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本文介绍了夏季在武汉鱼池所采的耐高温大型溞(Daphnia magna HB),对其生长繁殖及其实验室条件下溞的种群密度、食物、温度和光照强度对生长、发育的影响,并对其培养和保种方法进行了研究。连续3年实验室的培养表明,在以新鲜藻类为食物的情况下,此种溢在15—31℃时能正常生长、繁殖。在31℃时,其最大体长为3.65mm,最高怀卵量为26个。根据国际标准法组织所介绍的(ISO 6341)对标准毒物——重铬酸钾的敏感性试验,24hEC_(50)为0.92mg/L(20%)。
In this paper, we introduced the effect of Daphnia magna HB collected in Wuhan fish pond in summer on its growth and development, population density, food, temperature and light intensity on its growth and development under laboratory conditions. Its cultivation and conservation methods were studied. Three consecutive years of laboratory culture showed that in the case of fresh algae for food, the spill in the 15-31 ℃ normal growth and reproduction. At 31 ℃, the maximum body length of 3.65mm, the maximum amount of fecundity is 26. According to the ISO 6341 test for sensitivity to standard potassium dichromate, 24hEC 50 was 0.92 mg / L (20%).