Stress response markers in the blood of São Tomé green sea turtles (Chelonia mydas) and their relation with accumulated metal levels

Morão, Inês F. C.; Lemos, Marco F.L.; Félix, Rafael; Vieira, Sara; Barata, Carlos; Novais, Sara C.

doi:10.1016/j.envpol.2021.118490

Cited by 18 publications

(5 citation statements)

References 99 publications

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“…The concentration levels in different tissues and eggs of Caretta caretta are shown in Table 1 (V, Co, Cu, B, Mn, Zn, Fe, Se, Cr, Ni, Sn, As, Ba, Hg, Ag, Sb, Cd, Pb). All concentration values are reported in dry weight (d.w.) and the acronym BLQ refers to values below the limit of quantification as reported by Faust et al [27] and Morão et al [28]. The concentration values of other works mentioned for comparison purposes and originally expressed in wet weight were converted to dry weight, assuming a percentage of the water content for each tissue as reported by Ross et al [4].…”

Section: Analysis Of Heavy Metals On Turtle Samples C Carettamentioning

confidence: 99%

Impact of Heavy Metals in Eggs and Tissues of C. caretta along the Sicilian Coast (Mediterranean Sea)

et al. 2022

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In this study we compared the heavy metal concentration found in different tissues and eggs of the loggerhead sea turtle and evaluated the potential ecotoxicological risk for this important species. Eighteen heavy metal elements were determined in different tissues (liver, gonads, fat, kidney, heart, brain, and spleen) of nine individuals of Caretta caretta found stranded along the coasts of Messina (Sicily, Italy) and in the shell and yolk of six eggs from the island of Linosa (Sicily, Italy). For the analysis of the heavy metals, we used the analytical procedures in accordance with the EPA 200.8 method supplemented by EPA 6020b with three replicates for each measurement. The elements analysed showed different organotropism even if the liver showed higher levels of bioaccumulation. Turtles’ tissues showed the highest values of iron in the liver, followed by zinc in the heart and arsenic in the kidney. Regarding eggs, zinc, iron, and barium were dominant in the yolk and iron, boron, and copper in the eggshell. From the analyses carried out the worrying levels of arsenic and cadmium in the kidneys and liver of C. caretta raise questions about the risk related to exposure to these non-essential elements. This study highlights the importance of multi-element biomonitoring by increasing knowledge on the biodistribution of 18 heavy metals and the related potential risks for C. caretta. We also exploring for the first time the presence of several heavy metals in the eggs and their possible implication for the survival of the species.

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Section: Analysis Of Heavy Metals On Turtle Samples C Carettamentioning

confidence: 99%

Impact of Heavy Metals in Eggs and Tissues of C. caretta along the Sicilian Coast (Mediterranean Sea)

et al. 2022

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“…Most of the studies dealing with the issue of heavy metals and their impact on the health status of turtles and tortoises follow wild populations of animals. It is important to note that there are many complex factors and relationships that occur at the transcriptional level [ 73 ]. However, there are no toxicity threshold values for metals in turtles and tortoises, and non-essential elements such as Al, As, Cd, Cr, Hg, and Pb are toxic even at lower concentrations in different organisms [ 74 ].…”

Section: Discussionmentioning

confidence: 99%

“…However, there are no toxicity threshold values for metals in turtles and tortoises, and non-essential elements such as Al, As, Cd, Cr, Hg, and Pb are toxic even at lower concentrations in different organisms [ 74 ]. Iron is important in processes such as blood production, DNA synthesis, cellular respiration, and cell growth, as well as proliferation [ 73 , 75 , 76 ]. On the contrary, Pietrangelo [ 77 ] reported that high levels of iron can exchange electrons with a wide variety of substrates that may also lead to the formation of ROS.…”

Section: Discussionmentioning

confidence: 99%

Biogenic Elements and Heavy Metals in Hermann’s Tortoises—Testudo hermanni: Effect on Serum Biochemistry and Oxidative Status Parameters

