Seahorse (Hippocampus reidi) as a bioindicator of crude oil exposure

Delunardo, Frederico Augusto Cariello; Carvalho, Luciano R.; Silva, Bruno Ferreira da; Galão, Michel; Val, Adalberto Luís; Chippari-Gomes, Adriana Regina

doi:10.1016/j.ecoenv.2015.03.016

Cited by 23 publications

(3 citation statements)

References 63 publications

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“…PAHs in oil may also damage DNA through the formation of ROS, especially highly reactive OH radicals (Nahrgang et al 2010;Shugart 1998). Delunardo (2015) demonstrated that the amount of DNA damage was linked to increased concentrations of crude oil. In the present study, results from the alkaline unwinding assay revealed an increase in DNA damage in both doses of assayed crude oil compared with that in the control group (Fig.…”

Section: Discussionmentioning

confidence: 99%

Assessment of the toxicity of crude oil inSinonovacula constrictaclams

Shen

Jiang

2015

Aquat. Living Resour.

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This study is aimed at investigating the toxic effects on clams (Sinonovacula constricta) exposed to selected concentrations of individual crude oil: water accommodated fraction (WAF) and chemically enhanced (or dispersed) WAF (CEWAF). For this purpose, a study was performed on clams exposed to 0.04 mg L −1 and 0.01 mg L −1 WAF and CEWAF for 15 days, using parameters of antioxidant defense and oxidative damage. The accumulation of total petroleum hydrocarbon (TPH) in the gills of clams was dependent on time and dose, and CEWAF accumulation was higher than WAF accumulation. Exposure of clams to CEWAF oil resulted in significantly (p < 0.05) elevated ethoxyresorufin-O-deethylase (EROD) activity compared with exposure to controls. The level of EROD induction was concentration-related, as indicated by the induction observed in clams exposed to higher concentrations of CEWAF. Oxidative damage indicators (DNA strand breaks) were also measured in gills to assess the effects of the selected crude oil by alkaline unwinding assay. Results showed that DNA damage was significantly induced, except in the low-level groups of WAF, and different trends were detected with time of exposure. Significant correlations between TPH uptake and both EROD activity and DNA damage can be used as suitable tools for integrated levels of study on the biomarkers of crude oil exposure.

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Section: Discussionmentioning

confidence: 99%

Assessment of the toxicity of crude oil inSinonovacula constrictaclams

Shen

Jiang

2015

Aquat. Living Resour.

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“…Seahorse reproductive rate, even under optimal conditions, is low because of the small brood size and lengthy parental care. Consequently, seahorses are on the local, international, and IUCN Red List of Threatened Species [60], becoming a bioindicator of crude oil exposure [61]. Studies of the effects of ocean warming and acidification on the physiology and behavior of the long-snouted seahorse Hippocampus guttulatus, which has been recently added to list of threatened and/or declining species by the Oslo and Paris (OSPAR) commission, showed that although the adults are quite resistant to ocean warming, the combination of warming and acidification (caused by CO 2 uptake from the atmosphere) causes lethargy and reduction in feeding and gill ventilation rates [62].…”

Section: Effects Of Environmental Changes and Pollutants On Seahorsesmentioning

confidence: 99%

Seahorse Male Pregnancy as a Model System to Study Pregnancy, Immune Adaptations, and Environmental Effects

Kloc

2023

IJMS

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Seahorses, together with sea dragons and pipefishes, belong to the Syngnathidae family of teleost fishes. Seahorses and other Syngnathidae species have a very peculiar feature: male pregnancy. Among different species, there is a gradation of paternal involvement in carrying for the offspring, from a simple attachment of the eggs to the skin surface, through various degrees of egg coverage by skin flaps, to the internal pregnancy within a brood pouch, which resembles mammalian uterus with the placenta. Because of the gradation of parental involvement and similarities to mammalian pregnancy, seahorses are a great model to study the evolution of pregnancy and the immunologic, metabolic, cellular, and molecular processes of pregnancy and embryo development. Seahorses are also very useful for studying the effects of pollutants and environmental changes on pregnancy, embryo development, and offspring fitness. We describe here the characteristics of seahorse male pregnancy, its regulatory mechanisms, the development of immune tolerance of the parent toward the allogeneic embryos, and the effects of environmental pollutants on pregnancy and embryo development.

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“…The seahorse is an important environmental indicator organism (Alves et al, 2013;Delunardo et al, 2015;Chipari-Gomes et al, 2017), and has an important place in ornamental aquarium (Vincent et al, 2011;Foster et al, 2016;Koning and Hoeksema, 2021). Seahorses primarily inhabit shallow coastal areas and are often found in seagrass beds, benthic algae, coral reefs, and mangroves (Barboza et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Bioaccumulation of contaminants in wild seahorses collected from coastal China

et al. 2022

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Eighty-four wild seahorses, including three of China’s dominant species, were collected from seven coastal provinces to evaluate their common contaminant contents. Heavy metals (including Cu, Pb, Cd, Cr, and Hg), Benzo(a)pyrene (B[a]P), and microplastics were detected in the collected seahorses. The results indicate that considerable contamination variations are present in seahorses from different regions and species. Elevated concentrations of Cu and Cr, compared to other heavy metals, were observed in most sampled locations. In addition, B[a]P concentrations were far greater in Hippocampus mohnikei and H.trimaculatus compared with H.kelloggi (P < 0.05). Substantial changes in microplastic concentrations were also observed in seahorses from different locations, and significant differences were observed between sampled species (P < 0.05). Further, a correlation analysis obtained strong correlations among four heavy metals (Cu, Pb, Cd, and Cr), except Hg. A significant correlation was identified between B[a]P and microplastics (P < 0.01), suggesting potential synergistic effects between these two contaminants. In brief, this study indicates that wild seahorse populations are experiencing environmental pollution.

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Seahorse (Hippocampus reidi) as a bioindicator of crude oil exposure

Cited by 23 publications

References 63 publications

Assessment of the toxicity of crude oil inSinonovacula constrictaclams

Assessment of the toxicity of crude oil inSinonovacula constrictaclams

Seahorse Male Pregnancy as a Model System to Study Pregnancy, Immune Adaptations, and Environmental Effects

Bioaccumulation of contaminants in wild seahorses collected from coastal China

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