Study of trace elements in stranded green turtles (&lt;i&gt;Chelonia mydas&lt;/i&gt;), hawksbill turtles (&lt;i&gt;Eretmochelys imbricata&lt;/i&gt;), and olive ridley turtles (&lt;i&gt;Lepidochelys olivacea)&lt;/i&gt; in Gulf of Thailand and Andaman Sea

CHOMCHAT, Poommate; KAEWMONG, Patcharaporn; Sirinarumitr, Kaitkanoke; KOICHIRO, Sera; Noda, Jun; Sirinarumitr, Theerapol

doi:10.1292/jvms.22-0348

Cited by 3 publications

(2 citation statements)

References 52 publications

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“…Concentrations of Co in the blood of C. mydas from populations in Brazil (Prioste et al, 2015), Australia (Gaus et al, 2012), and California (Barraza et al, 2019) were lower than at all coastal sites in the present study (Supporting Information, Table S6). Cobalt was not detected at all in other populations, such as those studied in Thailand (Chomchat et al, 2023) and Hawaii (Shaw et al, 2021). In contrast, Ni was detected at greater levels in the same populations in Thailand (Chomchat et al, 2023) and California (Barraza et al, 2019) but within standard deviations of all sites sampled in Hawaii (Shaw et al, 2021) and Gladstone, Australia (Gaus et al, 2012).…”

Section: Spatial Variation In C Mydas Metal Concentrationsmentioning

confidence: 99%

“…Cobalt was not detected at all in other populations, such as those studied in Thailand (Chomchat et al, 2023) and Hawaii (Shaw et al, 2021). In contrast, Ni was detected at greater levels in the same populations in Thailand (Chomchat et al, 2023) and California (Barraza et al, 2019) but within standard deviations of all sites sampled in Hawaii (Shaw et al, 2021) and Gladstone, Australia (Gaus et al, 2012). Likewise, Pb was also detected at higher concentrations within populations in the Thailand (Chomchat et al, 2023) and Californian (Barraza et al, 2019; Supporting Information, Table S6).…”

Section: Spatial Variation In C Mydas Metal Concentrationsmentioning

confidence: 99%

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Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Wilkinson

Ariel

Merwe

et al. 2023

Enviro Toxic and Chemistry

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Marine turtles face numerous anthropogenic threats, including that of chemical contaminant exposure. Ecotoxicological impact of toxic metals is a global issue facing Chelonia mydas in coastal sites. Local investigation of C. mydas short‐term blood metal profiles is an emerging field, while little research has been conducted on scute metal loads as potential indicators of long‐term exposure. The aim of this study was to investigate and describe C. mydas blood and scute metal profiles in coastal and offshore populations of the Great Barrier Reef (GBR). This was achieved by analysing blood and scute material sampled from local C. mydas populations in five field sites, for a suite of ecologically relevant metals. By applying Principal Component Analysis and comparing coastal sample data to that of reference intervals derived from the control site, insight was gleaned on local metal profiles of each population. Blood metal concentrations in turtles, from coastal sites, were typically elevated when compared with levels recorded in the offshore control population (Howick Island Group, (HWK). Scute metal profiles were similar in Cockle Bay (CB), Upstart Bay (UB) and Edgecombe Bay (EB), all of which were distinct from that of Toolakea (TLK). Some elements were reported at similar concentrations in blood and scutes, but most were higher in scute samples, indicative of temporal accumulation. Coastal C. mydas populations may be at risk of toxic effects from metals such as Co, which was consistently found to be at concentrations magnitudes above region‐specific reference intervals.

