4.7 Article

Persistent organic pollutants in plasma and stable isotopes in red blood cells of Caretta caretta, Chelonia mydas and Lepidochelys olivacea sea turtles that nest in Brazil

Journal

MARINE POLLUTION BULLETIN
Volume 167, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2021.112283

Keywords

Polychlorinated biphenyls; Organochlorinated pesticides; Green turtle; Loggerhead; Olive ridley; Marine turtles

Funding

  1. BW Consultoria Veterinaria
  2. IGUI Ecologia
  3. Foundation for Research Support of the State of Sao Paulo (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo - FAPESP) [2016/18348-1]
  4. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) [001]

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Studies on persistent organic pollutants (POPs) in sea turtles have reported spatial data gaps globally. Investigation on blood plasma of different sea turtle species in Brazil revealed varying levels of POP contamination, with loggerhead turtles having the highest concentrations. Stable isotopes analysis showed differences in trophic ecology among species.
Studies of persistent organic pollutants (POPs), such as polychlorinated biphenyls (PCBs), organochlorinated pesticides (OCPs), and polybrominated diphenyl ethers (PBDEs), in sea turtles are reported, but there are still spatial data gaps worldwide. POP contamination of live female blood plasma from Caretta caretta (n = 28), Chelonia mydas (n = 31) and Lepidochelys olivacea (n = 19), which nest in Brazil and feed along the South Atlantic Ocean, was investigated. Carbon and nitrogen stable isotopes from red blood cells (RBC) were also evaluated to obtain information about trophic ecology. C. caretta had the highest POP concentrations, followed by L. olivacea and C. mydas. PCBs predominated in all species, and the major OCPs were the DDTs (dichlorodiphenyltrichloroethane and derivatives) and Lindane. POPs and stable isotopes revealed intra- and interspecific variations, which reflect the high plasticity in the use of habitat and food resources, making individuals within the same population susceptible to different exposures to pollutants.

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