Total mercury (T-Hg) in Anomalocardia brasiliana (Mollusca) under different biological and environmental conditions

Jacqueline Santos da Silva-Cavalcanti, Monica Ferreira da Costa, Helena do Amaral Kehrig


DOI: https://doi.org/10.3856/vol44-issue2-fulltext-8

Abstract


The objective was to determine the spatial-temporal distribution of total mercury (T-Hg) bioavailability at the Goiana Estuary using Anomalocardia brasiliana as model organism. Two seasons (rainy in February and dry in August), three habitats of the tidal flats (upper, middle and lower) and two size classes (<20 mm and >20 mm) were considered. In addition, depurated and non-depurated samples were tested. Individuals (N = 600) were pooled in samples representing the combinations of the above situations. T-Hg in the tissues of the pooled samples of A. brasiliana from Goiana Estuary varied from 0.06 and 0.18 µg g-1 dry weight. Significant differences occurred between treatments (P < 0.05). In average (10-30%), after depuration T-Hg concentrations decreased, especially at the tidal flat areas most exposed to tidal variations (upper and middle). There were no significant differences between seasons or size classes.

Santos da Silva-Cavalcanti J, Ferreira da Costa M, do Amaral Kehrig H. Total mercury (T-Hg) in Anomalocardia brasiliana (Mollusca) under different biological and environmental conditions. Lat. Am. J. Aquat. Res.. 2017;44(2): 267-274. Available from: doi:10.3856/vol44-issue2-fulltext-8 [Accessed 15 Nov. 2019].
Santos da Silva-Cavalcanti, J., Ferreira da Costa, M., & do Amaral Kehrig, H. (2017). Total mercury (T-Hg) in Anomalocardia brasiliana (Mollusca) under different biological and environmental conditions. Latin American Journal of Aquatic Research, 44(2), 267-274. doi:http://dx.doi.org/10.3856/vol44-issue2-fulltext-8