汞等六种重金属对鱼卵孵化和仔鱼成活的影响

为了解重金属对海洋鱼卵的孵化和仔鱼成活的毒性规律,对防止污染和保护水产资源提供科学依据,我们进行了六种重金属(Hg~( ),Cu~( ),Cd~( ),Zn~( ),Pb~( )和Cr~( ))对海洋鱼卵的孵化和仔鱼成活的毒性研究。 胶州湾是多种经济鱼类产卵和发育的场所,5月中旬—6月中旬,水温在15—17℃时是适宜的产卵季节,拖网常见的鱼卵约

EFFECTS OF METALS ON HATCHING SURVIVAL OF MARINE FISH EGGS

The present investigations focus on the effects of various concentrations of six heavy metals on hatching the eggs and survival of larvae of flatfish taken from Jiaozhou Bay Qing-dao. Metals tested are Hg, Cu, Zn, Cd, Fb and Cr from their salts. The results show that the eggs are much more resistant to pollutant substances than larval fish. The heavy metals try to permeate through protecting membrance into eggs. The toxicity of heavy metals varies with the hardness of water, being in order of nonion water>fresh water>salty-fresh water>sea water.