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Boldrocchi G, Monticelli D, Bettinetti R. To what extent are filter feeder elasmobranchs exposed to marine pollution? A systematic review. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 318:120881. [PMID: 36528198 DOI: 10.1016/j.envpol.2022.120881] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 12/12/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
Filter feeding elasmobranchs may be considered as biological indicators of marine pollution, despite most of these species are under some degree of extinction risk. Among threats to this taxonomic group, marine pollution might represent an additional concern for their survival. In this review, a comprehensive systematic search of scientific literature on pollutants in filter feeding elasmobranchs was conducted to evaluate the bioaccumulation patterns, and risk for human consumers. We found that, despite an increasing trend in the number of published studies, the geographical coverage is still very limited and most of the studies focused solely on trace elements (70.8%). Among sharks, Rhincodon typus was the most represented species (66.7%), while Mobula mobular the most studied ray species (41.7%). Comparing the levels of pollutants in filter feeders between ocean basins, this review highlighted that Hg, As and Cd levels are mostly higher in those areas affected by both strong natural and anthropogenic source of emissions, such as the Indian Ocean. With regards to OCs, ΣPCB levels in muscle of C. maximus were between 4.3 and 50.5 μg kg-1 ww, highlighting a persistent contamination of PCB in the Mediterranean Sea. Some species exceeded the maximum allowable limits for foodstuff consumption for As, Cd and Pb. A total of 77.8% of the analyzed species exceeded the Environmental Quality Standards for Hg, while they were always below the EQSbiota for HCB, PBDEs, PFOS and DDT. Given their feeding mechanism that continuously samples the marine environment, further investigations are urgently needed to determine not only the extent of contaminant exposure in different hotspot locations but also the risks posed to the elasmobranch health.
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Affiliation(s)
- G Boldrocchi
- Department of Human Sciences, Innovation and Territory, University of Insubria, Via Valleggio 11, Como, Italy.
| | - D Monticelli
- Department of Science and High Technology, University of Insubria, Via Valleggio 11, Como, Italy
| | - R Bettinetti
- Department of Human Sciences, Innovation and Territory, University of Insubria, Via Valleggio 11, Como, Italy
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New Occurrences of the Tiger Shark ( Galeocerdo cuvier) (Carcharhinidae) off the Coast of Rio de Janeiro, Southeastern Brazil: Seasonality Indications. Animals (Basel) 2022; 12:ani12202774. [PMID: 36290161 PMCID: PMC9597784 DOI: 10.3390/ani12202774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 11/24/2022] Open
Abstract
The tiger shark Galeocerdo cuvier (Péron & Lesueur, 1822) (Carcharhinidae) is classified as near-threatened along the Brazilian coast, in line with its global categorization. Although Rio de Janeiro, located in southeastern Brazil, is internationally identified as a priority shark conservation area, many shark species, including tiger sharks, are landed by both industrial and artisanal fisheries in this state. However, there is a lack of detailed information on the species capture pressures and records for the state of Rio de Janeiro. Therefore, the aims of this study were to expand the tiger shark record database and to improve upon future conservation and management strategies. Tiger shark records from four coastal Rio de Janeiro regions were obtained by direct observation. The information obtained from fishery colonies/associations, environmental guards, researchers, and scientific articles, totaling 23 records, resulted in an approximately 5-fold increase in the number of tiger shark records off the coast of the state of Rio de Janeiro. A possible seasonality pattern concerning the size of the captured/observed animals was noted, emphasizing the need to consider the coast of Rio de Janeiro as an especially relevant area for at least part of the life history of tiger sharks.
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Ehemann N, Acosta-Rodríguez E, Tagliafico A, Pelletier N, Stevens G. Manta and devil ray species occurrence and distribution in Venezuela, assessed through fishery landings and citizen science data. JOURNAL OF FISH BIOLOGY 2022; 101:213-225. [PMID: 35575221 DOI: 10.1111/jfb.15088] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Manta and devil rays (collectively mobulids) belong to the monogeneric Mobulidae, which currently comprises 10 species, including a putative third manta ray species (Mobula cf. birostris). These large planktivorous rays are distributed throughout the tropical and subtropical oceans of the world. To date, six mobulid species are reported for the western Atlantic Ocean and the Caribbean Sea, three of which had previously been reported in Venezuela (Mobula birostris, Mobula tarapacana and Mobula hypostoma). A preliminary assessment of fishery landings and citizen science data was conducted to further the scientific knowledge of mobulid species in Venezuela. Fisheries landing data were collected at Margarita Island between 2006 and 2007, and again in 2014. Data mining of internet search engines and social media platforms spanning the past two decades was also conducted. A total of 117 individuals of five mobulid species were recorded: Mobula sp. (n = 27), M. birostris (n = 36), M. tarapacana (n = 3), Mobula mobular (n = 26), Mobula thurstoni (n = 14) and M. cf. birostris (n = 11). The latter three species are the first confirmation of these species in Venezuela. The authors found no records of the previously reported M. hypostoma during this study. Although the occurrence of M. hypostoma in Venezuela remains possible because of the broad regional range of this species, its current presence in Venezuela is invalidated given the repeated misidentifications which have occurred in previous publications. The results of this study increase the number of reported mobulid ray species in Venezuela to five (excluding M. hypostoma). The overall data from juvenile manta rays and pregnant M. mobular and M. thurstoni recorded in this study, combined with the occurrence of all but one species of mobulid ray found in the western Atlantic Ocean, suggest Venezuela provides important habitat for this threatened family of rays.
