Preferential Liver Accumulation of Mercury Explains Low Concentrations in Muscle of Caiman yacare (Alligatoridae) in Upper Amazon

Andrea C. Salazar-Pammo, Dario Achá, Guido Miranda-Chumacero

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Caiman yacare is considered one of the top predators in the Amazon basin, and understanding pollutant distribution within its tissues may help its sustainable management. As a top predator, C. yacare should have the highest mercury concentrations, but has lower Hg concentrations than carnivorous fish (Rivera et al. 2016), which are part of their diet. We compared total Hg among liver, kidney, fat, and muscle of C. yacare, and whether trends in the distribution of Hg among tissues were like other crocodilians, aquatic birds, omnivorous, and carnivorous fish. Fat had the lowest concentrations (0.025 ± 0.03 mg kg−1) followed by muscle (0.15 ± 0.06 mg kg−1), kidney (0.57 ± 0.30 mg kg−1) and liver (1.81 ± 0.80 mg kg−1). Such preferential accumulation makes C. yacare meat a safer alternative for human consumption than carnivorous fish. The relation between Hg accumulation in liver and muscle is highest in crocodilians, which has evolutive and environmental implications.

Original languageEnglish
Pages (from-to)264-269
Number of pages6
JournalBulletin of Environmental Contamination and Toxicology
Volume106
Issue number2
DOIs
StatePublished - Feb 2021

Bibliographical note

Funding Information:
This work was supported by the Unidad de Calidad Ambiental (P.I.; D. Achá) of the Instituto de Ecología, Universidad Mayor de San Andrés (UMSA) and the Master program in Biology of the same University. This work was performed within the young research associate team “JEAI TITICACA” (P.I.; D. Achá) supported by the French Institute National Research for Sustainable Development (IRD). Field sampling was possible thanks to the funding and continues support of the Wildlife Conservation Society (WCS). We extend our particular thanks to Consejo Indígena del Pueblo Tacana (CIPTA) and Matusha Aidha Association of Caiman managers in Cachichira community. We would also like to thanks Gustavo Álvarez and José Luis Mollericona for their help during sampling.

Funding Information:
This work was supported by the Unidad de Calidad Ambiental (P.I.; D. Ach?) of the Instituto de Ecolog?a, Universidad Mayor de San Andr?s (UMSA) and the Master program in Biology of the same University. This work was performed within the young research associate team ?JEAI TITICACA? (P.I.; D. Ach?) supported by the French Institute National Research for Sustainable Development (IRD). Field sampling was possible thanks to the funding and continues support of the Wildlife Conservation Society (WCS). We extend our particular thanks to Consejo Ind?gena del Pueblo Tacana (CIPTA) and Matusha Aidha Association of Caiman managers in Cachichira community. We would also like to thanks Gustavo ?lvarez and Jos? Luis Mollericona for their help during sampling.

Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.

Keywords

  • Crocodilian
  • Mercury decontamination
  • Mercury in kidney
  • Sustainable management

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