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Effects on Growth of Juvenile Abalones Haliotis tuberculata Under Chronic Exposition to Metals Released from the Dissolution of an Aluminium-Based Galvanic Anode

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Abstract

In the marine environment, the galvanic anode cathodic protection system (GACP) undergoes oxidation and releases metals in the forms of ions or oxy-hydroxides into the environment. The objective of the present study was to investigate the toxicity of a cocktail of metals released from the dissolution of an aluminium-based galvanic anode (~ 95% Al, ~ 5% Zn) on the abalone Haliotis tuberculata. Juveniles were exposed for 16 weeks (i.e. 12 weeks of exposure and 4 weeks of decontamination phase) and their growth, intake rate, conversion rate and metallic concentrations were monitored. A total of 6 conditions were tested: a control, 4 concentrations based on Al and a trophic control. Results showed that the mortality reached 57% for individuals exposed to 1125 µg L−1 of Al, and the abalone growth significantly decreased for an Al concentration greater than 495 µg L−1. At the highest exposure concentration, intake rate measurements revealed that the appetite of abalones was affected, supported by the large increase in the conversion rate which was indicative of a poor feed efficiency. The monitoring of metallic concentrations showed that H. tuberculata strongly bioconcentrated Al relative to zinc. The diet did not appear to be the primary pathway for metal entry. Concentrations that significantly impacted abalone growth and survival during the experiment were higher than those found in natural environment, but the bioconcentration of Al into the tissues of a primary consumer such as abalone may be a potential pathway for Al to enter food webs.

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Acknowledgments

The authors thank the Normandy region and the Seine Normandy water agency (AESN) for their funding.

Funding

The authors thank the Normandy region and the Seine Normandy water agency (AESN) for their funding. Olivier Basuyaux has received research support the AESNThe authors have not disclosed any funding.

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Contributions

LN contributed to conceptualization, experimental maintenance, writing—review and editing, funding acquisition, statistical analysis. AL contributed to conceptualization, writing—review and editing, funding acquisition, statistical analysis. OB contributed to conceptualization, writing—review and editing, funding acquisition, experimental maintenance. KC contributed to conceptualization, writing—review and editing, funding acquisition, statistical analysis. J-ML contributed to conceptualization, project administration. SL contributed to conceptualization, experimental maintenance. GG contributed to conceptualization, experimental maintenance. AS contributed to conceptualization, writing—review and editing, funding acquisition. CCaplat contributed to conceptualization, writing—review and editing, funding acquisition.

Corresponding author

Correspondence to Antoine Serpentini.

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Conflict of interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Nivelais, L., Levallois, A., Basuyaux, O. et al. Effects on Growth of Juvenile Abalones Haliotis tuberculata Under Chronic Exposition to Metals Released from the Dissolution of an Aluminium-Based Galvanic Anode. Arch Environ Contam Toxicol 84, 32–44 (2023). https://doi.org/10.1007/s00244-022-00975-y

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  • DOI: https://doi.org/10.1007/s00244-022-00975-y

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