一种耐高温大型溞HB的培养和生物学的初步研究

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,24h EC50为0.92mg/L(20%)。  

PRELIMINARY STUDY OF BREEDING AND BIOLOGY OF DAPHNIA MAGNA HB,A HIGH TEMPERATURERESISTANT SPECIES

This study investigated the effects of population density,food,temperature and light in- tensity on the growth and reproduction of D. magna HB,collected,in summer in fish ponds in Wuhan,as well as the methods of breeding and strain maintenance.Results from three years continuous breeding in the laboratory showed that D. magna HB grew and reproduced normally between 15-31℃ when fed fresh green algae.At 31℃,the maximum body length was 3.65 mm and the maximum number of eggs/brood was 26. According to the method recommended by the ISO 6341,the susceptibility of Daphnia magna HB to the standard toxicant,potassium dichromate was determined,24h EC50 was 0.92 mg/L.