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Journal of Clinical and Experimental Toxicology | Volume: 03 | ISSN: 2630-4570
alliedacademies
November 04-05, 2019 | Prague, Czech Republic
2nd World Congress on
TOXICOLOGY AND APPLIED PHARMACOLOGY
Assessment of Mercury and organochlorine pesticides concentration in turtles in
the Xingu River Basin, Brazil
Marina Teófilo Pignati
Federal University of Amapá, Brazil
Due to the toxicity and high environmental persistence
of organochlorine pesticides and mercury in aquatic
organisms, turtles have been studied as environment
biomonitors. These animals are important sources of
protein for the riverside and indigenous peoples of the
Brazilian amazon. Organochlorine pesticide and mercury
contamination was investigated in Podocnemis unifilis.
Liver, muscle and fatty tissue samples were removed from
50 specimens collected from five sampling points located
in the Xingu River basin, Brazil, and the total mercury
(THg) and organochlorine pesticides were analysed. Eight
organochlorine pesticides were detected with average
concentrations of ƩDDT, ƩEndossulfan and ƩHCH which
were 26.17 ± 26.35, 14.38 ± 23.77 and 1.39 ± 8.46 ng g-1
in moisture content, respectively. DDT compounds were the
most predominant, with a greater concentration of pp’-DDT
in the liver and pp’-DDD in the muscle. Significant differences
were noted between the types of tissues studied, and the
concentration of OCPs varied between sampling sites. The
liver and muscle samples contained 134.20 ± 119.30 ng.g-
1 THg and 24.86 ± 26.36 ng.g-1 THg, respectively. Each
chelonian or meal has, on average, 5.34x more Hg than the
highest level established as acceptable. From the results
it can be inferred that, given the weekly consumption of
chelonians, the riverine and indigenous communities in the
Xingu River Basin in Brazil are at risk of chronic consumption
of Hg in amounts beyond the acceptable limit. The potential
high risk to the health of this population is evident; however,
the risk classification needs to be further studied.
Biography
Marina Teófilo Pignati is graduate at Biology from Universidade
Federal de Mato Grosso (2008), Master´s in Zoology (2011) and has
completed her PhD in Zoology from Universidade Federal do Pará,
Brazil (2017). She is professor of Universidade Federal do Amapá,
Brazil. She has publications and experience in Zoology, acting on the
following subjects: Herpetology; Amazon turtle; Reproductive ecology;
Ecotoxicology; Pesticides and metals.
e:
Marina Teófilo Pignati, J Clin Exp Tox, Volume: 03
DOI: 10.35841/2630-4570-C2-009