摘要
本文研究Hg,Cu,Cd,Zn,Pb和Cr6种重金属对海洋鱼卵孵化和仔鱼成活的影响。结果表明,这些重金属对鱼卵孵化的毒性为:Hg>Cu>Zn>Cd>Cr>Pb,而对仔鱼成活的影响为:Hg>Cu>Cd>Zn>Pb>Cr。鱼卵比仔鱼有较大耐毒性,同一种重金属在不同的水质中的毒性规律是:无离子水>淡水>咸淡水>海水。本文还测定了6种重金属对仔鱼成活的半忍受限(TLm)。
The present investigation deals with the effects of six heavy metals on hatching the eggs and survival of larvae of flatfish,Paralichthys olivaceus(Temminck & Schlegel)and Cyno-glossus semilaevis Giinther,taken from Jiaozhou Bay,Qingdao.The metal ions tested are Hg,Cu,Zn,Cd,Pb and Cr.The results show that the toxic order of these metals is Hg>Cu>Zn>Cd>Cr>Pb for the hatching of eggs,while it is Hg>Cu>Cd>Zn>Pb>Cr for the survival of larval fish.The eggs tolerate higher concentrations as compared with larval fish.It is supposed that the egg membrane may play an important role in the prevention of the penetration of metal ions.The toxicity of the metals tested varies wiith the nature of water being in the order of nonion water>fresh water>brackish water>sea water.This may be due to a complex chemical process involved.TLm 96(Median Tolerance Limit)of the six heavy metals for larval fish tested are 0.37 ppm for Hg,0.08 ppm for Cu,0.25 ppm for Cd,0.50 ppm for Zn,0.75 ppm for Pb and 7.50 ppm for Cr.
作者
崔可铎
刘玉梅
侯兰英
Cui Keduo;Liu Yumei;Hou Lanying(Institute of Oceanology,Academia Sinica,Qingdao)
出处
《海洋与湖沼》
1987年第2期138-144,共7页
Oceanologia Et Limnologia Sinica
