Food preferences and Hg distribution in Chelonia mydas assessed by stable isotopes.

Autor: Bezerra MF; Laboratório de Biogeoquímica Costeira, Instituto de Ciências do Mar, Universidade Federal do Ceará, Av. Abolição 3207, Fortaleza, CE, 60165-081, Brazil. Electronic address: mmoisesfb@hotmail.com., Lacerda LD; Laboratório de Biogeoquímica Costeira, Instituto de Ciências do Mar, Universidade Federal do Ceará, Av. Abolição 3207, Fortaleza, CE, 60165-081, Brazil., Rezende CE; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, RJ, 28013-602, Brazil., Franco MA; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, RJ, 28013-602, Brazil., Almeida MG; Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego, 2000, Parque Califórnia, Campos dos Goytacazes, RJ, 28013-602, Brazil., Macêdo GR; Brazilian Center for the Protection and Research of Sea Turtles Foundation (Pro-Tamar Foundation), Salvador, Bahia, Brazil., Pires TT; Brazilian Center for the Protection and Research of Sea Turtles Foundation (Pro-Tamar Foundation), Salvador, Bahia, Brazil., Rostán G; Brazilian Center for the Protection and Research of Sea Turtles Foundation (Pro-Tamar Foundation), Salvador, Bahia, Brazil., Lopez GG; Brazilian Center for the Protection and Research of Sea Turtles Foundation (Pro-Tamar Foundation), Salvador, Bahia, Brazil.
Jazyk: angličtina
Zdroj: Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2015 Nov; Vol. 206, pp. 236-46. Date of Electronic Publication: 2015 Jul 18.
DOI: 10.1016/j.envpol.2015.07.011
Abstrakt: Mercury (Hg) is a highly toxic pollutant that poses in risk several marine animals, including green turtles (Chelonia mydas). Green turtles are globally endangered sea turtle species that occurs in Brazilian coastal waters as a number of life stage classes (i.e., foraging juveniles and nesting adults). We assessed total Hg concentrations and isotopic signatures ((13)C and (15)N) in muscle, kidney, liver and scute of juvenile green turtles and their food items from two foraging grounds with different urban and industrial development. We found similar food preferences in specimens from both areas but variable Hg levels in tissues reflecting the influence of local Hg backgrounds in food items. Some juvenile green turtles from the highly industrialized foraging ground presented liver Hg levels among the highest ever reported for this species. Our results suggest that juvenile foraging green turtles are exposed to Hg burdens from locally anthropogenic activities in coastal areas.
(Copyright © 2015 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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