Tags

Type your tag names separated by a space and hit enter

Dependency of copper toxicity to polychaete larvae on algal concentration.
Aquat Toxicol. 2006 May 01; 77(2):117-25.AT

Abstract

Algae are often used as food in aquatic metal toxicity tests to maintain the well-being of test animals. Such food addition may change metal bioavailability because of the reduction of aqueous metal concentration and the increase in particle-bound metal concentration. While the importance of aqueous exposure pathway is widely recognized, few studies have determined the contribution of the dietary pathway to the overall metal toxicity to aquatic invertebrates. In this study, we determined the toxicity of both algal-bound copper alone and copper solution containing algae to the larvae of marine polychaete Hydroides elegans. Algae that had been pre-exposed to copper at up to 1024 microg l(-1), when fed to the larvae, did not cause significant abnormal larval development. However, when larvae were exposed to algal-copper mixture, percentage of normal larvae could be modeled as a logistic function of aqueous copper concentration, with a 48-h EC(50) (mean +/- S.E.) of 64.9 +/- 4.8 microg Cul(-1). When the toxicity was expressed using total copper concentration, the EC(50) ranged from 58.4 +/- 4.5 microg l(-1) in the control to 121.9 +/- 9.9 microg l(-1) in the 10(6) cells ml(-1) algal treatment. This study highlights the dependency of copper toxicity on the aqueous exposure pathway in this polychaete and the importance of considering algal binding of the metal in larval toxicological tests.

Authors+Show Affiliations

Wong NC
Department of Biology, Hong Kong Baptist University, PR China.
Wong MH
No affiliation info available
Shiu KK
No affiliation info available
Qiu JW
No affiliation info available

MeSH

AdsorptionAnimalsBiological AssayCopperEnvironmental ExposureEukaryotaLarvaPolychaetaTime FactorsWater Pollutants, Chemical

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16356560

Citation

Wong, Nga Cheung, et al. "Dependency of Copper Toxicity to Polychaete Larvae On Algal Concentration." Aquatic Toxicology (Amsterdam, Netherlands), vol. 77, no. 2, 2006, pp. 117-25.
Wong NC, Wong MH, Shiu KK, et al. Dependency of copper toxicity to polychaete larvae on algal concentration. Aquat Toxicol. 2006;77(2):117-25.
Wong, N. C., Wong, M. H., Shiu, K. K., & Qiu, J. W. (2006). Dependency of copper toxicity to polychaete larvae on algal concentration. Aquatic Toxicology (Amsterdam, Netherlands), 77(2), 117-25.
Wong NC, et al. Dependency of Copper Toxicity to Polychaete Larvae On Algal Concentration. Aquat Toxicol. 2006 May 1;77(2):117-25. PubMed PMID: 16356560.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dependency of copper toxicity to polychaete larvae on algal concentration. AU - Wong,Nga Cheung, AU - Wong,Ming H, AU - Shiu,Kwok Keung, AU - Qiu,Jian-Wen, Y1 - 2005/12/13/ PY - 2005/06/28/received PY - 2005/11/16/revised PY - 2005/11/16/accepted PY - 2005/12/17/pubmed PY - 2007/8/3/medline PY - 2005/12/17/entrez SP - 117 EP - 25 JF - Aquatic toxicology (Amsterdam, Netherlands) JO - Aquat Toxicol VL - 77 IS - 2 N2 - Algae are often used as food in aquatic metal toxicity tests to maintain the well-being of test animals. Such food addition may change metal bioavailability because of the reduction of aqueous metal concentration and the increase in particle-bound metal concentration. While the importance of aqueous exposure pathway is widely recognized, few studies have determined the contribution of the dietary pathway to the overall metal toxicity to aquatic invertebrates. In this study, we determined the toxicity of both algal-bound copper alone and copper solution containing algae to the larvae of marine polychaete Hydroides elegans. Algae that had been pre-exposed to copper at up to 1024 microg l(-1), when fed to the larvae, did not cause significant abnormal larval development. However, when larvae were exposed to algal-copper mixture, percentage of normal larvae could be modeled as a logistic function of aqueous copper concentration, with a 48-h EC(50) (mean +/- S.E.) of 64.9 +/- 4.8 microg Cul(-1). When the toxicity was expressed using total copper concentration, the EC(50) ranged from 58.4 +/- 4.5 microg l(-1) in the control to 121.9 +/- 9.9 microg l(-1) in the 10(6) cells ml(-1) algal treatment. This study highlights the dependency of copper toxicity on the aqueous exposure pathway in this polychaete and the importance of considering algal binding of the metal in larval toxicological tests. SN - 0166-445X UR - https://www.unboundmedicine.com/medline/citation/16356560/Dependency_of_copper_toxicity_to_polychaete_larvae_on_algal_concentration_ DB - PRIME DP - Unbound Medicine ER -