Kirchner,

Kirchnerová,

Tirpák

et al. 2023

Animals

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Background: Conservation of species diversity is the need of the hour for preserving life forms on Earth. Extinction of any part of the ecosystem has negative impacts on many processes and systems. The objective of this work was to analyze some biochemical and molecular indicators and their correlations to biogenic elements and heavy metals in Testudo hermanni (n = 16). Methods: Biochemical parameters were analyzed using the commercial kit DiaSys and biochemical analyzer Randox RX Monza. Sodium, potassium, and chlorides were measured using the EasyLite analyzer. Oxidative stress was evaluated using colorimetric and luminometric methods. Quantification of chemical elements in the blood was carried out using inductively coupled plasma mass spectrometry (ICPS). Results: Biochemical values of analyzed samples from Hermann’s tortoises were almost the same as referential values described by multiple authors, with minor aberrations in the total protein parameter. Values of arsenic (As) and nickel (Ni) showed correlation with biochemical parameters and the parameters of oxidative stress. Cadmium (Cd) exhibited correlation with aspartate aminotransferase (AST). Conclusions: This study reports correlations among four heavy metals, and their levels were again correlated with biochemical and molecular parameters in Hermann’s tortoises.

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“…MTs are activated by metal regulatory transcription factor 1 (MTF1), present in both adipocytes and muscle cells (Morão et al. 2022 ). A lack of significant differences between muscle and fat samples for Cd and Pb was also found by Novillo et al.…”

Section: Discussionmentioning

confidence: 99%

Toxic metals in Loggerhead sea turtles ( Caretta caretta ) stranded freshly dead along Sicilian coasts

Cammilleri

Galluzzo

Pulvirenti

et al. 2023

Veterinary Quarterly

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Background The Loggerhead sea turtle ( Caretta caretta ) is a marine reptile belonging to a monophyletic group of chelonians. As these animals are long-lived, they have the ability to accumulate pollutants. Aim To collect epidemiological data on toxic metals in marine Loggerhead sea turtles. Materials and Methods Forty Loggerhead sea turtles comprising 25 males and 15 females stranded freshly dead between 2013 and 2018 along the coasts of Sicily, Southern Italy, were examined for arsenic, cadmium, and lead accumulation in muscle and adipose tissues by means of a validated ICP-MS method. A modified K index as a growth condition factor, namely Fulton’s K index, was used. Samples were tested in duplicate. A Wilcoxon rank sum test was carried out to evaluate metal contents differences between muscle and adipose tissues and between genders. Results The Fulton’s K index suggested a good body condition of the C. caretta recovered with mean values of 5.34 ± 3.40 ( n = 40; ±SD). Detectable concentrations of lead were found in 70% of the samples analysed with mean values of 0.65 ± 1.67 mg/kg wet weight and 0.51 ± 1.29 mg/kg wet weight in muscle and adipose tissues, respectively. No significant differences in arsenic, cadmium, and lead were detected between genders. In addition, no significant correlation was found between modified K index and concentrations of arsenic, cadmium, and lead. Clinical relevance Findings on muscle and adipose tissues suggest chronic exposure of Caretta caretta to high concentrations of especially lead which might negatively affect health and welfare of these marine turtles although body condition was good.

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Stress response markers in the blood of São Tomé green sea turtles (Chelonia mydas) and their relation with accumulated metal levels

Cited by 18 publications

References 99 publications

Impact of Heavy Metals in Eggs and Tissues of C. caretta along the Sicilian Coast (Mediterranean Sea)

Impact of Heavy Metals in Eggs and Tissues of C. caretta along the Sicilian Coast (Mediterranean Sea)

Biogenic Elements and Heavy Metals in Hermann’s Tortoises—Testudo hermanni: Effect on Serum Biochemistry and Oxidative Status Parameters

Toxic metals in Loggerhead sea turtles ( Caretta caretta ) stranded freshly dead along Sicilian coasts

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