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Díaz-Delgado E, Girolametti F, Annibaldi A, Trueman CN, Willis TJ. Mercury bioaccumulation and its relationship with trophic biomarkers in a Mediterranean elasmobranch mesopredator. MARINE POLLUTION BULLETIN 2024; 201:116218. [PMID: 38531207 DOI: 10.1016/j.marpolbul.2024.116218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/28/2024]
Abstract
Human activity has led to increased concentrations of mercury (Hg) in the world's oceans. Mercury can bioaccumulate and biomagnify in animal tissues via trophic transfer, thus, becoming most pronounced in larger and older predators. Here, we measured Hg concentrations and their relationship with stable isotopes-based proxies of trophic level (δ13C and δ15N values) in multiple tissues of Mustelus spp. from the Mediterranean Sea. We found higher Hg concentrations in muscle than in liver and fin tissues. The relationship between Hg concentrations and δ15N values in muscle suggested repeated foraging for low trophic level and Hg-poor prey, and biomagnification of Hg at higher trophic levels. Seasonal variations in δ13C values could indicate shifts in primary production sources and/or in local prey availability. The HBVSe index suggested no risk to human health, however the safe meal limit recommendations are 4.5 and 2.2 portions per month for adults and children, respectively.
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Affiliation(s)
- Eric Díaz-Delgado
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Fano Marine Center, Viale Adriatico 1/N, 61032 Fano, Italy.
| | - Federico Girolametti
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Anna Annibaldi
- Department of Life and Environmental Sciences, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy
| | - Clive N Trueman
- Ocean and Earth Science, University of Southampton, Southampton SO143ZH, UK
| | - Trevor J Willis
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Fano Marine Center, Viale Adriatico 1/N, 61032 Fano, Italy
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Investigating an Unknown Biodiversity: Evidence of Distinct Lineages of the Endemic Chola Guitarfish Pseudobatos percellens Walbaum, 1792 in the Western Atlantic Ocean. DIVERSITY 2023. [DOI: 10.3390/d15030344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Anthropogenic actions have affected marine species for a long time, through overexploitation of natural stocks and habitat degradation, influencing the life strategies of several taxa, especially rays and sharks, which have suffered significant population declines in recent years. Therefore, conservation actions and stock management have become paramount. In this regard, chola guitarfish, Pseudobatos percellens, distributed throughout the Brazilian coast, is often commercially fished by local artisanal fleets or as by-catch in shrimp trawl fisheries. Therefore, this study aimed to understand the genetic diversity of P. percellens throughout the Brazilian coast, using single nucleotide polymorphisms (SNPs). Genetic analyses employing 3329 SNPs revealed a hidden biodiversity within P. percellens, with at least one lineage occurring in the Northern and Northeastern regions and another distributed in the Southeastern/Southern Brazilian coast, with high genetic differentiation between them. However, the Discriminant Analysis of Principal Components (DAPC) indicated the presence of in fact three lineages distributed in these regions that must still be better investigated. Therefore, to ensure adequate conservation of chola guitarfish biodiversity, populations must be managed separately along the Brazilian coast. Furthermore, the need for a taxonomic review for this group is noted.
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Martins MF, Costa PG, Bianchini A. Assessing multigenerational exposure to metals in elasmobranchs: Maternal transfer of contaminants in a yolk-sac viviparous species. MARINE POLLUTION BULLETIN 2022; 175:113364. [PMID: 35093781 DOI: 10.1016/j.marpolbul.2022.113364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/13/2022] [Accepted: 01/16/2022] [Indexed: 06/14/2023]
Abstract
This study aimed to assess the maternal offloading of metals in the Brazilian guitarfishPseudobatos horkelii through determining essential (Cr, Cu, Fe) and non-essential (Cd, Hg, Pb) metal concentrations along two generations of this species: pregnant females and offspring. The maximum transfer capacity (ECER) and offspring/mother ratio were calculated to estimate the extent of offloading, as well as the proportion of contaminants presented in offspring related to the maternal concentrations. Transfer efficiency was element-dependent. Chromium had the highest ECER (99.7%), followed by Hg (67.7%). Other essential metals were less transferred (9.6-35.6%) and Cd and Pb were not detected in uterine content samples. The relationships between maternal length and concentration, as well as transfer capacity were not significant, indicating that females might be continuously exposed, and that offloading might not excrete metals efficiently. On the other hand, embryos are exposed to these elements which could impair embryonic development.
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Affiliation(s)
- Mariana F Martins
- Programa de Pós-Graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900, Rio Grande, Brazil.
| | - Patrícia G Costa
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900, Rio Grande, Brazil
| | - Adalto Bianchini
- Instituto de Ciências Biológicas, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8, 96203-900, Rio Grande, Brazil
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Maciel OLDC, Willmer IQ, Saint'Pierre TD, Machado W, Siciliano S, Hauser-Davis RA. Arsenic contamination in widely consumed Caribbean sharpnose sharks in southeastern Brazil: Baseline data and concerns regarding fisheries resources. MARINE POLLUTION BULLETIN 2021; 172:112905. [PMID: 34523430 DOI: 10.1016/j.marpolbul.2021.112905] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/16/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
Although shark meat is consumed worldwide, elevated arsenic (As) concentrations have been increasingly reported. The Caribbean sharpnose shark (Rhizoprionodon porosus) is a widely consumed fishing resource in Brazil, with scarce information on As burdens to date. Herein, commercial-sized juvenile Caribbean sharpnose sharks from Rio de Janeiro (Brazil) were assessed in this regard, presenting significantly higher hepatic As concentrations in males (8.24 ± 1.20 mg kg-1 wet weight; n = 12) compared to females (6.59 ± 1.87 mg kg-1 w.w.; n = 8), and a positive correlation (r = 0.74) was noted between female muscle and liver As concentrations, indicating systemic inter-tissue transport not evidenced in males. Arsenic concentrations were over the maximum permissible As limit established in Brazilian legislation for seafood and calculated Target Hazard Quotients suggest consumption risks, although cancer risks were not evidenced. Therefore, Public Health concerns with regard to Caribbean sharpnose shark As burdens deserve careful attention.
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Affiliation(s)
- Oswaldo Luiz de C Maciel
- Fundação Instituto da Pesca do Estado do Rio de Janeiro (FIPERJ), 24030-020 Niterói, RJ, Brazil; Programa de Pós-Graduação em Geociências (Geoquímica), Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil.
| | - Isabel Q Willmer
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz (Fiocruz), 21040-360 Rio de Janeiro, RJ, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Universidade do Rio de Janeiro (UFRJ), 21941-902 Rio de Janeiro, RJ, Brazil
| | - Tatiana D Saint'Pierre
- Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), 22453-900 Rio de Janeiro, RJ, Brazil
| | - Wilson Machado
- Programa de Pós-Graduação em Geociências (Geoquímica), Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil; Laboratório de Geoquímica do Antropoceno, Departamento de Geoquímica, Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil.
| | - Salvatore Siciliano
- Grupo de Estudos de Mamíferos Marinhos da Região dos Lagos (GEMM-Lagos), 28970-000 Araruama, RJ, Brazil; Fundação Oswaldo Cruz (Fiocruz), Av. Brasil, 4.365, Manguinhos, 21040-900 Rio de Janeiro, RJ, Brazil
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz (Fiocruz), 21040-360 Rio de Janeiro, RJ, Brazil.
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