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Mercury and Cadmium Concentrations in Muscle Tissue of the Blue Shark (Prionace glauca) in the Central Eastern Pacific Ocean.

Authors
  • Castro-Rendón, Rubén D1
  • Calle-Morán, Marcos D2
  • García-Arévalo, Isabel2, 3
  • Ordiano-Flores, Alfredo4
  • Galván-Magaña, Felipe5
  • 1 Facultad de Artes Y Ciencias Liberales, Universidad de Especialidades Espíritu Santo (UEES), Escuela de Ciencias Ambientales, Km 2.5 vía La Puntilla, C.P. 092301, Guayaquil, Ecuador. , (Ecuador)
  • 2 Facultad de Ciencias del Mar, Programa de Doctorado en Ciencias Con Mención en Recursos Acuáticos, Universidad Autónoma de Sinaloa, Paseo Clausen S/N, C.P. 82000, Mazatlán, Mexico. , (Mexico)
  • 3 Laboratoire de Biogéochimie Des Contaminants Métalliques, Ifremer, Centre Atlantique, 44311 Cedex 3, Nantes, France. , (France)
  • 4 Centro de Investigación Y Educación Superior de Ensenada (CICESE), Carretera Ensenada-Tijuana No. 3918, Zona Playitas, 22860, Ensenada, C.P, Mexico. , (Mexico)
  • 5 Instituto Politecnico Nacional, Centro Interdisciplinario de Ciencias Marinas, Av. IPN s/n. C.P. 23096, La Paz, Mexico. [email protected] , (Mexico)
Type
Published Article
Journal
Biological Trace Element Research
Publisher
Springer-Verlag
Publication Date
Jul 01, 2022
Volume
200
Issue
7
Pages
3400–3411
Identifiers
DOI: 10.1007/s12011-021-02932-7
PMID: 34599733
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Blue sharks (Prionace glauca) are an important resource in Ecuador's fisheries; however, biological and ecological information of this species in the area is scarce. The goal of this study was to determine Hg and Cd concentration levels in muscle tissue, as well as its relationship with size, sex, and sexual maturity stages. A total of 80 specimens (34 females and 46 males) collected from the Ecuadorian longline fishing fleet between June and December 2012 were examined. Sizes for females ranged from 97 to 280 cm total length, with values of Hg between 0.20 to 2.38 mg kg-1 wet weight (x̄ = 0.71, ± 0.61) and values of Cd between 0.01 and 0.12 mg kg-1 (x̄ = 0.04, ± 0.02). Sizes for males ranged from 137 to 290 cm TL with values of Hg between 0.17 and 2.94 mg kg-1 (x̄ = 0.81, ± 0.68) and Cd concentrations between 0.01 and 0.12 mg kg-1 (x̄ = 0.04, ± 0.03). A Spearman's rank correlation showed a medium positive association between TL and Hg concentrations (ρ = 0.66; p < 0.05), but there was no correlation between TL and Cd concentrations (ρ = 0.00, p < 0.05). Of the analyzed sharks, 46% and 20% had Hg and Cd concentrations, respectively, greater than the limit established by authorities for fishes consumed by humans. © 2021. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

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