PMID- 38522545 OWN - NLM STAT- MEDLINE DCOM- 20240417 LR - 20240417 IS - 1879-1026 (Electronic) IS - 0048-9697 (Linking) VI - 926 DP - 2024 May 20 TI - Organohalogen compounds in a hotspot for chemical pollution: Assessment in free-ranging Atlantic spotted dolphins (Stenella frontalis). PG - 171912 LID - S0048-9697(24)02055-2 [pii] LID - 10.1016/j.scitotenv.2024.171912 [doi] AB - The assessment of chemical pollution in free-ranging living mammals is viable using remote biopsies and portrays a comprehensive scenario of environmental health. The Southwestern Atlantic Ocean holds incredible biodiversity, but it is under the constant and invisible threat of persistent organic pollutants (POPs) of anthropogenic origin, such as pesticides, brominated flame retardants, and industrial-use compounds (e.g., PCBs). Thus, this study aimed to assess the bioaccumulation of POPs (PCBs, DDTs, HCB, mirex and PBDEs) and natural organobromine compounds (MeO-BDEs) using gas-chromatography coupled to mass spectrometry in biopsy samples of Atlantic spotted dolphins (Stenella frontalis, n = 20) that inhabit and forage both inside and in adjacent areas to degraded (Guanabara Bay) and conserved (Ilha Grande Bay) coastal bays in the Southeastern Brazil. Among the studied compounds, PCBs were predominant in the contamination profile with median concentration of 97.0 mug.g(-1) lipid weight (lw), followed by the sum of the p,p' isomers of DDT, DDD, and DDE of 11.0 mug.g(-1) lw, the brominated flame retardants PBDEs of 1.6 mug.g(-1) lw, and the other organochlorine pesticides mirex of 0.78 mug.g(-1) lw, and HCB of 0.049 mug.g(-1) lw. The MeO-BDEs were detected with a median concentration of 22.8 mug.g(-1) lw. 85 % of the Atlantic spotted dolphins analyzed in this study presented PCB concentration that exceeded even the less conservative threshold limits for adverse health effects (41 mug.g(-1) lw). This study shows that despite the conservation status of preserved bays, cetacean species foraging in these locations are still under increased threat. Hence chemical pollution demands local and global efforts to be mitigated. CI - Copyright (c) 2024 Elsevier B.V. All rights reserved. FAU - Oliveira-Ferreira, Nara AU - Oliveira-Ferreira N AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil; Programa de Pos-Graduacao em Ciencias Biologicas - Biofisica, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373, 21941-590 Rio de Janeiro, Rio de Janeiro, Brazil. Electronic address: nara.oliveiraferreira@gmail.com. FAU - Manhaes, Barbara M R AU - Manhaes BMR AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil. FAU - Santos-Neto, Elitieri AU - Santos-Neto E AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil. FAU - Carvalho, Rafael Ramos AU - Carvalho RR AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil. FAU - Cunha, Haydee Andrade AU - Cunha HA AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil. FAU - Azevedo, Alexandre Freitas AU - Azevedo AF AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil. FAU - Bisi, Tatiana Lemos AU - Bisi TL AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil. FAU - Lailson-Brito, Jose AU - Lailson-Brito J AD - Laboratorio de Mamiferos Aquaticos e Bioindicadores (MAQUA), Faculdade de Oceanografia, Universidade do Estado do Rio de Janeiro (UERJ), Rua Sao Francisco Xavier, 524, 20550-013, Rio de Janeiro, Rio de Janeiro, Brazil; Programa de Pos-Graduacao em Ciencias Biologicas - Biofisica, Instituto de Biofisica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373, 21941-590 Rio de Janeiro, Rio de Janeiro, Brazil. LA - eng PT - Journal Article DEP - 20240324 PL - Netherlands TA - Sci Total Environ JT - The Science of the total environment JID - 0330500 RN - DFC2HB4I0K (Polychlorinated Biphenyls) RN - Z917AN264P (Mirex) RN - 0 (Halogenated Diphenyl Ethers) RN - 0 (Flame Retardants) RN - 0 (Hydrocarbons, Chlorinated) RN - 0 (Pesticides) RN - 0 (Water Pollutants, Chemical) SB - IM MH - Animals MH - *Stenella/metabolism MH - *Polychlorinated Biphenyls/analysis MH - Mirex MH - Halogenated Diphenyl Ethers/analysis MH - *Flame Retardants/analysis MH - Gas Chromatography-Mass Spectrometry MH - *Hydrocarbons, Chlorinated/analysis MH - *Pesticides/analysis MH - Cetacea/metabolism MH - Environmental Monitoring MH - *Water Pollutants, Chemical/analysis OTO - NOTNLM OT - Brazilian waters OT - Cetaceans OT - Delphinids OT - MeO-BDEs OT - POPs COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2024/03/25 00:42 MHDA- 2024/04/17 06:42 CRDT- 2024/03/24 20:25 PHST- 2023/11/16 00:00 [received] PHST- 2024/03/18 00:00 [revised] PHST- 2024/03/21 00:00 [accepted] PHST- 2024/04/17 06:42 [medline] PHST- 2024/03/25 00:42 [pubmed] PHST- 2024/03/24 20:25 [entrez] AID - S0048-9697(24)02055-2 [pii] AID - 10.1016/j.scitotenv.2024.171912 [doi] PST - ppublish SO - Sci Total Environ. 2024 May 20;926:171912. doi: 10.1016/j.scitotenv.2024.171912. Epub 2024 Mar 24.