摘要
在温度（２０±１）℃、盐度２２～２４‰条件下，对海蜇螅状幼体和碟状幼体进行了ｐＨ适应性试验和不同ｐＨ下氨氮的急性毒性试验。结果表明：适合海蜇螅状幼体和碟状幼体生活的ｐＨ范围为７～９，最适ｐＨ范围为７．５～８．５。在此ｐＨ范围内，不仅非离子氨具有毒性，离子铵在浓度高时亦具有毒性。对于螅状幼体，非离子氨的毒性大约是离子铵的９０～１１０倍；对于碟状幼体。
The tests for the acute toxicity of ammonia on scyphistoma and ephyra of jellyfish ( Rhopilema esculenta ) are carried out under different pH values at temperature of (20±1)℃ and salinity of 22-24‰. The effect of pH for the survival of scyphistoma and ephyra is studied. The results have shown that the range of pH is from 7 to 9, and optimum range is 7.5 to 8.5 for survival of scyphistoma and ephyra. The toxicity of ammonia is not due solely to the unionized ammonia (UIA), and a large amount of ionized ammonia (IA) exerts a toxic effect within the pH 7￣9. The experiment indicate that the tokicity of UIA is 90￣110 times more than IA to scyphistoma and is 117￣220 times to ephyra.
出处
《大连水产学院学报》
CSCD
1997年第1期8-14,共7页
Journal of Dalian Fisheries University
