Mercury and selenium in the filter–feeding whale shark (Rhincodon typus) from two areas of the Gulf of California, Mexico

Francesca Pancaldi, Felipe Galván-Magaña, Rogelio González-Armas, Martin F. Soto-Jimenez, Darren A. Whitehead, Todd O'Hara, A. J. Marmolejo-Rodríguez, Abraham Vázquez-Haikin, Federico Páez-Osuna

Research output: Contribution to journalArticle

Abstract

Mercury and selenium were measured for first time in the endangered species whale shark (Rhyncodon typus) from two areas of the Gulf of California, Bahía Los Angeles (BLA) and Bahía La Paz (LAP) using dermal biopsies of seventy specimens. Additionally, nineteen zooplankton samples from LAP were analysed. Concentrations (ng/g, wet weight (ww)) in biopsies of BLA ranged from 1 to 40 for Hg and 100 to 680 for Se; while in LAP varied from 1 to 9 for Hg and 11 to 850 for Se. A positive correlation was found for Hg in BLA males biopsies with length. Hg and Se concentrations in the zooplankton from LAP were 1.6 ± 1.8 and 770 ± 930 ng/g, respectively. Hg biomagnification factor ranged from 0.8 to 5.3 in sharks. A molar excess of Se over Hg was found in the biopsies and the zooplankton.

Original languageEnglish
Pages (from-to)955-961
Number of pages7
JournalMarine Pollution Bulletin
Volume146
DOIs
StatePublished - Sep 2019

Fingerprint

Biopsy
Gulf of California
Selenium
shark
selenium
whale
mercury
biopsy
zooplankton
Mexico
endangered species
bioaccumulation
sharks
Rhincodon typus
gulf
sampling

Keywords

  • Bioaccumulation
  • Biomagnification
  • Biopsies
  • Gulf of California Mexico
  • Molar ratio of Hg and Se
  • Zooplankton

Cite this

Pancaldi, Francesca ; Galván-Magaña, Felipe ; González-Armas, Rogelio ; Soto-Jimenez, Martin F. ; Whitehead, Darren A. ; O'Hara, Todd ; Marmolejo-Rodríguez, A. J. ; Vázquez-Haikin, Abraham ; Páez-Osuna, Federico. / Mercury and selenium in the filter–feeding whale shark (Rhincodon typus) from two areas of the Gulf of California, Mexico. In: Marine Pollution Bulletin. 2019 ; Vol. 146. pp. 955-961.
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Mercury and selenium in the filter–feeding whale shark (Rhincodon typus) from two areas of the Gulf of California, Mexico. / Pancaldi, Francesca; Galván-Magaña, Felipe; González-Armas, Rogelio; Soto-Jimenez, Martin F.; Whitehead, Darren A.; O'Hara, Todd; Marmolejo-Rodríguez, A. J.; Vázquez-Haikin, Abraham; Páez-Osuna, Federico.

In: Marine Pollution Bulletin, Vol. 146, 09.2019, p. 955-961.

Research output: Contribution to journalArticle

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AU - Galván-Magaña, Felipe

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AU - O'Hara, Todd

AU - Marmolejo-Rodríguez, A. J.

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