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Section: Spatial Variation In C Mydas Metal Concentrationsmentioning

confidence: 99%

Section: Spatial Variation In C Mydas Metal Concentrationsmentioning

confidence: 99%

Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Wilkinson

Ariel

Merwe

et al. 2023

Enviro Toxic and Chemistry

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Trace elements and high sulfur levels in the blood of rehabilitated eastern Mediterranean Sea green sea turtles (Chelonia mydas)

Morick,

Reem,

Lavy

et al. 2024

Science of The Total Environment

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Genetic structure and diversity of green turtle (Chelonia mydas) in the Gulf of Thailand

Chomchat,

Klinsawat,

Sirinarumitr

et al. 2024

Vet World

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Background and Aim: The International Union for the Conservation of Nature and Natural Resources lists the green turtle as endangered. Green turtle nesting behavior in the Gulf of Thailand has decreased to <50% of the 1995 level. The population structure of green turtles in the Gulf of Thailand has not yet been studied. This study aimed to characterize the genetic diversity of green turtles in the Gulf of Thailand based on comparisons of mitochondrial DNA (mtDNA) control region with sequences of Indo-Pacific management units (MUs) and rookeries, to investigate population structures, and to explore phylogeographic relationships. Materials and Methods: Blood samples (1 mL each) from 91 stranded green turtles were collected from four parts of the Gulf of Thailand (eastern, upper, central, and lower). The control mtDNA region was amplified by polymerase chain reaction using LCM15382 and H950 primer. The obtained 384-bp or 770-bp sequences were analyzed for haplotype, clade, and haplotype and nucleotide diversities and were used to construct a phylogenetic tree and haplotype network diagram, respectively. In addition, we analyzed genetic differentiation within and among populations of green turtles in the Gulf of Thailand and between green turtles in the Gulf of Thailand and other Indo- Pacific MUs and rookeries. Results: In total, 12 (based on 384 bp) or 13 (based on 770 bp) haplotypes and two clades (clades VII and VIII) were identified, with nine or 10 haplotypes belonging to clade VIII and three haplotypes belonging to clade VII. Of the new haplotypes, four or five were identified and classified as clade VII (two haplotypes, for both fragment lengths) and clade VIII (two or three haplotypes, for 384 bp or 770 bp fragments, respectively). The overall haplotype and nucleotide diversity of green turtles in the Gulf of Thailand were high (0.755 ± 0.039 and 0.01146 ± 0.00248, respectively). Based on the analysis of molecular variance, green turtles in the Gulf of Thailand could be divided into two subpopulations (UC-Eastern Gulf of Thailand [UC-EGT] and lower Gulf of Thailand [LGT]). Comparisons with other MUs and rookeries in the Indo-Pacific showed that UC-EGT was not genetically different from the Peninsular Malaysia and Eastern Taiwan (Lanyu) MUs and the Terrangganu and Mersing rookeries, and LGT were not genetically different from Peninsular Malaysia, Sipadan, Brunei Bay, Eastern Taiwan (Lanyu), Scott Reef and Browse Island, and Gulf of Carpentaria MUs and the Perak, Perhentain Island, Redang, Pahang, and Vietnam rookeries. Conclusion: To the best of our knowledge, this is the first report to identify the haplotypes and clades of green turtles in the Gulf of Thailand and to show that the populations in the Gulf of Thailand not only present high genetic diversity but also have haplotypic endemism. Longer mtDNA fragments (770 bp) increased the resolution of the stock structure. Clade VII is a unique clade not only for Japan but also for Thailand and Malaysia, and CmP82 is a unique haplotype for both the Gulf of Thailand and Malaysia. Conservation and management of these populations are important to preserve the genetic diversity, biological diversity, and evolutionary potential of green turtles in the Gulf of Thailand. Keywords: genetic diversity, green turtle, Gulf of Thailand, phylogeographic.

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Study of trace elements in stranded green turtles (<i>Chelonia mydas</i>), hawksbill turtles (<i>Eretmochelys imbricata</i>), and olive ridley turtles (<i>Lepidochelys olivacea)</i> in Gulf of Thailand and Andaman Sea

Abstract: Full paper Wildlife ScienceStudy of trace elements in stranded green turtles (Chelonia mydas), hawksbill turtles (Eretmochelys imbricata), and olive ridley turtles (Lepidochelys olivacea

Cited by 3 publications

References 52 publications

Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Green Turtle (Chelonia mydas) Blood and Scute Trace Element Concentrations in the Northern Great Barrier Reef

Trace elements and high sulfur levels in the blood of rehabilitated eastern Mediterranean Sea green sea turtles (Chelonia mydas)

Genetic structure and diversity of green turtle (Chelonia mydas) in the Gulf of Thailand

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