Mercury and selenium concentrations in lanugo of free-ranging California sea lions in the southern Gulf of California, Mexico.

Autor: Symon TE; Centro de Investigaciones Biológicas del Noroeste, S. C (CIBNOR), 23096 La Paz, Mexico. Electronic address: tsymon@pg.cibnor.mx., Murillo-Cisneros DA; Centro de Investigaciones Biológicas del Noroeste, S. C (CIBNOR), 23096 La Paz, Mexico. Electronic address: dcisneros@pg.cibnor.mx., Hernández-Camacho CJ; Centro Interdisciplinario de Ciencias Marinas, Instituto Politécnico Nacional, 23096 La Paz, Mexico. Electronic address: jcamacho@ipn.mx., O'Hara TM; School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station 77843, United States of America. Electronic address: tmohara@tamu.edu., Taylor RJ; School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station 77843, United States of America. Electronic address: rtaylor@cvm.tamu.edu., Rosado-Berrios CA; School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station 77843, United States of America. Electronic address: carosadoberrios@cvm.tamu.edu., Vázquez-Medina JP; Department of Integrative Biology, University of California, Berkeley, 94720 Berkeley, United States of America. Electronic address: jpv-m@berkeley.edu., Zenteno-Savín T; Centro de Investigaciones Biológicas del Noroeste, S. C (CIBNOR), 23096 La Paz, Mexico. Electronic address: tzenteno04@cibnor.mx.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2023 Dec; Vol. 197, pp. 115712. Date of Electronic Publication: 2023 Nov 01.
DOI: 10.1016/j.marpolbul.2023.115712
Abstrakt: Total mercury ([THg]) and selenium ([TSe]) concentrations were determined in California sea lion (Zalophus californianus) lanugo from the Gulf of California in 2021 and 2022. Relationships with sex, morphometrics, and year were evaluated. Following toxicological thresholds of concern for piscivorous mammals, most pups had a [THg] < 10 ppm, one pup (2021) had a [THg] > 20 ppm, no pups had a [THg] > 30 ppm. Females had significantly higher [TSe] than males; sex did not influence [THg]. [THg] and [TSe] in 2022 were significantly higher in the general population and male cohorts compared to 2021. Significant negative correlations were observed between [THg], [TSe], and morphometrics (2021). These results indicate that, compared to other pinniped species, regional California sea lions may have a decreased likelihood of experiencing Hg-related adverse health effects. Year-related changes in element concentrations suggest continued monitoring of this population to assess pinniped, environmental, and potentially, human health.
Competing Interests: Declaration of competing 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.
(Copyright © 2023 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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