卤虫卵大量孵化时无节幼体的收集最有利时机。

Experiments were carried out to study the effect of temperature, salinity, pH and photic stimulation upon the hatching of Anemia salina cysts on a large scale hatching. Time duration of indoor natural light stimulaiton of Artemia cysts and the different stages of photic stimulation can also be carried out before hatching. The large scale hatching of Artemia was initiated in the floating cage with the size of 23×23×40 centimetres, which has the advantages that Artemia cysts don't sink to the bottom, aeration is even and sufficient the water quality is not easy to deteriorate and the facility is quite simplified. The hatching efficiency is doubled as. compared with that in cement hatching tank. The activity of the nauplius, the change of the hatching water quality, the hatching peak period and the best collection timing of the nauplius when the Artemia cysts are hatched on a large scale were also investigated.