Mercury in Juvenile Solea senegalensis: Linking Bioaccumulation, Seafood Safety, and Neuro-Oxidative Responses under Climate Change-Related Stressors

Applied Sciences

Pedro Pousão-Ferreira¹  FabíolaH. S. Fogaça²  AnaLuísa Maulvault²  Carolina Camacho²  MartaT. Santos²  Vera Barbosa²  António Marques²  M.Leonor Nunes³  Rui Rosa⁴ 

[1] Aquaculture Research Station (EPPO), Portuguese Institute of Sea and Atmosphere (IPMA, I.P.), 8700-305 Olhão, Portugal;Division of Aquaculture, Seafood Upgrading and Bioprospection, Portuguese Institute of Sea and Atmosphere (IPMA, I.P.), Av. Doutor Alfredo Magalhães Ramalho 6, 1495-165 Algés, Portugal;Interdisciplinary Center of Marine Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos S/N, 4450-208 Matosinhos, Portugal;MARE-Marine Environmental Science Centre, Laboratório Marítimo da Guia, Faculdade de Ciências da Universidade de Lisboa, Av. Nossa Senhora do Cabo 939, 2750-374 Cascais, Portugal;

关键词: solea senegalensis;    mercury;    bioaccumulation;    warming;    acidification;    neuro-oxidative stress;    seafood safety;   

DOI  :  10.3390/app10061993

来源: DOAJ

【 摘 要 】

Mercury (Hg) is globally recognized as a persistent chemical contaminant that accumulates in marine biota, thus constituting an ecological hazard, as well as a health risk to seafood consumers. Climate change-related stressors may influence the bioaccumulation, detoxification, and toxicity of chemical contaminants, such as Hg. Yet, the potential interactions between environmental stressors and contaminants, as well as their impacts on marine organisms and seafood safety, are still unclear. Hence, the aim of this work was to assess the bioaccumulation of Hg and neuro-oxidative responses on the commercial flat fish species Solea senegalensis (muscle, liver, and brain) co-exposed to dietary Hg in its most toxic form (i.e., MeHg), seawater warming (ΔT°C = +4 °C), and acidification (pCO₂ = +1000 µatm, equivalent to ΔpH = −0.4 units). In general, fish liver exhibited the highest Hg concentration, followed by brain and muscle. Warming enhanced Hg bioaccumulation, whereas acidification decreased this element’s levels. Neuro-oxidative responses to stressors were affected by both climate change-related stressors and Hg dietary exposure. Hazard quotient (HQ) estimations evidenced that human exposure to Hg through the consumption of fish species may be aggravated in tomorrow’s ocean, thus raising concerns from the seafood safety perspective.

【 授权许可】

Unknown