摘要
在室内进行了铜、镉对中华哲水蚤(Calanus sinicus Brodsky)氨基酸含量影响实验。结果表明,当外加重金属浓度较低时(Cu,2—10μg/L;cd,10—150μg/L),动物各种氨基酸含量明显提高,总氨基酸含量比对照组约增加10—31％;重金属浓度提高时,动物氨基酸含量则出现下降趋势,说明较低浓度重金属对动物有刺激效应,此时摄食活动加强,增加了从摄食获得的营养成分;浓度提高则产生抑制效应。因此,氨基酸含量的变化,可作为桡足类对外界重金属污染物作出生理反应的指标之一。文中对某些特殊氨基酸含量的变化及机制也进行了讨论。
The effects of copper and cadmium on the amino acid contents in Calanus sinicus were studied under the laboratory condition. Results showed that the various amino acid contents in animals were obviously increased, with the total amino acid increasing by 10-31% when the animals were exposed to the lower betal levels (added Cu2-10μg/L or Cd10-150μg/L), whereas amino acid contents appeared a declining tendency when the animals were incubated in seawater with higher metal levels. These indicated that lower metal levels could cause a stimulative effect on copepod, which made the animals strengthen their ingestive activity and absorb more nutrients from the diet, and higher metal levels could result in an inhibitory effect on copepod. Therefore, the changes of amino acid contents in marine copepod might be used as one of the indicators reflecting physiolosical state of the animals in seawater with heavy metal pollutants.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1991年第3期242-248,共7页
Oceanologia Et Limnologia Sinica
