Influences of Cu or Cd on the neurotoxicity induced by petroleumhydrocarbons in ragworm Perinereis aibuhitensis
ZHANG Qianru , ZHOU Qixing , WANG Jing , SUN Shulan , HUA Tao , REN Liping
DOI:
Received May 21, 2007,Revised August 13, 2007, Accepted , Available online
Volume 20,2008,Pages 364-371
- Summary
- References
- Related Articles
The ecotoxicological e ects of heavy metals and petroleum hydrocarbons (PHCs) on ragworms are still vague. The relationships
between toxicological indices (mortality and acetylcholinesterase (AChE) activity) and concentrations of toxicants (Cu, Cd, and PHCs)
were examined in the estuary keystone species Perinereis aibuhitensis in laboratory conditions. The results of single toxicant indicated
that three toxicants had potentially physiological toxicity to P. aibuhitensis. The estimated 4-d and 10-d LC50 for Cu, Cd, and PHCs
was derived from the relationships between mortality and toxicants concentrations. Notable changes in the morphological signs and
symptoms of P. aibuhitensis exposed to PHCs were observed. The AChE activity of P. aibuhitensis was more sensitive to the toxicity
of PHCs than the others. The results of combined toxicants implied that the combined toxicity of Cu or Cd and PHCs to P. aibuhitensis
was related to the concentration combination of toxicants. Compared to single PHCs treatment, the addition of Cu or Cd significantly
mitigated the neurotoxicity of PHCs to AChE activity in P. aibuhitensis, which showed an antagonistic effect.
