Abstract
Cadmium, lead, copper, and zinc were analyzed in the dorsal muscle, liver, gonad, and stomach contents of 67 sailfish, Istiophorus platypterus, from the Eastern Pacific. Muscle exhibited the following pattern (μg/g wet weight): Zn (15.05 ± 1.24) > Cu (0.461 ± 0.026) > Cd (0.434 ± 0.099) > Pb (0.025 ± 0.001); liver Zn (119.1 ± 7.6) > Cd (95.1 ± 11.0) > Cu (39.7 ± 2.6) > Pb (0.047 ± 0.004); and gonad Zn (96.8 ± 7.8) > Cd (2.16 ± 0.38) > Cu (2.08 ± 0.14) > Pb (0.033 ± 0.003). Significant (p < 0.05) correlations were observed between elements, length, and weight. I. platypterus feed mainly on fishes and cephalopods with variable concentrations (μg/g wet weight) of Cd (0.081–11.41), Pb (0.002–0.057), Cu (0.204–4.35), and Zn (3.23–86.6). Of the four analyzed elements, only Pb was biomagnified (BMF = 1.85). According to the regulatory limits, muscle exhibited Cd concentrations higher than the Official Mexican Standard, WHO, FDA (28 % of samples), and the European Union (40 %) regulations.
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This work received financial support from PAPIIT (Programa de Apoyo a Proyectos de Investigación e Innovación) IN208813 by the Universidad Nacional Autónoma de México, DGIP-UAS (Dirección General de Investigación y Posgrado-Universidad Autónoma de Sinaloa) and from Proyecto CONACYT 204818. The authors thank R. Hernández-Guzmán and G. Ramírez-Reséndiz for assistance with the figures and map. Special thanks to H. Bojórquez-Leyva for assistance with the analytical work and R. Lara-Mendoza, K. Bergés-García, and J. Mora-Carrillo for sampling and field work.
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Moreno-Sierra, D., Bergés-Tiznado, M.E., Márquez-Farías, F. et al. Trace metals in target tissues and stomach contents of the top predator sailfish Istiophorus platypterus from the Eastern Pacific: concentrations and contrasting behavior of biomagnification. Environ Sci Pollut Res 23, 23791–23803 (2016). https://doi.org/10.1007/s11356-016-7551-y
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DOI: https://doi.org/10.1007/s11356-016-7551-y