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Affiliation(s)
- Nicolás Ehemann
- Instituto Politécnico Nacional - Centro Interdisciplinario de Ciencias Marinas (CICIMAR-IPN), La Paz, Mexico
- Universidad de Oriente - Escuela de Ciencias Aplicadas del Mar Núcleo Nueva Esparta, Calle Principal - La Marina, Boca del Río, Venezuela
- Proyecto Iniciativa Batoideos (PROVITA), Calle La Joya con Avenida Libertador, Unidad Técnica del Este, Caracas, Venezuela
| | - Edilia Acosta-Rodríguez
- Universidad de Oriente - Escuela de Ciencias Aplicadas del Mar Núcleo Nueva Esparta, Calle Principal - La Marina, Boca del Río, Venezuela
| | - Alejandro Tagliafico
- Universidad de Oriente - Escuela de Ciencias Aplicadas del Mar Núcleo Nueva Esparta, Calle Principal - La Marina, Boca del Río, Venezuela
- National Marine Science Centre, Southern Cross University, Coffs Harbour, NSW, Australia
| | | | - Guy Stevens
- The Manta Trust, Catemwood House, Norwood Lane, Dorchester, UK
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Machado AA, Moraes FCD, Aguiar AA, Hostim-Silva M, Santos LN, Bertoncini ÁA. Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region. NEOTROPICAL ICHTHYOLOGY 2022. [DOI: 10.1590/1982-0224-2022-0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Abstract Coastal islands of Grande Rio, located south Rio de Janeiro and Maricá cities have been under multiple anthropogenic impacts. Despite these problems, these insular systems shelter a high diversity of fish species. Reef fishes are essential components of tropical marine coastal communities, also providing food and income for millions of people around the world. In this work, we generated an updated checklist from Cagarras Islands Natural Monument and surrounding areas based on fisheries data, literature records and multiple sampling techniques, including the Submersible Rotating Video technique, used for the first time in Brazil. We present an inventory of 282 fish species representing 91 different families, with 21 new records for the study area, including a non-native species (Heniochus acuminatus). In addition, our results show a moderate endemism level for the Brazilian province (approximately 6.0%), while 10.5% of species are assigned to one of IUCN’s threatened categories. Our efforts show the fish biodiversity scenario and their distribution on coastal islands more than 10 years after the Cagarras Islands Natural Monument establishment, reinforcing the importance of monitoring research programs for the management of this Marine Protected Area and surrounding waters, that play a key role for artisanal fisheries.
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Affiliation(s)
- Augusto A. Machado
- Universidade Federal do Espírito Santo, Brazil; Instituto Mar Adentro, Brazil
| | | | | | | | - Luciano N. Santos
- Universidade Federal do Estado do Rio de Janeiro (UNIRIO), Brazil; Universidade Federal do Estado do Rio de Janeiro, Brazil
| | - Áthila A. Bertoncini
- Instituto Mar Adentro, Brazil; Universidade Federal do Estado do Rio de Janeiro, Brazil; Universidade Federal de Santa Catarina, Brazil
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Wosnick N, Chaves AP, Leite RD, Nunes JLS, Saint'Pierre TD, Willmer IQ, Hauser-Davis RA. Nurse sharks, space rockets and cargo ships: Metals and oxidative stress in a benthic, resident and large-sized mesopredator, Ginglymostoma cirratum. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 288:117784. [PMID: 34329051 DOI: 10.1016/j.envpol.2021.117784] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/15/2021] [Accepted: 07/10/2021] [Indexed: 06/13/2023]
Abstract
It is widely recognized that apex predators, such as large sharks with highly migratory behavior, are particularly vulnerable to pollution, mainly due to biomagnification processes. However, in highly impacted areas, mesopredator sharks with resident behavior can be as vulnerable as apex sharks. In this context, this study evaluated cadmium (Cd), mercury (Hg), lead (Pb), and rubidium (Rb) concentrations, as well as the potentially protective effects of selenium (Se) and the behavior of two non-enzymatic biomarkers, metallothionein (MT) and reduced glutathione (GSH), employing the Atlantic nurse shark Ginglymostoma cirratum as a study model and compared the results with other resident benthic sharks, as well as highly mobile apex sharks. Muscle tissue samples from 28 nurse sharks opportunistically sampled from the Brazilian Amazon Coast were analyzed. Lower metal concentrations were observed for Pb, Rb and Se in the rainy season, while statistically significant correlations between metals were observed only between Hg and Cd and Pb and Se. Molar ratio calculations indicate potential protective Se effects against Pb, but not against Cd and Hg. No associations between MT and the determined metals were observed, indicating a lack of detoxification processes via the MT detoxification route. The same was noted for GSH, indicating no induction of this primary cellular antioxidant defense. Our results indicate that benthic/mesopredator sharks with resident behavior are, in fact, as impacted as highly mobile apex predators, with the traditional detoxification pathways seemingly inefficient for the investigated species. Moreover, considering the studied population and other literature data, pollution should be listed as a threat to the species in future risk assessments.
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Affiliation(s)
- Natascha Wosnick
- Programa de Pós-Graduação em Zoologia, Universidade Federal do Paraná, Paraná, Brazil
| | - Ana Paula Chaves
- Analytical and System Toxicology Laboratory, Faculdade de Ciências Farmacêuticas de Ribeirão Preto (USP), São Paulo, Brazil
| | - Renata Daldin Leite
- Programa de Pós-Graduação em Zoologia, Universidade Federal do Paraná, Paraná, Brazil
| | | | | | - Isabel Quental Willmer
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Centro de Ciências da Saúde, Instituto de Biologia, Departamento de Biologia Marinha, Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, Brazil.
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