氨氮对不同生长阶段的弧边招潮急性毒性研究  

Acute Toxicity of Ammonia-N on Different Growth Stages of Fiddler Crab Uca arcuata(de Haan,1835)

作　　者：彭超[1] 胡威[1] 朱丹丹[1] 袁毅[1] 朱麟[1] 

机构地区：[1]海南省热带动植物生态学重点实验室,海南师范大学生命科学学院,海口571158

出　　处：《四川动物》2013年第4期568-572,共5页Sichuan Journal of Zoology

摘　　要：在pH8.09、水温28℃±1℃、盐度5‰条件下,进行了氨氮对不同生长阶段的弧边招潮急性毒性试验。结果显示:氨氮对全甲宽小于1.5cm、1.5cm、1.5cm至2.5cm之间3个生长阶段的弧边招潮96h的半数致死浓度(LC50)分别为47.28mg·L-1、71.49mg·L-1和90.57mg·L-1,三者之间差异极显著(P<0.01),对应的非离子氨浓度为3.71mg·L-1、5.61mg·L-1和7.11mg·L-1;氨氮的安全浓度分别为4.73mg·L-1、7.15mg·L-1和9.06mg·L-1,对应的非离子氨浓度为0.37mg·L-1、0.56mg·L-1和0.71mg·L-1。结果表明,氨氮对弧边招潮的毒性与氨氮浓度和中毒时间呈正相关。3个生长阶段弧边招潮对氨氮的耐受性大小次序为:全甲宽1.5cm至2.5cm之间>全甲宽1.5cm>全甲宽小于1.5cm。The acute toxicity test of ammonia-N on the fiddler crab ( Uca arcuata) was studied under specific conditions ( pH8. 09,28℃ ±1℃,salinity of 5‰) . The results showed that the 96 h median lethal concentrations of ammonia-N on U. arcuata at three growth stages ( the carapace width less than 1. 5 cm,1. 5 cm,1. 5 ～ 2. 5 cm) were 47. 28 mg·L-1 , 71. 49 mg·L-1 and 90. 57 mg·L-1 ,respectively ( P <0. 01) . And the corresponding non-ionic ammonia-N concentrations were 3. 71 mg·L-1 ,5. 61 mg·L-1 and 7. 11 mg·L-1 . The safety concentrations were 4. 73 mg·L-1 ,7. 15 mg·L-1 and 9. 06 mg·L-1 . The corresponding non-ionic ammonia concentrations were 0. 37 mg·L-1 ,0. 56 mg·L-1 and 0. 71 mg·L-1 . Significant positive correlation was observed between the ammonia-N concentration,maintained time and toxicity. The sequence of tolerance was the carapace width 1. 5 ～ 2. 5 cm > 1. 5 cm > less than 1. 5 cm.

关 键 词：氨氮 弧边招潮 急性毒性 半数致死浓度 

分 类 号：X174[环境科学与工程—环境科学]